BLZE Backblaze Inc

Filed pursuant to Rule 424(b)(5)
Registration No. 333-279033

The information in this preliminary prospectus supplement and the accompanying base prospectus is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are part of an effective registration statement filed with the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to Completion, dated November 20, 2024

PROSPECTUS SUPPLEMENT

(To Prospectus dated May 1, 2024)

Shares    

Class A Common Stock

This a public offering of shares of Class A common stock of Backblaze, Inc. We are selling      shares of our Class A common stock.

Our Class A common stock has been approved for listing on the Nasdaq Global Market under the symbol “BLZE.” On November 20, 2024, the last reported sale price of our Class A common stock on the Nasdaq Global Market was $6.23 per share.

Investing in our common stock involves a high degree of risk. Please read “Risk Factors” beginning on page S-9 of this prospectus supplement and the documents incorporated by reference into this prospectus supplement and the accompanying prospectus before making a decision to invest in our Class A common stock.

The underwriters may also exercise their option to purchase up to an additional    shares from us, at the public offering price, less the underwriting discount, for 30 days after the date of this prospectus supplement.

We are an “emerging growth company” as defined under the federal securities laws and, as such, have elected to comply with certain reduced reporting requirements for this prospectus supplement and may elect to do so in future filings.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities, or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.

The shares will be ready for delivery on or about November  , 2024.

Joint Book-running Managers

Oppenheimer & Co.    Needham & Company

The date of this prospectus supplement is November   , 2024

TABLE OF CONTENTS

PROSPECTUS SUPPLEMENT

PROSPECTUS

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ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering of shares of our Class A common stock and also adds to and updates information contained in the accompanying base prospectus and the documents incorporated by reference into this prospectus supplement and the accompanying base prospectus. The second part, the accompanying base prospectus, gives more general information, some of which may not apply to this offering. You should read both this prospectus supplement and the accompanying base prospectus before deciding to invest in our Class A common stock.

To the extent there is a conflict between the information contained in this prospectus supplement, on the one hand, and the information contained in the accompanying base prospectus or in any document incorporated by reference in this prospectus supplement having an earlier date than the date of this prospectus supplement, on the other hand, you should rely on the information in this prospectus supplement. You should also read and consider the additional information under the caption “Where You Can Find Additional Information” in this prospectus supplement. In this prospectus supplement, as permitted by law, we “incorporate by reference” information from other documents that we file with the Securities and Exchange Commission, or the SEC. This means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus supplement and the accompanying base prospectus and should be read with the same care. When we update the information contained in documents that have been incorporated by reference by making future filings with the SEC, the information included or incorporated by reference in this prospectus supplement is considered to be automatically updated and superseded.

Neither we nor the underwriters have authorized anyone to provide you with information that is different or in addition to that contained or incorporated by reference in this prospectus supplement, the accompanying prospectus or any free writing prospectus prepared by us or on our behalf. Neither we nor the underwriters take any responsibility for, and can provide no assurance as to the reliability of, any information that others may give. Neither we nor the underwriters are making an offer to sell or soliciting an offer to buy our Class A common stock under any circumstance in any jurisdiction where the offer or solicitation is not permitted. You should not assume that the information in this prospectus supplement, the accompanying prospectus and any free writing prospectus is accurate as of any date other than the respective date of each of those documents, or that any information in documents that we have incorporated by reference is accurate as of any date other than the date of the document incorporated by reference, regardless of the time of delivery of this prospectus supplement or any sale of shares of our Class A common stock hereunder. Our business, financial condition, results of operations and prospects may have changed since those dates.

We are offering to sell, and seeking offers to buy, shares of our Class A common stock only in jurisdictions where offers and sales are permitted. The distribution of this prospectus supplement and the accompanying prospectus and the offering of the Class A common stock in certain jurisdictions may be restricted by law. Persons outside the United States who come into possession of this prospectus supplement and the accompanying prospectus must inform themselves about, and observe any restrictions relating to, the offering of the Class A common stock and the distribution of this prospectus supplement and the accompanying prospectus outside the United States. This prospectus supplement and the accompanying prospectus do not constitute, and may not be used in connection with, an offer to sell, or a solicitation of an offer to buy, any securities offered by this prospectus supplement and the accompanying prospectus by any person in any jurisdiction in which it is unlawful for such person to make such an offer or solicitation.

We urge you to read carefully this prospectus supplement and the accompanying base prospectus as well as the documents incorporated by reference herein and therein, before deciding whether to purchase any of the securities being offered. Neither the delivery of this prospectus supplement or the accompanying base prospectus nor any sale made hereunder shall under any circumstances imply that the information contained or incorporated by reference herein or in the accompanying base prospectus is correct as of any date subsequent to the date hereof or of the accompanying base prospectus, as applicable. You should not assume that the information

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contained in this prospectus supplement and the accompanying base prospectus, and any document incorporated by reference herein or therein is accurate as of any dates other than their respective dates, regardless of the time of delivery of this prospectus supplement or any sale of securities. We provided the information contained in the aforementioned documents only as of the date of the applicable document, and it is possible that the information, including our business, financial condition, and results of operations, may have changed since that date.

Backblaze, the Backblaze logo, and our other registered or common law trademarks appearing in this prospectus supplement are the property of Backblaze, Inc. This prospectus supplement contains references to our trademarks and service marks as well as to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this prospectus supplement, including logos, artwork, and other visual displays, may appear without the ^® or TM symbols, but such references are not intended to indicate in any way that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other entities’ trade names, trademarks, or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other entity.

Unless the context otherwise requires or otherwise indicated, we use the terms “Backblaze,” the “Company,” “we,” “us,” “our” and similar terms to refer to Backblaze, Inc. and its consolidated subsidiaries.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus supplement, the accompanying base prospectus and the documents incorporated by reference herein and therein include statements that constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which statements involve substantial risk and uncertainties. All statements other than statements of historical fact are forward-looking statements.

Forward-looking statements are often identified by the use of words such as, but not limited to, “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “target,” “plan,” “expect,” or the negative of these terms or other similar expressions that concern our expectations, strategy, plans or intentions.

Forward-looking statements involve substantial risk and uncertainties and are not guarantees of future performance and involve risks and uncertainties. The forward-looking statements contained in this prospectus supplement and the information incorporated by reference in this prospectus supplement are based on information then available to us and expectations and assumptions that we deem reasonable at the time the statements are made. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Accordingly, you should not place undue reliance on these forward-looking statements. We do not undertake any obligation to update any forward-looking statements in this prospectus supplement, and the information incorporated by reference in this prospectus supplement or in any of our other communications, except as required by law. All such forward-looking statements should be read as of the time the statements were made and with the recognition that these forward-looking statements may not be complete or accurate at a later date.

Factors that could cause or contribute to such differences include, but are not limited to, those identified below, and those discussed in the section titled “Risk Factors” of our most recent Annual Report on Form 10-K and any subsequent Quarterly Report on Form 10-Q incorporated by reference in this prospectus supplement entitled “Risk Factors.”

Examples of forward-looking statements in this prospectus supplement, the accompanying base prospectus and the documents incorporated by reference herein and therein include, among others, statements we make regarding:

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Investors are cautioned that such forward-looking statements are only predictions, which may differ materially from actual results or future events. Although we believe that our plans, intentions and expectations reflected in the forward-looking statements are reasonable, we cannot be sure that they will be achieved.

The factors and assumptions that could also cause our actual results to differ, perhaps materially, from those in the forward-looking statements are described in this prospectus supplement and the accompanying base prospectus and in our filings with the SEC incorporated by reference herein and therein under the caption “Risk Factors.” The occurrence of any of these risks and uncertainties may cause our actual results to differ materially from those anticipated in our forward-looking statements, which could have a material adverse effect on our business, results of operations and financial condition.

These factors are not intended to represent a complete list of the general or specific factors that may affect us. It should be recognized that other factors, including general economic factors and business strategies, may be significant, presently or in the future, and the factors set forth or incorporated by reference in this prospectus supplement and the accompanying base prospectus may affect us to a greater extent than indicated. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements set forth or incorporated by reference in this prospectus supplement and the accompanying base prospectus.

All forward-looking statements included in this prospectus supplement, the accompanying base prospectus and our filings with the SEC incorporated by reference herein and therein are based on information available to us as of the date of this prospectus supplement and the accompanying base prospectus. Except as required by law, we undertake no obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise. We claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995 for all forward-looking statements.

All forward-looking statements are further qualified by and should be read in conjunction with the risks described or referred to under the heading “Risk Factors” of this prospectus supplement and the accompanying base prospectus and contained in our Annual Report on Form 10-K for the year ended December 31, 2023, our Quarterly Report on Form 10-Q for the quarter ended September 30, 2024 and subsequent periodic filings with the SEC incorporated herein and therein by reference.

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RISK FACTORS

Investing in our Class A common stock involves a high degree of risk. You should carefully consider the risks described below in addition to the remainder of this prospectus supplement and the factors discussed in our public filings with the SEC, including the information provided under the caption “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2023, Quarterly Report on Form 10-Q for the quarter ended September 30, 2024, and subsequent periodic filings with the SEC, before making an investment decision. The risks and uncertainties described below and incorporated by reference into this prospectus supplement are not the only ones related to our business, our Class A common stock or this offering. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also materially and adversely affect our business operations, results of operations, financial condition or prospects. The risks discussed below include forward-looking statements and our actual results may differ substantially from those discussed in the forward-looking statements. You should also review the section of this prospectus supplement under the caption “Special Note Regarding Forward-Looking Statements.”

Risk Factors Summary

Below is a summary of the principal factors that make an investment in our Class A common stock speculative or risky. Importantly, this summary does not address all of the risks that we face. Our ability to execute our business strategy is subject to numerous risks, as more fully described in the section titled “Risk Factors” immediately following this summary. These risks include, among others:

Risks Related to this Offering

If you purchase shares of our Class A common stock sold in this offering, you will experience immediate and substantial dilution in your investment. In addition, we may issue additional equity or equity-linked securities in the future, which may result in additional dilution to you.

The price per share of our Class A common stock being offered may be higher than the net tangible book value per share of our outstanding Class A common stock prior to this offering. Based on the public offering price of

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$    per share, and our net tangible book value as of September 30, 2024 of approximately $(0.31) per share, if you purchase shares of Class A common stock in this offering, you will suffer immediate and substantial dilution of $    per share, representing the difference between the public offering price and the as adjusted net tangible book value per share of our Class A common stock as of September 30, 2024 after giving effect to this offering.

We also have a significant number of stock options to purchase Class A common stock as well as RSUs outstanding, and may choose to issue additional shares of Class A common stock, or securities convertible into or exchangeable for Class A common stock, in the future. In the event that the outstanding stock options or RSUs are exercised or settled, or that we make additional issuances of shares of Class A common stock or other convertible or exchangeable securities, you could experience additional dilution. Furthermore, we cannot assure you that we will be able to issue shares or other securities in any other offering at a price per share that is equal to or greater than the price per share paid by investors in this offering, and investors purchasing our securities in the future may have rights superior to investors purchasing shares in this offering.

Sales of a substantial number of our Class A common stock in the public market could cause our share price to fall.

The market price of our Class A common stock could decline as a result of sales of a large number of shares of our Class A common stock in the market, and the perception that these sales could occur may also depress the market price of our Class A common stock. In addition, our daily trading volume may be limited and significantly less than the amount of shares available for sale. In the event that the number of our Class A common stock shares offered for sale on any given day exceeds the existing demand for our shares, it may cause our stock price to fall.

We may also issue additional shares of our Class A common stock, convertible securities or other equity, including pursuant to our equity compensation plans. Such issuances could be dilutive to investors and could cause the price of shares of our Class A common stock to decline. New investors in such issuances could also receive rights senior to those of holders of shares of our Class A common stock.

The above factors may make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate. Any such sales also could cause the market price of our Class A common stock to fall and make it more difficult for you to sell shares of our Class A common stock.

Our management will have broad discretion in the use of the net proceeds from this offering and may allocate the net proceeds from this offering in ways that you and other stockholders may not approve.

Our management will have broad discretion in the use of the net proceeds, including for any of the purposes described in the section entitled “Use of Proceeds,” and you will not have the opportunity as part of your investment decision to assess whether the net proceeds are being used appropriately. The failure of our management to use these funds effectively could harm our business. Pending their use, we intend to invest the net proceeds from this offering in short- and intermediate-term, interest-bearing obligations, investment-grade instruments, certificates of deposit or direct or guaranteed obligations of the U.S. government. These investments may not yield a favorable return to our stockholders.

The market price of our Class A common stock has been, and will likely continue to be, volatile, and you could lose all or part of your investment.

Prior to the listing of our Class A common stock, there was no public market for shares of our Class A common stock. Since our IPO, the stock price of our Class A common stock has experienced very high volatility and the market prices of securities of other newly public companies have historically been highly volatile. The market price of our Class A common stock could be subject to wide fluctuations in response to various factors, some of which are beyond our control and may not be related to our operating performance.

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Fluctuations in the price of our Class A common stock could cause you to lose all or part of your investment because you may be unable to sell your shares at or above the price you paid. Factors that could cause fluctuations in the market price of our Class A common stock include the following:

Risks Related to Our Business and Our Industry

We have a history of cumulative losses, and we do not expect to be profitable for the foreseeable future.

We incurred net losses of $34.2 million and $47.5 million for the nine months ended September 30, 2024 and 2023, respectively. Over our 17 plus years of operations, we had an accumulated deficit of $181.6 million as of September 30, 2024. We cannot guarantee that net losses in future periods will be similar to those from prior periods. We intend to continue scaling our business to increase our customer base and to meet the increasingly complex needs of our customers. We have invested, and expect to continue to invest, in our sales and marketing organization to sell our cloud services around the world and in our development organization to deliver

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additional features and capabilities of our cloud services to address our customers’ evolving needs. We also expect to continue to make significant investments in our data center infrastructure and technical operations organization as we further scale our business. As a result of our continuing investments to scale our business in each of these areas, we do not expect to be profitable for the foreseeable future. We cannot assure you that we will achieve profitability in the future or that, if we do become profitable, we will sustain profitability.

The markets in which we participate are intensely competitive, and if we do not compete effectively, our operating results would be harmed.

The markets in which we operate are highly competitive, with relatively low barriers to entry for certain applications and services. Some of our competitors include cloud-based services such as those offered by Amazon.com, Inc. through Amazon Web Services, Alphabet Inc. through Google Cloud Platform, and Microsoft Corporation through Azure, and on-premises offerings such as those offered by EMC/Dell and NetApp. Many of our competitors and potential competitors are larger and have greater name and brand recognition; much longer operating histories; larger budgets for the development, promotion and sale of their products or services; broader service offerings and capabilities; and significantly greater resources than we do. In addition, many of our competitors have established marketing and distribution relationships with channel partners, consultants, system integrators, and resellers. Our competitors may also be able to respond more quickly and effectively to new or changing opportunities, technologies, standards, or customer requirements, including offering multiple types of storage solutions with various price points, feature sets and performance levels. Competition may intensify in the future and may also include new market entrants, including storage offerings by some of our partners. Our competitors could offer their products or services at a lower price or in some combination with other services or applications that we do not offer, which could result in pricing pressures on our business. In the third quarter of 2023, we also announced price increases to our Computer Backup and B2 Cloud Storage offerings, which took effect in the fourth quarter of 2023. While there was some incremental decline in the rate at which customers increase storage with us as well as the number of new customers following the price increase, we did not experience any material impact on customer retention as of December 31, 2023 and September 30, 2024, respectively. However, it is difficult to attribute the impact from the price increase compared to other factors or variances in our quarterly results. In any event, while price increases may provide increased revenue from existing customers, any future price increase by us, or reductions in prices by our competitors, could cause us to lose existing customers who do not wish to renew their subscriptions at the higher prices, reduce the number of new customers that buy our products, or decrease the amount of data that customers store with us or subscriptions they purchase from us. Increased competition generally could result in reduced sales, increased customer churn, lower margins, losses, or the failure of our cloud services to achieve or maintain widespread market acceptance, any of which could harm our business.

Any significant disruption in our service, or loss or delay in availability of our customers’ data, could damage our reputation and harm our business and operating results.

Our brand, reputation, and ability to manage our systems; attract, retain, and serve our customers; and interface with our partners, are dependent upon the reliable performance of our platform, including our underlying technical infrastructure, as well as the systems and infrastructure of various third parties, including third-party hosted data centers that we use and internet access and infrastructure used by us and our customers and partners. Our customers rely on our platform to store and access their data, including financial records, business information, personal information, documents, media, and other important content. There are various reasons that our platform, or the systems that are used to access or support our platform, could experience a disruption in service, some of which are entirely outside of our control. For example, our facilities as well as the data centers that we use are vulnerable to damage or interruption from human error, intentional bad acts, extreme weather, earthquakes, floods, fires, war or other military conflict, including the conflicts between Russia-Ukraine and Israel-Hamas, which may further escalate and could directly or indirectly involve other countries, including the United States, terrorist attacks, cybersecurity attacks or the risk of potential cybersecurity attacks, power losses, hardware failures, systems failures, telecommunications failures, and similar events, any of which could disrupt

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our service, destroy user content, or prevent us from being able to continuously back up or record changes in our users’ content. For example, a third party vendor that operated one of our multiple data center locations, filed for bankruptcy under Chapter 11 of the United States Bankruptcy Code in 2022. This bankruptcy matter was resolved without disruption to our normal operations, but future bankruptcies or similar events affecting our third-party hosted data center providers could result in disruptions to our Company, access to customer data may become unavailable or customer data could be lost, and it may take a significant period of time to achieve full resumption of our cloud services. Also, in response to the Russian attack on Ukraine that began in February 2022, the United States and many other countries began imposing sanctions on Russia and certain parts of Ukraine, including restrictions on the import and export of goods and services to those regions. These restrictions have also been expanded to other countries, including Belarus. Although we do not have a significant number of customers located in those regions, such actions have had some immaterial impact on our business. It is difficult to predict how long the conflict may last, how the conflict could escalate, and how the sanctions may evolve, which could cause a greater adverse impact on our business and operations. While we maintain incident response plans that include defined processes, roles, communications, responsibilities and procedures for responding to cybersecurity incidents and other events that impact our operations, and such plans are tested and evaluated on a regular basis, our disaster recovery planning cannot account for all eventualities and even if we anticipate an incident, our disaster recovery plans may not be sufficient to timely and effectively address the issue. Moreover, our platform and technical infrastructure may not be adequately designed with sufficient reliability and redundancy to avoid delays or outages or other issues that could be harmful to our business. If our platform is unavailable when users attempt to access it, or if it does not perform as quickly as they expect, or if data is lost, users may not use our platform as often in the future, or at all.

If we are unable to maintain our brand and reputation, our business, results of operations, and financial condition may be adversely affected.

The successful promotion of our brand and our ability to maintain our reputation will depend on a number of factors, including our performance and the reliability of our cloud services; our advertising and marketing efforts, including our blog and social media presence, which have been important to building and maintaining our brand and reputation; our ability to continue to develop high-quality features and cloud services; and our ability to successfully differentiate our cloud services from competitive products and services. Our brand promotion activities may not be successful or yield increased revenue.

The promotion of our brand may require us to make substantial expenditures, particularly as our markets become more competitive and we expand into new markets or offer new products or services, or additional features. Expenditures intended to maintain and enhance our brand may not be cost-effective or effective at all. If we do not successfully maintain and enhance our brand, we may have reduced pricing power relative to our competitors, we could lose customers, we could fail to attract potential new customers or retain our existing customers, or our blog and thought leadership in our industry may decline in popularity, all of which could materially and adversely affect our business.

If our information technology systems, including the data of our customers stored in our systems, are breached or subject to cybersecurity attacks, our reputation and business may be harmed.

Our customers rely on our solutions to store or use their files, which may include confidential or personally identifiable information, critical business information, photos, and other meaningful content. To manage and maintain such data, we are highly dependent on internal and external information technology systems and infrastructure, including the internet, to securely process, transmit, and store critical information. Although we take measures to protect our systems and sensitive information from unauthorized access or disclosure, third parties may be able to circumvent our security by deploying viruses, worms, and other malicious software programs that are designed to attack or attempt to infiltrate our systems and networks, including distributed denial of service (DDoS) or phishing attacks, that can undermine the availability and performance of our systems and cloud services, lead to the blocking of our services by ISPs or governments, fraudulently steal data, or

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otherwise cause damage to our reputation and negatively impact us and our customers. For example, in December 2021, an industry-wide zero-day vulnerability was discovered in the Apache Log4j logging library commonly used by many companies throughout the world that could permit attackers to take control of vulnerable servers. Although we were not aware of any unauthorized access to our systems due to the Log4j vulnerability, out of an abundance of caution and because Log4j was leveraged widely in our environment, we decided it was in our customers’ best interest to take our systems offline for a short period of time until we could apply the security patch. In addition, we regularly encounter attempts to create false or undesirable user accounts and various types of DDoS attacks, which can disrupt our systems, impair system performance and impact analytics. Moreover, cybersecurity attacks evolve rapidly and are expected to continue to accelerate in both frequency and sophistication, and bad actors may utilize new methods not recognized because they are designed to circumvent controls, avoid detection, and remove or obfuscate forensic evidence. Although we have taken, and continue to take, various actions to prevent and mitigate potential cybersecurity attacks, it is very difficult to successfully identify, stop, or resolve such attacks, or implement adequate preventative measures and we will continue to incur costs in our efforts to protect against and respond to cyber-attacks and potential cyber-attacks. Also, the use of generative artificial intelligence, or other societal or political developments resulting in periods of increased political tensions and military conflicts, could result in a greater likelihood of cybersecurity incidents that could either directly or indirectly impact our operations. In addition, employee or consultant error, malfeasance, or other errors in the storage, use, or transmission of customer data could result in a breach. For example, in late March 2021, it was discovered that a Backblaze marketing campaign leveraging the Facebook ad network, which had been launched two weeks earlier, had been incorrectly configured to run on all Backblaze platform pages instead of only the Backblaze marketing pages as intended. Once we became aware of the issue, it was promptly resolved. Although we believe that less than 2% of Backblaze customers may have been affected, and no actual customer files, file contents, or user account information were shared at any time, certain file metadata may have been inadvertently shared with Facebook. Even if a breach is detected, the full extent of the breach may not be determined immediately, or at all. While we maintain insurance coverage to mitigate the potential financial impact of these risks, our insurance may not cover all such events or may be insufficient to compensate us for potentially significant losses, including the potential damage to the future growth of our business that may result from any such breach. In addition, our business utilizes information technology systems of our partners and vendors, who are also subject to similar cybersecurity risks that could adversely impact the security of our systems and business. Although we take steps to secure customer information that is provided to or accessible by our partners and vendors, such measures may not always be effective and we may have limited or no control over how cybersecurity attacks on our partners or vendors are addressed. An actual or perceived breach of our network security and systems or other cybersecurity-related events that cause the loss, theft or unauthorized disclosure of our customers’ information, including any delay in determining the full extent of a potential breach, could have a material adverse impact on our business, results of operations, and financial condition, including harm to our reputation and brand, reduced demand for our solutions, time-consuming and expensive litigation, fines, penalties, and other damages.

If we are unable to attract and retain customers on a cost-effective basis, our revenue and operating results would be adversely affected.

We generate substantially all of our revenue from the sale of our cloud services either on a consumption or subscription model. To grow, we must continue to attract a large number of customers on a cost-effective basis. While there was no material negative impact on customer retention as of December 31, 2023 as a result of our recent price increase for Computer Backup and B2 Cloud Storage in late 2023, any price increases could make it more difficult to attract new customers and retain existing customers, or cause existing customers to reduce the amount of data that they store with us, thus negatively impacting our revenue and business. We have historically used, and plan to increase our use of, a variety of advertising and marketing programs to promote our cloud services. Our sales and marketing investments intended to accelerate the scaling of our business including any expansion of existing programs and new programs to promote our cloud services, may not be successful or provide a reasonable return on investment within a desired timeframe. Significant increases in the pricing of one or more of our advertising channels would increase our advertising and marketing costs or cause us to choose

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less expensive and perhaps less effective channels. We may also need to expand into channels with significantly higher costs, which could adversely affect our operating results. We may also incur increased sales and marketing expenses and engineering and operating expenses, including infrastructure expenditures, significantly in advance of the time we anticipate recognizing any revenue generated by such expenses, and we may only at a later date, or never, experience an increase in revenue or other benefits as a result of such expenditures. If we are unable to achieve effective advertising and marketing programs or successfully expand our solution offerings and operations, our ability to attract new customers could be adversely affected, our advertising and marketing expenses could increase substantially, and our operating results may suffer.

A portion of our potential customers locate our website through search engines, such as Google, Bing, and Yahoo!. In 2023 we modernized our website to help improve the user experience and increase traffic through search engine optimization to accelerate lead generation, although such efforts may not be as successful as anticipated to increase web traffic and improve the user experience. Our ability to maintain the number of visitors directed to our website is not entirely within our control. If search engine companies modify their search algorithms in a manner that reduces the prominence of our listing, or if our competitors’ search engine optimization efforts are more successful than ours, fewer potential customers may click through to our website. In addition, the cost of purchased listings has increased in the past and may increase in the future. A decrease in website traffic or an increase in promoted search result costs could adversely affect our customer acquisition efforts and our operating results. In addition, we also rely on our blog and word of mouth to drive additional customers. To the extent our blog does not continue to attract readers or if our reputation is harmed, these additional means of attracting customers may no longer provide significant numbers of customers in the future. In addition, because we offer our Computer Backup cloud service at a fixed price, the amount of data our customers back up affects our costs and gross margins. Subject to certain limitations, we also offer free egress for our B2 Cloud Storage customers. To the extent current or future customers back up unusually large amounts of data, use an excessive amount of egress or growth in the amount of data backed up per customer outpaces decreases in storage costs, our costs, gross margins and infrastructure could be adversely affected.

If we are unable to provide successful enhancements, new features, and modifications to our cloud services, our business could be adversely affected.

Our industry is marked by rapid technological developments and new and enhanced applications and cloud services. If we are unable to provide enhancements and new features for our existing services or new services that achieve market acceptance or that keep pace with rapid technological developments, our business could be adversely affected. We have recently launched various new product features and other changes, including Event Notification and Live Read. We cannot be certain whether such features and other changes will achieve a desired level of market adoption and return on investment. In addition, because our cloud services are designed to operate on a variety of systems, we will need to continuously modify and enhance our cloud services to keep pace with changes in internet-related hardware, operating systems, and other software, communication, browser, and database technologies, including the systems of our partners, vendors, and competitors. We also have limited internal resources and thus need to selectively prioritize features and other development and infrastructure projects, and de-prioritize other such projects. Although we seek to prioritize the projects that we believe are the most important and de-prioritize projects of lesser importance based on the information available to us at any given time, there is no guarantee that our prioritization efforts will achieve the desired market adoption or infrastructure improvements and we may not be successful in either developing these modifications and enhancements or in bringing them to market in a timely fashion. In addition, any failure of our cloud services to operate effectively and on a timely basis with network platforms and technologies could reduce the demand for our cloud services, result in customer dissatisfaction and adversely affect our business. Furthermore, future enhancements, features or offerings may increase our research and development expenses and infrastructure costs, which could adversely impact our pricing advantage, undermine our ease of use, make it more difficult to attract and retain customers, and harm our results of operations.

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Material defects or errors in our software or hardware failures could negatively impact our business, harm our reputation, result in significant costs to us, and negatively impact our ability to sell our cloud services.

The software underlying our cloud services is inherently complex and may contain material defects or errors, particularly when first introduced or when new versions or enhancements are released. We have from time to time found defects or errors in our cloud services, and new defects or errors in our existing solutions may be detected in the future by us, our customers or partners, or other third parties. The costs incurred in correcting such defects or errors may be substantial and could negatively impact our business. Backblaze employees could also introduce defects or errors through incompetence, malfeasance, or a mistake that would lead to data loss. For example, to the extent that the encryption keys for encrypted customer data stored by Backblaze were to be deleted or corrupted, the data could become unrecoverable. In addition, we rely on hardware purchased or leased and software licensed from third parties to offer our cloud services. Hardware is susceptible to failures over time and may require increased maintenance effort and costs. Any defects in, or unavailability of, our software or hardware failures that cause interruptions to the availability of our cloud services or that otherwise impact our business could, among other things:

If we fail to effectively manage our growth, our business would be harmed.

We have recently experienced, and continue to experience, a period of rapid growth. For example, our headcount grew from 188 employees as of December 31, 2020, to 381 as of December 31, 2023. Also, in just the last two years the amount of storage deployed by us has increased significantly. The number of customer requests on our network has also increased rapidly in recent years. Our growth may not be sustainable. In 2023, we initiated measures to reduce headcount to pursue greater cost efficiency and align strategic initiatives. These measures were completed during the first nine months of 2023. Nevertheless, in the long term, we expect to continue to expand our operations and to increase our headcount, network, and product offerings significantly. Our growth has placed, and future growth will continue to place, a significant strain on our management, corporate culture, quality of our cloud services, and administrative, operational, security, and financial infrastructure. Our headcount needs may also fluctuate on a quarterly and annual basis and we may seek, and have sought by way of the recent restructuring measures, to “right size” our workforce from time to time due to changing business needs and other conditions, and it may be difficult to effectively manage our workforce on a timely basis in response to such changes. It is also important that we successfully leverage our existing employee base and any headcount growth, particularly as our business grows and the corresponding demands on our business increase. Our success will depend in part on our ability to manage this growth effectively, which will require that we, among other things, continue to improve our administrative, operational, financial, and management systems and controls. If we fail to manage our growth, the quality of our services may suffer, which could negatively affect our brand and reputation and harm our ability to retain and attract customers and employees.

Our business could be materially harmed to the extent that we do not effectively manage our data center capacity and the costs associated with our data centers.

We must continue to effectively manage our capital expenditures by maintaining and expanding our data center capacity, servers and equipment, and locations. The costs of leasing, building out and maintaining our data centers constitute a significant portion of our capital and operating expenses. To manage our data center capacity and the associated capital expenditures, we continuously evaluate our short and long-term data center capacity

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requirements. However, because our customer retention and the amount of data that they store with us may increase, decline or fluctuate as a result of a number of factors it is difficult to accurately predict our capacity needs over time. If we underestimate the data center capacity needed to address increases in volume usage, or there is not enough capacity at the data centers at commercially acceptable rates, or at all, we may be unable to increase our data center capacity in an expedient and cost-effective manner, which could result in materially adverse effects on our business and our results of operations. For example, if we are not able to obtain data center capacity on a timely basis, the ability for customers to upload or download data could be negatively impacted. As a result, we might be unable to attract new customers or retain existing customers and could cause existing customers to reduce the amount of data that they store with us. In such a scenario, we may also be required to enter into leases or other agreements for data centers, servers and other equipment that are more expensive than they otherwise would be as a result of the increased demand and competition in the market for data center capacity. It can also take time to add data center capacity, whether at existing data center locations or new locations, and therefore, we may also not be able to expand our data center capacity to address customer needs on a timely basis. In addition, many of our data center sites are subject to multi-year leases. If our capacity needs are reduced, or if we decide to close a data center, we may nonetheless be committed to perform our obligations under the applicable leases including, among other things, paying the base rent for the balance of the lease term and continuing to pay for any servers or other equipment. If we overestimate our data center capacity requirements, and therefore secure excess data center capacity and servers or other equipment, then our capital expenditures could be materially increased and our operating margins could be materially reduced. To the extent we pursue any expansion of our data center footprint, our infrastructure and maintenance costs will increase. In addition, we will generally incur expenses in advance of receiving any increase in customers, revenue or other benefits. Any expansion outside of the United States will also increase the costs of compliance with local laws and regulations. As a result, we may not be able to recover the cost of those investments, which could materially adversely affect our business and results of operations. We may also be subject to risks and unanticipated increases in energy costs as a result of: regulations intended to regulate carbon emissions and other pollutants, laws requiring enhanced energy efficiency measures, surcharges related to recovering the cost of extreme weather events and natural disasters, geopolitical conflicts, military conflicts, grid modernization charges, as well as other charges. Such increases could adversely affect our business financial conditions and results of operations.

Our business depends on our ability to retain and increase revenue from customers, and if we are unable to do so, our revenue and operating results would be adversely affected.

It is important for our business that our customers continue to use, and even increase their use of, our cloud services. Many of our customers can terminate their use of our cloud services at will with little-to-no advance notice. Even though some of our customers enter into longer-term multi-year agreements, they generally have no obligation to renew their subscriptions or increase usage. Due to our varied customer base and lack of long-term customer and usage commitments, it can be difficult to accurately predict our customer retention rate on a quarterly basis or long-term basis. Our customer retention and the amount of data that they store with us may decline or fluctuate as a result of a number of factors, including potential customer dissatisfaction with our cloud services and offerings; pricing plans; our customers’ own business conditions; customer decisions to delete unneeded or redundant data; the perception, whether or not accurate, that competitive products provide better options; changes in our brand or reputation; and overall general economic conditions. Our recent price increase for Computer Backup and B2 Cloud Storage could make it more difficult to attract new customers and retain existing customers, or cause existing customers to reduce the amount of data that they store with us or subscriptions they purchase from us. Our future financial performance also depends in part on our ability to continue to increase revenue from our customers through new features and additional paid products, such as Event Notifications, Live Read, Enterprise Control and multi-region selection. Our customers’ decision whether to opt for additional paid products is driven by a number of factors. If our customers do not perceive the value in such additional paid offerings, we may not realize the anticipated benefits of our investments in such additional features, and our financial results could be harmed. If we cannot successfully retain our existing customers and

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add new customers consistent with historical rates, including maintaining or growing the amount of data that our customers store with us, our revenue and ability to grow may be adversely affected.

To the extent we target different types of customers, we may face increased demands and challenges that adversely impact our business and operations.

Historically, most of our customers consisted of small-to-medium sized businesses and individuals. Our growth strategy is in part dependent upon attracting and retaining customers that are larger businesses and organizations. To the extent we target other types of customers or customers with different or specific needs, we may face greater demand for certain service enhancements or features that we do not currently offer, or additional performance, availability, durability, and security requirements. We may face increased competition from some of our competitors that typically target larger businesses and organizations and that may have pre-existing relationships or purchase commitments, that may have more experienced sales personnel or greater budgetary resources available to target larger customers, or that may be able to bundle other services with an offering that is competitive with ours. Certain types of customers may also have longer sales cycles, less predictability or higher volatility in the amount of data they store with us, increased pricing or negotiation leverage, and increased customer education, prolonged contract negotiations and overall customer engagement needs. In addition, some customers may demand more customization, integration, and support services. Any of these factors could require us to devote greater sales, engineering, marketing, operations, and support services as well as make significant infrastructure changes, which could increase our costs, divert key resources from other current and prospective customers, and otherwise adversely affect our business and operating results. These increased demands and challenges may also be for the benefit of a limited number of customers. In addition, the loss of any larger customers will have a greater impact on our financial results than the loss of smaller customers. Moreover, we cannot assure you that our efforts to attract and retain customers will be successful or justify the additional investments in a timely manner, or at all.

The material stored using our cloud services may subject us to negative publicity, legal liability, and harm our business.

We are not aware of the contents of the data that customers store using our cloud services. While we do have a detailed process to address any third-party complaint regarding illegal or other inappropriate use of our cloud services by a customer that would violate our terms of service, for security and privacy reasons we do not actively monitor the content of data that is being stored with us. To the extent that sensitive, personally identifiable, illegal, or controversial data is stored in our servers and that becomes known publicly, particularly given the highly volatile nature of the political landscape throughout the world and immediate access by individuals to social media platforms with a broad outreach, it may create negative publicity and adversely impact our reputation and harm our business.

Our quarterly results may fluctuate significantly and may not fully reflect the underlying performance of our business.

Our quarterly results of operations may vary significantly in the future. Accordingly, the results of any one quarter should not be relied upon as an indication of future performance. Our quarterly results of operations may fluctuate as a result of a variety of factors, many of which are outside of our control, and as a result may not fully reflect the underlying performance of our business. Fluctuation in quarterly results may negatively impact the trading price of our Class A common stock. Factors that may cause fluctuations in our quarterly results of operations include, without limitation:

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For example, in addition to the risks from sanctions and other restrictions discussed elsewhere in these Risk Factors in connection with the Russian attack on Ukraine that began in February 2022, in order to help the people of Ukraine facing a humanitarian crisis, while it is subject to change, we are currently waiving charges for our services for customers based in Ukraine. We are also unable to receive payments from customers in certain regions that are subject to banking or other credit card payment restrictions, including Russia and Belarus. Although we do not have a significant amount of customers located in these regions, such actions will have some impact on our business. The Russian-Ukraine conflict has also caused oil prices to rise and increased the risk of disruption to the supply chain for oil, and the Israel-Hamas conflict may cause similar effects, particularly if those tensions escalate into a wider Middle East conflict, which could result in higher energy costs for our business and data centers, which could negatively impact our results of operations. The hostilities in various places around the world could also escalate further and directly or indirectly involve other countries, including the United States, which could cause a greater impact on us and our customers, partners and supplies.

Further, as we continue to grow and scale our business to meet the needs of our customers, we may overestimate or underestimate our infrastructure capacity requirements, which could adversely affect our results of operations. The costs associated with leasing and maintaining our custom-built infrastructure in co-location facilities and third-party data centers already constitute a significant portion of our capital and operating expenses. We continuously evaluate our short and long-term infrastructure capacity requirements and seek to ensure adequate capacity for new and existing users while minimizing unnecessary excess capacity costs. However, we may not be able to sufficiently predict future demand, or the availability of hardware or infrastructure necessary to support increased demand on a timely basis. If we overestimate the demand for our platform and therefore secure excess infrastructure capacity or equipment, our gross margins could be reduced. If we underestimate our infrastructure capacity requirements or availability of necessary hardware or infrastructure, we may not be able to service the needs of new and existing customers; durability, reliability, and performance could suffer; our costs could rise; and our business could be harmed.

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We rely on the performance of key personnel, including our management and other key employees, and the loss of one or more of such personnel, or of a significant number of our team members, could harm our business.

We believe our success has depended, and continues to depend, on the efforts and talents of senior management and other key personnel. Substantially all of our employees, including our senior management, are employed on an at-will basis. We cannot ensure that we will be able to retain the services of any member of our senior management or other key employees, particularly given that some of these employees may hold equity of the Company that is largely vested, or that we would be able to timely replace members of our senior management or other key employees should any of them depart. The loss of one or more members of our senior management or other key employees could harm our business.

The failure to attract and retain additional qualified personnel could prevent us from executing our business strategy.

To execute our business strategy, we must attract and retain highly qualified personnel. Competition for executive officers, software developers, sales personnel, operational personnel, and other key employees in our industry is intense. In particular, we compete with many other companies for software developers with high levels of experience in designing, developing, and managing cloud-based software, as well as for skilled sales and operations professionals. In addition, we believe that the success of our business and corporate culture depends on employing a diverse workforce, and the competition for such personnel is significant. The market for such talented personnel is particularly competitive in the San Francisco Bay Area, where our headquarters is located. Many of the companies with which we compete for experienced personnel have greater resources than we do and can frequently offer such personnel substantially greater compensation than we can offer. In addition, in 2024 we implemented a new commission structure for our sales team. If our new sales commission program does not effectively incentivize our sales team at appropriate compensation levels, we may not be successful in retaining or hiring qualified sales personnel, obtaining new customers, increasing sales to our existing customer base, or effectively managing compensation levels. In addition, we may be unsuccessful at retaining our key employees, and it may take significant time for new employees to achieve full productivity, either of which would adversely impact our business, results of operations, and financial condition. If we fail to attract new personnel, including accomplished executive talent, or if we fail to retain and motivate our current personnel, our business would be harmed. In addition, if we are unable to hire new employees on a timely basis or reach productive levels in a short time frame, new growth initiatives and other projects may be delayed or otherwise disrupted, which could cause us to miss our performance goals and negatively impact our business.

Our corporate culture has contributed to our success, and if we cannot maintain this culture as we grow, we could lose the innovation, creativity, and teamwork fostered by our culture, and our business may be harmed.

We have a culture that encourages employees to be open, collaborate, strive to do the right thing, and develop and launch new and innovative solutions, which we believe is essential to attracting customers and partners and serving the best, long-term interests of our company. As our business grows and becomes more complex, and now that we are a public company, it may become more difficult to maintain this cultural emphasis. Any failure to preserve our culture could negatively affect our ability to retain and recruit personnel, which is critical to our growth, and to effectively focus on and pursue our strategies. If we fail to maintain our company culture, our business and competitive position may be harmed.

As we expand our operations outside the United States, we may be subject to increased business, regulatory and economic risks that could impact our results of operations.

In the nine months ended September 30, 2024, we derived approximately 27% of our revenue from customers outside of the United States. We may also expand our international operations, which may include the establishment of foreign subsidiaries, the opening and expansion of data centers, hiring employees, building out technical infrastructure, and opening offices in foreign jurisdictions. Any new markets or countries into which we

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attempt to market and sell our cloud services may not be receptive. For example, we may be unable to expand further in some markets if we are unable to satisfy various government- and region-specific requirements, and the increased costs of compliance with local laws and regulations or standards in other countries may further increase the costs and result in delays, and, as a result, we may not be able to recover the cost of these investments, which could materially adversely affect our business and results of operations. In addition, our ability to manage our business and conduct our operations internationally requires considerable management attention and resources and is subject to the particular challenges and complexities of deploying infrastructure internationally and supporting a rapidly growing business in an environment of multiple languages, cultures, customs, legal and regulatory systems, alternative dispute systems, and commercial markets. International expansion has required, and will continue to require, investment of significant funds and other resources. Growth in our international operations will subject us to new risks and may increase risks that we currently face, including risks associated with:

Expanding our international operations and complying with applicable laws and regulations may substantially increase our cost of doing business in international jurisdictions. We may also be unable to keep current with

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changes in laws and regulations as they develop, and we or our employees, contractors, partners, and agents may fail to maintain compliance with applicable laws and regulations. Any violations could result in enforcement actions, fines, civil and criminal penalties, damages, injunctions, or reputational harm. If we are unable to comply with these laws and regulations or manage the complexity of our global operations successfully, our business, results of operations, and financial condition could be adversely affected.

We store personal information and other customer data, which subjects us to various data privacy laws, governmental regulations, and other related legal obligations, and any actual or perceived failure to comply with such requirements could harm our business.

We store personal information and other customer data, as well as use certain cookies on our website, that are subject to numerous federal, state, local, and foreign laws regarding privacy and the storing and protection of personal information and other customer data, and disclosure requirements regarding the use and certain breaches of such laws. For example, we are subject to the General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA) and the California Privacy Rights Act of 2020 (CPRA), among other laws and regulations around the world. Other comprehensive data privacy or data protection laws or regulations requiring local data residency and/or restricting the international transfer of data have been passed or are under consideration in other jurisdictions. In addition, some industries have industry-specific requirements relating to compliance with certain security and regulatory standards, such as those required by the Health Insurance Portability and Accountability Act (HIPAA). For example, HIPAA imposes privacy, security, and breach reporting obligations with respect to individually identifiable health information upon “covered entities” (e.g., health plans, health care clearinghouses, and certain health care providers), and their respective business associates, individuals, or entities that create, receive, maintain or transmit protected health information in connection with providing a service for or on behalf of a covered entity. Such laws give rise to an increasingly complex set of compliance obligations on us regarding our ability to gather, use, and store customer data and customer account data.

These privacy and data protection laws are subject to rapid change and differing interpretations, may require limited timeframes to implement changes, and can be inconsistent among regulatory frameworks or conflict with other rules or our business practices. We strive to comply with all applicable laws, policies, legal obligations, and industry codes of conduct relating to privacy and data protection to the extent possible. Our efforts to comply with the complex matrix of data privacy laws around the world subjects us to increasing costs to review and comply with such laws, including updating our policies, procedures, and business practices to address such evolving privacy laws. We also make public statements and commitments regarding our use and disclosure of personal information through our privacy policy, information provided on our website, and data processing agreements with customers and other third parties. Because the interpretation and application of data protection laws, regulations, standards, and other obligations are often uncertain and in flux, and sometimes contradictory, it is possible that the scope and requirements of these laws and other obligations may be interpreted and applied in a manner that is inconsistent with our practices, and our efforts to comply with rapidly evolving data protection laws and obligations may be unsuccessful. For example, we previously relied on the EU-US Privacy Shield framework, which was invalidated by a European court in July 2020. As a result of such a decision, we have had to take additional steps to comply with applicable EU data protection requirements, including implementation of standard contractual clauses.

Any failure, or perceived failure, by us to comply with applicable privacy and security laws, policies, or related contractual obligations, or any compromise of security that results in unauthorized access, or the use or transmission of personal information or other customer data, could result in a variety of claims against us, including governmental enforcement actions and investigations, audits, inquiries, whistleblower complaints, class action privacy litigation in certain jurisdictions, and proceedings by data protection authorities. For example, under the GDPR we may be subject to fines of up to €20 million or up to 4% of the total worldwide annual group turnover of the preceding financial year, as well as potentially face claims from individuals. The CCPA provides for civil penalties for violations, as well as a private right of action for certain data breaches that result in the loss

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of personal information. This private right of action may increase the likelihood of, and risks associated with, data breach litigation. The CPRA added new requirements and consumer privacy rights as well as the creation of the California Privacy Protection Agency as a dedicated agency to implement and enforce California state privacy laws, investigate violations and assess penalties. Any new or currently applicable privacy and security laws, policies, or related contractual obligations may be enacted, adopted, or modified, the result of which may impact our compliance efforts, especially when certain emerging privacy laws are still subject to a high degree of uncertainty as to their interpretation, application and impact. Any non-compliance with data privacy requirements could subject us to significant fines and penalties, adverse media coverage, reputational damage, the loss of current and potential customers, loss of export privileges, or criminal or other civil sanctions, any of which could materially adversely affect our business and financial condition.

Our business is substantially dependent on mid-market organizations, which may be more vulnerable to market fluctuations and other economic factors, and their vulnerability to such factors could negatively impact our business.

If we are unable to successfully market and sell our cloud services to mid-market organizations, our ability to grow our revenue and achieve profitability will be harmed. We expect it will be more difficult and expensive to attract and retain mid-market organization customers than other customers because mid-market organizations are more frequently forced to curtail or cease operations due to the sale or failure of their business; can be more difficult to identify and may require more expensive, targeted sales campaigns; and generally have lesser amounts of data to store than larger organizations, thus requiring us to successfully sell to and support more mid-market organizations for meaningful revenue impact. In addition, mid-market organizations frequently have limited budgets and are more likely to be significantly affected by economic downturns than larger, more established companies. For example, recent high inflation and recession concerns in the United States could have a greater adverse impact on mid-market organizations. As a result, mid-market organizations may choose to spend funds on items other than our cloud services, particularly during difficult economic times. If we do not achieve continued success among mid-market organizations, our business, operating results, and future growth would be adversely affected.

We are dependent on a small number of service offerings, and any reduced market adoption of these offerings would result in lower revenue and harm our business.

As a specialized cloud vendor, we are dependent on a small number of offerings focused on cloud storage and computer backup, and a limited number of corresponding use cases. Our B2 Cloud Storage and Computer Backup offerings have accounted for substantially all of our total revenue to date and we anticipate that they will continue to do so for the foreseeable future. As a result, our revenue could be reduced as a result of any general or industry decline in demand for cloud-based storage solutions, particularly given that we would not have meaningful revenue from other market sectors to offset any temporary or longer-term downturn in demand for cloud-based storage solutions.

Adverse economic conditions may adversely impact our revenue and profitability.

Our operations and financial performance depend in part on worldwide economic conditions and the impact these conditions have on levels of spending on cloud storage solutions. Our business depends on the overall demand for these products and on the economic health and general willingness of our current and prospective customers to purchase our cloud services. Some of our paying customers may view use of cloud storage services as a discretionary purchase and may reduce their discretionary spending on our cloud services during an economic downturn. Weak economic conditions, whether due to the banking and financial crises, a return of pandemic conditions, inflation, uncertainty relating to the hostilities with Russia-Ukraine and Israel-Hamas, and the potential escalation of geopolitical tensions that could also directly or indirectly involve other countries, including the United States, could cause a reduction in spending on products and solutions storage. Inflation has increased significantly over levels from the last few years in the United States amid a slowing economy and there

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are numerous indicators suggesting a potential economic recession in the United States and other regions of the world. Any such conditions could reduce sales, lengthen sales cycles, increase customer churn, and lower demand for our cloud services, which could adversely affect our business, results of operations, and financial condition. We also have been, and may in the future be, subject to increased energy costs, particularly with respect to our data center operations in Europe and elsewhere, which could adversely affect our expenses and business. In addition, the upcoming 2024 U.S. presidential election could lead to changes in economic conditions or economic uncertainties in the United States and globally. Any such changes or uncertainties, including in international trade relations, legislation and regulations (including those related to taxation and importation), or economic and monetary policies, could result in heightened diplomatic tensions or political and civil unrest, among other potential impacts, and have a material adverse effect on the global economy as a whole and/or our business, or may require us to significantly modify one or more of our current business practices.

Our ability to maintain customer adoption and satisfaction depends in part on the ease of use of our cloud services, and any such failure could have an adverse effect on our business.

Our success in retaining existing customers and obtaining new customers is dependent in part on the ease of use of our cloud services. If our platform and cloud services, including new service offerings and features as they become available, become more complicated and less easy-to-use, customers could experience increased difficulties or disruption with storing or accessing their data, and we may lose existing customers or experience increased challenges obtaining new customers or existing customers may not choose to use additional features of our cloud services. In addition, our customers sometimes depend on our technical support services to resolve issues relating to our platform. If we do not succeed in helping our customers quickly resolve issues or provide effective ongoing education related to our platform, our reputation and business may be harmed.

Future acquisitions and investments could disrupt our business and harm our financial condition and operating results.

Our success will depend, in part, on our ability to grow our business in response to changing technologies, customer demands, and competitive pressures. In some circumstances, we may choose to do so through the acquisition of complementary businesses and technologies rather than through internal development. The identification of suitable acquisition candidates can be difficult, time-consuming, and costly, and we may be unable to successfully complete proposed acquisitions. The risks we face in connection with acquisitions include:

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Future acquisitions could also result in dilutive issuances of our equity securities, the incurrence of debt, contingent liabilities, amortization expenses, incremental operating expenses, or the write-off of goodwill, any of which could harm our financial condition or operating results.

We may require additional capital to support our operations or the growth of our business, and we cannot be certain that this capital will be available on reasonable terms when required, or at all.

We may need additional financing to operate or grow our business. Our ability to obtain additional financing, if and when required, will depend on investor and lender demand, our operating performance, the condition of the capital markets, and other factors. For example, we often use leases to finance the equipment we use to provide our cloud-based services, and we have a revolving credit agreement with City National Bank. In addition, the stock market has recently experienced significant volatility, including with respect to technology stocks, due to high inflation, various economic headwinds and other factors. In the event of a failure of any financial institutions where we maintain deposits, we may lose timely access to our funds at such institutions and incur significant losses to the extent our funds exceed the $250,000 limit insured by the Federal Deposit Insurance Corporation. In addition, we use City National Bank, a subsidiary of RBC, for our banking needs. While we and our bank have not been directly affected by the recent failures of certain banks, the banking industry overall has experienced disruption, greater uncertainty, and tightened lending standards. This may result in reduced access to capital, increased costs of capital, and reduced opportunities to invest with investment grade securities, which could also lower investment yields and investment income. Any such impact could have a material adverse effect upon our liquidity and business. Without additional access to this kind of capital on commercially reasonable terms, or at all, we may not be able to respond to increased demand for our cloud services on a timely or cost-effective basis. We cannot guarantee that additional financing will be available to us on favorable terms when required, or at all. If we raise additional funds through the issuance of equity, equity-linked, or debt securities, those securities may have rights, preferences, or privileges senior to the rights of our Class A common stock, and our existing stockholders may experience dilution. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to support the operation or growth of our business could be significantly impaired and our operating results may be harmed.

We are an emerging growth company, and any decision on our part to comply only with certain reduced reporting and disclosure requirements applicable to emerging growth companies could make our Class A common stock less attractive to investors.

We are an emerging growth company, and for as long as we continue to be an emerging growth company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public companies but not to “emerging growth companies,” including: not being required to have our independent registered public accounting firm audit our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act of 2002, as amended (the Sarbanes Oxley Act), reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a non-binding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Under the JOBS Act, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to avail ourselves of this accommodation allowing for delayed adoption of new or revised accounting standards, and therefore, we will not be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies. We could be an emerging growth company for up to five years following the completion of our IPO or until we reach certain thresholds. Investors may find our Class A common stock less attractive due to our election to rely on these exemptions and there may be a less active trading market for our Class A common stock and the market price of our Class A common stock may be more volatile.

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We are exposed to fluctuations in currency exchange rates, which could negatively affect our results of operations.

All of our sales contracts, and substantially all of our operations and related financial arrangements, are currently denominated in U.S. dollars and therefore, our revenue and business operations are not directly subject to significant foreign currency risk. However, a strengthening of the U.S. dollar could increase the real cost of our cloud services to our customers outside of the United States, which could reduce demand for our cloud services and adversely affect our financial condition and results of operations. In addition, as we expand our international operations, we may become more exposed to foreign currency risk and may have some of our sales and other operations denominated in one or more currencies other than the U.S. dollar. If we become more exposed to currency fluctuations and are unable to successfully hedge against the risks associated with currency fluctuations, our results of operations could be materially and adversely affected.

Any litigation against us could be costly and time-consuming to defend.

We are and may become subject to legal proceedings, investigations, and claims that arise in the ordinary course of business. For example, we are and may be subject to claims brought by customers, vendors or other third parties in connection with various types of disputes, including relating to commercial or contract matters, violation of securities laws, intellectual property laws or other laws, or privacy or other data breaches, or employment claims made by our current or former employees. Litigation can often be expensive, even when there is a successful outcome, and can divert management’s attention and resources, which could harm our business and financial condition. Any adverse outcome could also result in significant monetary damages or other types of unfavorable relief, which could harm our business as well as our reputation. Although we may have various insurance policies, insurance might not cover such claims or provide sufficient payments to cover all the costs to resolve one or more such claims, and might not continue to be available on terms acceptable to us, including premium increases or the imposition of large deductible or co-insurance requirements. In addition, we are also and may also be subject to subpoena requests from third parties as well as governmental agencies from time to time that require us to provide certain information relating to matters targeted against other third parties, which can be time consuming.

Risks Related to Reliance on Infrastructure and Third Parties

We rely on third-party vendors and suppliers, including data center and hard drive providers, which may have limited sources of supply, and this reliance exposes us to potential supply and service disruptions that could harm our business.

We depend on a limited number of third-party data centers and other providers to safely house our equipment and provide sufficient power, bandwidth, and other infrastructure needs to support our operations and cloud services. To support our anticipated growth and as we develop and implement new product features we may require more computing infrastructure, which may include the opening and expansion of data centers. The risks we face in connection with the opening and expansion of data centers include:

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We also rely on key components for our platform, including hard drives and semiconductors, which come from limited sources of supply. Any decrease in hard drive availability could negatively impact our operations. Various events, including a pandemic or fluctuating demands in the cryptocurrency mining markets have impacted, and could impact in the future, our ability to source components in a timely and cost-effective manner from third-party suppliers. For example, for a limited period of time starting in April 2020, we acquired additional hard drives and related infrastructure through finance lease agreements in order to minimize the impact of potential supply chain disruptions due to the COVID-19 pandemic. The additional leased hard drives resulted in a higher balance of capital equipment and related lease liability, an increase in cash used in financing activities from principal payments, as well as a higher ongoing interest and depreciation expense related to these lease agreements. The semiconductor industry also experienced a global chip shortage due to the COVID-19 pandemic and various other factors. Current or future supply chain interruptions that could be exacerbated by global political tensions, such as the Russia-Ukraine and Israel-Hamas hostilities, or tensions between Taiwan and China, particularly if those tensions escalate into an armed conflict or directly or indirectly involve other countries, including the United States, that could disrupt the global supply chain and result in the implementation of trade barriers, including boycotts or the use of economic sanctions and export control restrictions, any of which could negatively impact our ability to acquire hard drives and semiconductors. In addition, our business could be harmed in the event of any industry consolidations, acquisitions or other restructuring events. For example, in September 2023, Toshiba Corp., one of our hard drive suppliers, announced the completion of a buy-out by various private equity firms and others. Also, in October 2023, Western Digital, another one of our hard drive suppliers, announced that it would spin-out its hard drive and other selected businesses into a separate company. Any shortage of key components, including hard drives, could materially and adversely affect our ability to provide our cloud services, as well as negatively impact our financial results by increasing our costs, lease liabilities, interest and depreciation expenses, and inventory levels. Shortages or pricing fluctuations could be material in the future. In the event of a shortage, supply interruption, material pricing change or other significant events involving one of our suppliers, we may be unable to develop alternate sources in a timely manner or at all. For example, a third party vendor that operated one of our multiple data center locations, filed for bankruptcy under Chapter 11 under the United States Bankruptcy Code in 2022. This bankruptcy matter was resolved without disruption to normal operations, but future bankruptcies or similar actions affecting our third-party hosted data center providers could result in disruptions to the company, and access to customer data may become unavailable or customer data could be lost, and it may take a significant period of time to achieve full resumption of our cloud services. Developing alternate sources of supply for these infrastructure needs, and transitioning our customers’ data from one provider to another, may result in loss of availability of our services for a period of time, be time-consuming, costly, difficult, and increase the risk of damage and loss. We may also be unable to source them on terms that are acceptable to us, or at all, which may undermine our ability to operate or scale our platform and harm our business.

Our business depends, in part, on the success of our strategic relationships with third parties.

To maintain and grow our business, we anticipate that we will continue to depend on relationships with third parties, such as channel partners and integrators, which are becoming an increasingly important part of our business and our sales and marketing strategy. Identifying partners and negotiating and building relationships with them requires significant time and resources. Our competitors may be effective in providing incentives to third parties to favor their services over us. In addition, any industry consolidation of such partners or integrators by our competitors or others could result in a decrease in the number of our current and potential customers, as these partners or integrators may no longer facilitate the adoption of our applications by potential customers. Interoperability between our platform and other third-party platforms is also important to our business. Further, some of our partners or integrators are or may become competitive with certain aspects of our cloud services and may elect to no longer integrate with, or support, our platform and cloud services. If we are unsuccessful in establishing or maintaining our relationships with such third parties and maintaining interoperability, our ability

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to compete in the marketplace or to grow our revenue could be impaired, and our business may suffer. Even if we are successful, we cannot assure you that these relationships will result in increased customer usage of our cloud services or increased revenue.

Our business is exposed to risks associated with online payment processing methods.

Many of our customers pay for our cloud services and products using credit cards. We rely on internal systems as well as those of third parties, including Stripe, to process payments. Acceptance and processing of these payment methods are subject to certain rules and regulations and require payment of interchange and other fees. To the extent there are increases in payment processing fees, material changes in the payment ecosystem, such as large re-issuances of payment cards, delays in receiving payments from payment processors, changes to rules or regulations concerning payment processing, loss of payment partners, and/or disruptions or failures in our payment processing systems or payment products, including products we use to update payment information, our revenue, operating expenses, and results of operation could be adversely impacted. For example, in response to the Russian attack on Ukraine that began in February 2022, the United States and many other countries began imposing sanctions on Russia and certain other regions, including goods and services imported and exported to Russia and certain other regions. In addition, various banking institutions and companies, including Stripe and credit card companies, began prohibiting any payments from persons located in Russia, which impacts our ability to receive payments from, and transact certain types of business operations with, our customers, and potential new customers, that are located in those regions. Although we do not have a significant number of customers located in those regions, such actions will have some impact on our business. It is also difficult to predict how long the conflict may last, how the conflict could escalate, and how the sanctions may evolve, which could cause a greater adverse impact on our business and operations than we expect.

We rely on third-party software for certain essential financial and operational services, and a failure or disruption in these services could materially and adversely affect our ability to manage our business effectively.

We rely on third-party software to provide many essential financial and operational services to support our business, including HubSpot, NetSuite, FireHydrant, and Zendesk. Some of these vendors are less established and have shorter operating histories than traditional software vendors. Moreover, many of these vendors provide their services to us via a cloud-based model instead of software that is installed on our premises. As a result, we depend upon these vendors to provide us with services that are always available and are free of errors or defects that could cause disruptions in our business processes. Any failure by these vendors to do so, or any disruption in our ability to access the internet, would materially and adversely affect our ability to manage our operations, disrupt the delivery of our cloud services to customers, and affect other areas such as our ability to timely provide required financial reporting.

We are a smaller reporting company, and any decision on our part to comply only with reduced reporting and disclosure requirements applicable to such companies could make our ordinary shares less attractive to investors.

As of June 30, 2023, we qualified as a “smaller reporting company,” as defined in the Exchange Act. For as long as we continue to be a smaller reporting company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public companies that are not smaller reporting companies, including, but not limited to, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements and only being required to provide two years of audited financial statements in annual reports.

We will remain a smaller reporting company so long as, as of June 30th of the preceding year, (i) the market value of our common shares held by non-affiliates, or our public float, is less than $250.0 million; or (ii) we have annual revenues less than $100.0 million and either we have no public float or our public float is less than $700.0 million.

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If we take advantage of some or all of the reduced disclosure requirements available to smaller reporting companies, investors may find our Class A common stock less attractive, which may result in a less active trading market for our Class A common stock and greater stock price volatility. For example, for so long as we are a smaller reporting company and not classified as an “accelerated filer” or “large accelerated filer” pursuant to SEC rules, we will be exempt from the auditor attestation requirements of Section 404(b) of the Sarbanes-Oxley Act.

Risks Related to Accounting and Tax Matters

We have identified material weaknesses in our internal controls over financial reporting, and the failure to achieve and maintain effective internal controls over financial reporting could harm our business and negatively impact the value of our Class A common stock.

We have identified material weaknesses in our internal controls over financial reporting, and if we are not able to effectively remediate our outstanding material weaknesses or are otherwise unable to maintain an effective system of internal controls over financial reporting, we may not be able to accurately report our financial results or timely file our periodic reports. As a result, investors may lose confidence in the accuracy and completeness of our financial reports, and the market price of our Class A common stock may be materially impacted.

Our management determined that as of December 31, 2023 we did not maintain effective internal controls over financial reporting, and as of September 30, 2024, we had two outstanding material weaknesses, specifically related to control activities, as follows. We completed our remediation plan for both material weaknesses noted below and believe our controls are appropriately designed. Once operating effectiveness has been demonstrated for a sufficient period of time, we expect our outstanding material weaknesses to be fully remediated.

We have dedicated significant effort and resources towards measures to remediate the identified material weaknesses (see Part 1, Item 4. Controls and Procedures included elsewhere in this Quarterly Report on Form 10-Q for additional information regarding remediation efforts). We are in the process of designing and implementing internal controls intended to address our outstanding material weaknesses, and are also testing the operating effectiveness of these controls. The outstanding material weaknesses cannot be considered fully remediated until the applicable controls operate for a sufficient period of time and management has concluded, through testing, that these controls are operating effectively.

We cannot assure you that the measures we have taken to date will be sufficient to remediate the outstanding material weaknesses we identified or prevent additional material weaknesses in the future. Although we plan to complete this remediation, if the steps we take do not remediate these material weaknesses in a timely or sufficient manner, there could continue to be a reasonable possibility that these control deficiencies could result in a material misstatement of our annual or interim financial statements that would not be prevented or detected on a timely basis.

Our independent registered public accounting firm is not required to formally attest to the effectiveness of our internal controls over financial reporting until after we are no longer an “emerging growth company” as defined in the JOBS Act. At such time, our independent registered public accounting firm may issue a report that is adverse in the event it is not satisfied with the level at which our internal controls over financial reporting is documented, designed, or operating. Any failure to maintain effective disclosure controls and internal controls over financial reporting could materially and adversely affect our business, results of operations, and financial condition and could cause a decline in the trading price of our Class A common stock.

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If we fail to maintain an effective system of disclosure controls and internal control over financial reporting, we may be unable to produce timely and accurate financial statements or comply with applicable regulations, which could negatively impact the price of our Class A common stock.

As a public company, we are subject to the reporting requirements of the Exchange Act, as amended (the Exchange Act), the Sarbanes-Oxley Act, and the rules and regulations of the Nasdaq Global Market. We expect that the requirements of these rules and regulations will continue to increase our legal, accounting, and financial compliance costs, make some activities more difficult, time-consuming, and costly, and place significant strain on our personnel, systems, and resources. The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures and internal controls over financial reporting. We are continuing to develop and refine our disclosure controls and other procedures and internal controls over financial reporting and expect that we will need to continue to expend significant resources, including accounting-related costs, and significant management oversight, to meet such requirements. However, our current controls and any new controls that we develop may not be adequate, and weaknesses in our disclosure controls may be discovered in the future. Additionally, we have identified material weaknesses in our internal controls over financial reporting, and such weaknesses may be discovered in the future. See “-We have identified material weaknesses in our internal controls over financial reporting, and the failure to achieve and maintain effective internal controls over financial reporting could harm our business and negatively impact the value of our Class A common stock.” Any failure to develop or maintain effective controls or any difficulties encountered in their implementation or improvement could harm our results of operations or cause us to fail to meet our reporting obligations and may result in a restatement of our financial statements for prior periods. Any failure to implement and maintain effective internal controls over financial reporting also could adversely affect the results of periodic management evaluations and annual independent registered public accounting firm attestation reports regarding the effectiveness of our internal controls over financial reporting that we will eventually be required to include in our periodic reports that will be filed with the SEC. Ineffective disclosure controls and procedures and internal controls over financial reporting could also cause investors to lose confidence in our reported financial and other information, which would likely have a negative effect on the trading price of our Class A common stock.

Because we recognize revenue from our subscription services over the term of the subscription, downturns or upturns in new business may not be immediately reflected in our operating results.

We generally recognize revenue from customers of our subscription agreements related to data backup services ratably over the terms of their subscription agreements, a majority of which are one or two-year agreements. Accordingly, the corresponding revenue we report in each quarter from such arrangements is the result of subscription agreements entered into during previous quarters. Consequently, a decline in new or renewed subscriptions in any one quarter may only be partially reflected in our revenue results for that quarter. However, any such decline will negatively affect our revenue in future quarters. Accordingly, the effect of significant downturns in sales and market acceptance of our cloud services, and potential changes in our retention rate may not be fully reflected in our operating results until future periods. This subscription model also makes it difficult for us to rapidly increase our revenue through additional subscription sales in any period as part of new growth initiatives or otherwise, as revenue from new customers must be recognized over the applicable subscription term.

Our operating results may be harmed if we are required to collect sales or other related taxes for our cloud services in jurisdictions where we have not historically done so.

We collect sales and value-added tax in connection with our cloud services in a number of jurisdictions. One or more states or countries may seek to impose incremental or new sales, use, or other tax collection obligations on us, including for past sales by us or our resellers and other partners. Online sellers can be required to collect sales and use tax despite not having a physical presence in the buyer’s state. A successful assertion by a state, country, or other jurisdiction that we should have been or should be collecting additional sales, use, or other taxes on our

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cloud services could, among other things, result in substantial tax liabilities for past sales, create significant administrative burdens for us, discourage users from purchasing our platform, or otherwise harm our business, results of operations, and financial condition.

Our ability to use our net operating loss carryforwards and certain other tax attributes may be limited.

As of December 31, 2023, we had net operating loss carryforwards for U.S. federal income tax purposes of $91.4 million available to offset future U.S. federal taxable income. Also, as of December 31, 2023, we had net operating loss carryforwards for state income tax purposes of $66.0 million available to offset future state taxable income. If not utilized, both the federal and state tax credit carryforwards will begin to expire in 2027.

Utilization of our net operating loss carryforwards and other tax attributes, such as research and development tax credits, may be subject to annual limitations, or could be subject to other limitations on utilization or benefit due to the ownership change limitations provided by Sections 382 and 383 of the Internal Revenue Code of 1986, as amended (the Code), and other similar provisions. Under Sections 382 and 383 of the Code, if a corporation undergoes an “ownership change,” our ability to use pre-change net operating loss carryforwards and other pre-change attributes, such as research tax credits, to offset post-change income may be limited. Similar rules may apply under state tax laws. We have performed a Section 382 analysis through December 31, 2022. At this time, we have not finalized a study through December 31, 2023 to assess whether such an ownership change has occurred, or whether there have been multiple ownership changes since our formation. We may experience ownership changes in the future as a result of subsequent changes in our stock ownership, some of which may be outside our control. Accordingly, our ability to utilize the aforementioned carryforwards may be limited.

Changes in tax laws could materially affect our financial condition, results of operations and cash flows.

We are unable to predict what changes to the tax laws of the U.S. and other jurisdictions may be proposed or enacted in the future or what effect such changes would have on our business. Any significant increase in our future effective tax rate could have a material adverse impact on our business, financial condition, results of operations, or cash flows.

The rules dealing with U.S. federal, state and local income taxation are constantly under review by persons involved in the legislative process and by the Internal Revenue Service and the U.S. Treasury Department. Changes to tax laws (which changes may have retroactive application) could adversely affect us or holders of our common stock. For example, under Section 174 of the Code, in taxable years beginning after December 31, 2021, expenses that are incurred for research and development in the U.S. will be capitalized and amortized, which may have an adverse effect on our cash flow. In recent years, many such changes have been made, and changes are likely to continue to occur in the future. It cannot be predicted whether, when, in what form or with what effective dates tax laws, regulations and rulings may be enacted, promulgated or issued, which could result in an increase in our or our shareholders’ tax liability or require changes in the manner in which we operate in order to minimize or mitigate any adverse effects of changes in tax law.

If our estimates or judgments relating to our critical accounting policies prove to be incorrect, our results of operations could be adversely affected.

The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying notes appearing elsewhere in this Quarterly Report on Form 10-Q or in our most recent Annual Report on Form 10-K. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, as provided in the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations-Critical Accounting Estimates.” The results of these estimates form the basis for making judgments about the carrying values of assets, liabilities, and equity, and the amount of revenue and expenses that are not readily apparent from other

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sources. Significant estimates and assumptions involve those related to costs to be capitalized as internal-use software, which include determining whether projects will result in new or additional functionality and those related to the valuation of our Employee Stock Purchase Plan expense. Our results of operations may be adversely affected if our assumptions change or if actual circumstances differ from those in our assumptions.

Risks Related to Intellectual Property

Assertions by a third party that our cloud services infringe, misappropriate, or otherwise violate their intellectual property could subject us to costly and time-consuming litigation and adversely impact our business.

There is frequent litigation in the software and technology industries based on allegations of infringement, misappropriation, or other violations of intellectual property rights. Some software and technology companies, including some of our competitors, as well as non-practicing entities, own patents, trademarks, copyrights and other intellectual property rights that they may use to assert claims against us. In our case, third parties have asserted, and may in the future assert, that we have infringed, misappropriated, or otherwise violated their patents or other intellectual property rights. For example, we have faced patent infringement claims from other non-practicing entities in the past. There may be intellectual property rights held by others, including issued or pending patents, that cover significant aspects of our technologies or solutions, and we cannot assure you that we are not infringing, misappropriating, or violating, and have not infringed, misappropriated, or violated, any third-party intellectual property rights or that we will not be held to have done so or be accused of doing so in the future. In addition, as we face increasing competition and become increasingly visible as a publicly-traded company, or if we become more successful, the possibility of new third-party claims may increase.

Any claim that we have violated intellectual property or other proprietary rights of third parties, with or without merit, could be time-consuming and costly to address and resolve, could divert the time and attention of management and technical personnel from our business, could place limitations on our ability to use our current websites and technologies, and could result in an inability to market or provide all or a portion of our cloud services. Furthermore, we could be required to pay substantial monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a party’s intellectual property rights. We may also be required to enter into a royalty or licensing agreement that could include significant upfront and future licensing fees or expend significant resources to redesign our technologies or solutions, which efforts may not be timely or prove successful at all and require us to indemnify customers or other third parties. Royalty or licensing agreements may be unavailable on terms acceptable to us, or at all. If we cannot develop or license technology for any allegedly infringing aspect of our business, we could be forced to limit our cloud services and may be unable to compete effectively. Any of these events could have a material adverse effect on our business.

If we are unable to adequately establish, maintain, protect, and enforce our intellectual property and proprietary rights, our reputation may be harmed, we may be subject to litigation, and our business may be adversely affected.

Our future success and competitive position depend in large part on our ability to establish, maintain, protect, and enforce our intellectual property and proprietary rights. We do not own any issued patents and rely on a combination of trademark, copyright, and trade secret laws, as well as confidentiality procedures and contractual restrictions, to establish and protect our proprietary rights, all of which provide only limited protection and may not now or in the future provide us with a competitive advantage. The steps we have taken and will take may not prevent unauthorized use, reverse engineering, or misappropriation of our technologies and we may be unable to detect any of the foregoing. Furthermore, effective trademark, copyright, and trade secret protection may not be available in every country in which our cloud services are available. Our lack of patent protection may restrict our ability to protect our technologies and processes from competition. Defending and enforcing our intellectual property rights may result in litigation, which can be costly and divert management attention and resources. If our efforts to protect our technologies and intellectual property are inadequate, the value of our brand and other

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intangible assets may be diminished and competitors may be able to mimic our cloud services. Any of these events could have a material adverse effect on our business.

With respect to our technology platform, we consider trade secrets and know-how to be one of our primary sources of intellectual property. However, trade secrets and know-how can be difficult to protect. The use of generative artificial intelligence tools could also expose us to inadvertently disclosing trade secrets or other confidential information or inadvertently cause us to violate third party intellectual property rights. We seek to protect these trade secrets and other proprietary technology, in part, by internal controls and policies as well as entering into non-disclosure and confidentiality agreements with parties who have access to them, such as our employees, outside contractors, consultants, advisors, and other third parties. We also enter into confidentiality and invention assignment agreements with our employees and consultants. The confidentiality agreements are designed to protect our proprietary information and, in the case of agreements or clauses containing invention assignment, to grant us ownership of technologies that are developed through a relationship with employees or third parties. We cannot guarantee that we have entered into such agreements with each party that may have or has had access to our trade secrets or proprietary information, including our technology and processes. Despite these efforts, no assurance can be given that the confidentiality agreements we enter into or our other internal controls and policies will be effective in controlling access to such proprietary information and trade secrets. The confidentiality agreements on which we rely to protect certain technologies may be breached, and these and other actions that we take may not be adequate to protect our confidential information, trade secrets, and proprietary technologies and may not provide an adequate remedy in the event of unauthorized use or disclosure of our confidential information, trade secrets or proprietary technology. Further, these actions do not prevent our competitors or others from independently developing the same or similar technologies and processes, which may allow them to provide a service similar or superior to ours, which could harm our competitive position.

Our use of “open-source” software could negatively affect our ability to sell our cloud services and subject us to possible litigation.

A portion of the technologies used by us incorporates “open-source” software, and we may incorporate open-source software in the future. Such open-source software is generally licensed by its authors or other third parties under open-source licenses. Companies that incorporate open-source software into their solutions have, from time to time, faced claims challenging the use of open-source software and compliance with open-source license terms. These licenses may subject us to certain unfavorable conditions, including requirements that we offer all or parts of our technology or services that incorporate the open-source software at no cost, that we make publicly available source code for modifications or derivative works we create based upon, incorporating, or using the open-source software, and/or that we license such modifications or derivative works under the terms of the particular open-source licensor other license granting third parties certain rights of further use. Although we monitor our use of open-source software, we cannot assure you that all open-source software is reviewed prior to use in our cloud services, that our developers have not incorporated open-source software into our technology platform or services, or that they will not do so in the future. In the event that we become subject to such claims, we could be subject to significant damages, enjoined from the sale of our solutions that contained the open-source software, and required to comply with onerous conditions. In addition, the terms of open-source software licenses may require us to provide software that we develop using such open-source software to others on unfavorable license terms. As a result of our current or future use of open-source software, we may face claims or litigation, be required to release our proprietary source code, pay damages for breach of contract, re-engineer our solutions, discontinue making our solutions available in the event re-engineering cannot be accomplished on a timely basis or take other remedial action. Any such re-engineering or other remediation efforts could require significant additional research and development resources, and we may not be able to successfully complete any such re-engineering or other remediation efforts on a timely basis, or at all. Any of these risks could be difficult to eliminate or manage, and, if not addressed, could disrupt the distribution and sale of our solutions and have a material adverse effect on our business and operating results.

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Risks Related to Ownership of Our Class A Common Stock

Anti-takeover provisions contained in our Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws, as well as provisions of Delaware law, could impair a takeover attempt.

Our Amended and Restated Certificate of Incorporation, Amended and Restated Bylaws, and Delaware law contain provisions which could have the effect of rendering more difficult, delaying, or preventing an acquisition deemed undesirable by our Board of Directors. Among other things, our Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws include provisions:

These provisions, alone or together, could delay or prevent hostile takeovers and changes in control or changes in our management.

As a Delaware corporation, we are also subject to provisions of Delaware law, including Section 203 of the Delaware General Corporation law, which prevents certain stockholders holding more than 15% of our outstanding capital stock from engaging in certain business combinations without approval of the holders of at least two-thirds of our outstanding common stock not held by such stockholder. Any provision of our Amended and Restated Certificate of Incorporation, Amended and Restated Bylaws, or Delaware law that has the effect of delaying, preventing, or deterring a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our capital stock, and could also affect the price that some investors are willing to pay for our Class A common stock.

We may fail to meet our publicly announced guidance or other expectations about our business, which could cause our stock price to decline.

We may provide from time to time guidance regarding our expected financial and business performance, which may include projections regarding sales and production, as well as anticipated future revenues, gross margins, profitability, and cash flows. Correctly identifying key factors affecting business conditions and predicting future events is inherently an uncertain process, and our guidance may not ultimately be accurate and has in the past been inaccurate in certain respects, such as the timing of new products. Our guidance is based on certain assumptions such as those relating to anticipated production and sales, average sales prices, supplier and commodity costs, and planned cost reductions. If our guidance is not accurate or varies from actual results due to our inability to meet our assumptions or the impact on our financial performance that could occur as a result of various risks and uncertainties, the market value of our Class A common stock could decline significantly.

If securities or industry analysts do not publish or cease publishing research or reports about us, our business, our market, or our competitors, or if they adversely change their recommendations regarding our Class A common stock, the market price of our Class A common stock and trading volume could decline.

The trading market for our Class A common stock will be influenced by the research and reports that securities or industry analysts may publish about us, our business, our market, or our competitors. If any of the analysts

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who may cover us adversely change their recommendations regarding our Class A common stock or provide more favorable recommendations about our competitors, the market price of our Class A common stock would likely decline. If any of the analysts who may cover us were to cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause the market price of our Class A common stock or trading volume to decline.

We do not expect to declare any dividends in the foreseeable future.

We do not anticipate declaring any cash dividends to holders of our Class A common stock in the foreseeable future. Consequently, investors may need to rely on sales of our Class A common stock after price appreciation, which may never occur, as the only way to realize any future gains on their investment. Investors seeking cash dividends should not purchase shares of our Class A common stock.

Our Amended and Restated Certificate of Incorporation provides that the Court of Chancery of the State of Delaware and the federal district courts of the United States of America are the exclusive forums for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees.

Our Amended and Restated Certificate of Incorporation provides that the Court of Chancery of the State of Delaware and the federal district courts of the United States of America are the exclusive forum for substantially all disputes between us and our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers, or employees. Specifically, our Amended and Restated Certificate of Incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum provision for: (i) any derivative action or proceeding brought on behalf of us; (ii) any action asserting a claim of breach of a fiduciary duty; (iii) any action arising pursuant to any provision of the DGCL, our Amended and Restated Certificate of Incorporation or Amended and Restated Bylaws (as either may be amended from time to time); (iv) any action to interpret, apply, enforce, or determine the validity of our Amended and Restated Certificate of Incorporation or our Amended and Restated Bylaws; (v) any action asserting a claim against us that is governed by the internal affairs doctrine; or (vi) any action asserting an “internal corporate claim” as defined in the DGCL. These exclusive forum provisions would not apply to suits brought to enforce a duty or liability created by the Exchange Act.

Furthermore, Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all such Securities Act actions. Accordingly, both state and federal courts have jurisdiction to entertain such claims. To prevent having to litigate claims in multiple jurisdictions and the threat of inconsistent or contrary rulings by different courts, among other considerations, our Amended and Restated Certificate of Incorporation further provides that the U.S. federal district courts are the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. While the Delaware courts have determined that such choice of forum provisions are facially valid, a stockholder may nevertheless seek to bring a claim in a venue other than those designated in the exclusive forum provisions. In such instance, we would expect to vigorously assert the validity and enforceability of the exclusive forum provisions of our Amended and Restated Certificate of Incorporation. This may require significant additional costs associated with resolving such action in other jurisdictions and there can be no assurance that the provisions will be enforced by a court in those other jurisdictions.

These exclusive-forum provisions may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, or other employees. If a court were to find any of the exclusive forum provisions of our Amended and Restated Certificate of Incorporation to be inapplicable to or unenforceable in an action, we may incur further significant additional costs associated with resolving the dispute in other jurisdictions, all of which could seriously harm our business.

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The requirements of being a public company, particularly after we are no longer an “emerging growth company”, may strain our resources, require us to incur substantial costs and will require substantial management attention.

As a public company, and particularly after we cease to be an “emerging growth company”, we have incurred and will continue to incur substantial legal, accounting, and other expenses that we did not incur as a private company. For example, we are subject to the reporting requirements of the Exchange Act, the applicable requirements of the Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the rules and regulations of the SEC, and the listing standards of the NASDAQ Global Market. For example, the Exchange Act requires, among other things, we file annual, quarterly, and current reports with respect to our business, financial condition, and results of operations. Compliance with these rules and regulations has increased and will continue to increase our legal and financial compliance costs, and increase demand on our systems, particularly after we are no longer an emerging growth company. In addition, as a public company, we may be subject to stockholder activism, which can lead to additional substantial costs, distract management, and impact the manner in which we operate our business in ways we cannot currently anticipate. As a result of disclosure of information in filings required of a public company, our business and financial condition has become more visible, which may result in threatened or actual litigation, including by competitors.

Some members of our management team also have limited experience managing a publicly traded company, interacting with public company investors, and complying with the increasingly complex laws pertaining to public companies. Our management team may not successfully or efficiently manage our transition to being a public company subject to significant regulatory oversight and reporting obligations under the federal securities laws and the continuous scrutiny of securities analysts and investors. These new obligations and constituents will require significant attention from our senior management and could divert their attention away from the day-to-day management of our business, which could adversely affect our business, financial condition, and results of operations.

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USE OF PROCEEDS

We estimate that the net proceeds from this offering will be approximately $    million, or $    million if the underwriters exercise their option to purchase additional shares in full, after deducting underwriting discounts and commissions and estimated offering expenses payable by us based on the assumed public offering price of $    per share (the last reported sales price of our common stock on the Nasdaq Global Market on November  , 2024).

We currently intend to use the net proceeds received by us from this offering for general corporate purposes, including working capital, operating expenses, sales and marketing expenses to fund the growth of our business, research and development, and capital expenditures. In addition, we may use a portion of the net proceeds to acquire complementary businesses, products, services, or technologies. However, we have no current understandings, agreements, or commitments for any specific material acquisitions at this time. We cannot specify with certainty the particular uses of the net proceeds that we received from this offering. Accordingly, we will have broad discretion in using these proceeds.

Pending our use of the net proceeds from this offering, we plan to invest the net proceeds in a variety of capital preservation investments, including short-term interest-bearing investment-grade securities, certificates of deposit, or government securities.

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DIVIDEND POLICY

We have never declared or paid any cash dividends on our capital stock and we do not currently intend to pay any cash dividends on our capital stock for the foreseeable future. We currently intend to retain all available funds and any future earnings to support operations and to finance the growth and development of our business. Any future determination to pay dividends will be made at the discretion of our Board of Directors subject to applicable laws and will depend upon, among other factors, our results of operations, financial condition, contractual restrictions, and capital requirements. Our future ability to pay cash dividends on our capital stock may also be limited by the terms of any future debt or preferred securities or future credit facility. Our revolving credit agreement with City National Bank contains certain restrictive covenants that prevent us from paying cash dividends on our capital stock.

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CAPITALIZATION

The following table sets forth our capitalization as of September 30, 2024:

You should read this table in conjunction with the sections titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our financial statements and related notes appearing in our most recent Annual Report on Form 10-K and Quarterly Reports on Form 10-Q, which are incorporated by reference in this prospectus supplement and the accompanying prospectus.

The number of shares of our Class A common stock issued and outstanding as of September 30, 2024 as reported in the table above excludes:

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DILUTION

If you invest in our Class A common stock in this offering, your ownership interest will be immediately diluted to the extent of the difference between the public offering price per share of our Class A common stock and the net tangible book value per share of our Class A common stock immediately after this offering.

Our net tangible book value as of September 30, 2024 was approximately $(13.9) million, or $(0.31) per share of our Class A common stock. Net tangible book value per share is calculated by subtracting our total liabilities from our total tangible assets, which is total assets less goodwill and intangible assets, and dividing this amount by the number of shares of our Class A common stock outstanding.

After giving effect to the sale by us of    shares of our Class A common stock at the public offering price of $    per share, and after deducting the underwriting discounts and commissions and estimated offering expenses, our as adjusted net tangible book value as of September 30, 2024 would have been approximately $    million, or $    per share of our Class A common stock. This represents an immediate increase in the net tangible book value of $    per share to our existing stockholders and an immediate and substantial dilution in net tangible book value of $    per share to new investors.

The following table illustrates this dilution to new investors on a per share basis:

If the underwriters exercise in full their option to purchase up to    additional shares from us at the public offering price of $    per share, the as adjusted net tangible book value per share after this offering would be $ per share and the dilution to new investors participating in this offering would be $    per share.

The number of shares of our Class A common stock that will be outstanding after this offering is based on 44,265,173 shares of our Class A common stock outstanding as of September 30, 2024, and this amount excludes:

Except as otherwise indicated, all information in this prospectus supplement assumes no exercise or settlement of the outstanding stock options, restricted stock units or other equity awards described above and no exercise by the underwriters of their option to purchase additional shares.

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MATERIAL UNITED STATES FEDERAL INCOME TAX CONSEQUENCES FOR NON-U.S. HOLDERS OF OUR CLASS A COMMON STOCK

The following is a summary of certain material U.S. federal income tax considerations relating to ownership and disposition of our Class A common stock by a non-U.S. holder. For purposes of this discussion, the term “non-U.S. holder” means a beneficial owner (other than a partnership or other pass-through entity) of our Class A common stock that is not, for U.S. federal income tax purposes:

This discussion does not address the tax treatment of partnerships or other entities that are passthrough entities for U.S. federal income tax purposes or persons who hold their shares of our Class A common stock through partnerships or such other pass-through entities. A partner in a partnership or other pass-through entity that will hold our Class A common stock should consult his, her or its own tax advisor regarding the tax consequences of the ownership and disposition of our Class A common stock through a partnership or other pass-through entity, as applicable.

This discussion is based on current provisions of the Internal Revenue Code of 1986, or the Code, existing and proposed U.S. Treasury Regulations promulgated thereunder, current administrative rulings and judicial decisions, all as in effect as of the date of this prospectus supplement and all of which are subject to change or to differing interpretation, possibly with retroactive effect. Any change or differing interpretation could alter the tax consequences to non-U.S. holders described in this prospectus supplement. There can be no assurance that the Internal Revenue Service, or the IRS, will not challenge one or more of the tax consequences described in this prospectus supplement.

We assume in this discussion that each non-U.S. holder holds shares of our Class A common stock as a capital asset within the meaning of Section 1221 of the Code (generally, property held for investment). This discussion does not address all aspects of U.S. federal income taxation that may be relevant to a particular non-U.S. holder in light of that non-U.S. holder’s individual circumstances nor does it address any aspects of U.S. state, local or non-U.S. taxes, the alternative minimum tax, estate and gift tax or the Medicare tax on net investment income. This discussion also does not consider any specific facts or circumstances that may apply to a non-U.S. holder and does not address the special tax rules applicable to particular non-U.S. holders, such as:

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THIS DISCUSSION IS FOR INFORMATIONAL PURPOSES ONLY AND IS NOT, AND IS NOT INTENDED TO BE, LEGAL OR TAX ADVICE. PROSPECTIVE INVESTORS SHOULD CONSULT THEIR OWN TAX ADVISORS REGARDING THE U.S. FEDERAL, STATE, LOCAL, AND NON-U.S. INCOME, ESTATE AND OTHER TAX CONSIDERATIONS OF ACQUIRING, HOLDING AND DISPOSING OF OUR CLASS A COMMON STOCK.

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Distributions

If we make distributions in respect of our Class A common stock, those distributions generally will constitute dividends for U.S. federal income tax purposes to the extent paid from our current or accumulated earnings and profits, as determined under U.S. federal income tax principles. If a distribution exceeds our current and accumulated earnings and profits, the excess will be treated as a tax-free return of the non-U.S. holder’s investment, up to the holder’s tax basis in the Class A common stock. Any remaining excess will be treated as gain from the sale or exchange of our Class A common stock, subject to the tax treatment described below under the heading “Gain on Sale, Exchange or Other Taxable Disposition of Our Class A Common Stock.” Any distributions will also be subject to the discussions below under the headings “Information Reporting and Backup Withholding” and “FATCA.”

Except as described below, dividends paid to a non-U.S. holder generally will be subject to withholding of U.S. federal income tax at a 30% rate or such lower rate as may be specified by an applicable income tax treaty.

Dividends that are treated as effectively connected with a trade or business conducted by a non-U.S. holder within the United States, and, if an applicable income tax treaty so provides, that are attributable to a permanent establishment or a fixed base maintained by the non-U.S. holder within the United States, are generally exempt from the 30% withholding tax if the non-U.S. holder satisfies applicable certification and disclosure requirements (generally including provision of a valid IRS Form W-8ECI (or applicable successor form) certifying that the dividends are effectively connected with the non-U.S. holder’s conduct of a trade or business within the United States). However, such U.S. effectively connected income is taxed on a net income basis at the same U.S. federal income tax rates applicable to United States persons (as defined in the Code). Any U.S. effectively connected income received by a non-U.S. holder that is classified as a corporation for U.S. federal income tax purposes may also, under certain circumstances, be subject to an additional “branch profits tax” at a 30% rate or such lower rate as may be specified by an applicable income tax treaty between the United States and such holder’s country of residence.

A non-U.S. holder of our Class A common stock who claims the benefit of an applicable income tax treaty between the United States and such holder’s country of residence generally will be required to provide a properly executed IRS Form W-8BEN or W-8BEN-E (or successor form) and satisfy applicable certification and other requirements. A non-U.S. holder that is eligible for a reduced rate of U.S. withholding tax under an income tax treaty may obtain a refund or credit of any excess amounts withheld by timely filing an appropriate claim with the IRS. Non-U.S. holders are urged to consult their own tax advisors regarding their entitlement to benefits under a relevant income tax treaty and the specific methods available to them to satisfy these requirements.

Gain on Sale, Exchange or Other Taxable Disposition of Our Class A Common Stock

Subject to the discussions below under “Information Reporting and Backup Withholding” and “FATCA,” a non-U.S. holder generally will not be subject to U.S. federal income tax on any gain realized upon such non-U.S. holder’s sale, exchange or other disposition of our Class A common stock unless:

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Information Reporting and Backup Withholding

We must report annually to the IRS and to each non-U.S. holder the gross amount of the distributions on our Class A common stock paid to such holder and the tax withheld, if any, with respect to such distributions. Non-U.S. holders may have to comply with specific certification procedures to establish that the holder is not a United States person (as defined in the Code) in order to avoid backup withholding at the applicable rate with respect to dividends on our Class A common stock. Generally, a non-U.S. holder will comply with such procedures if it provides a properly executed IRS Form W-8BEN or W-8BEN-E (or other applicable Form W-8), or otherwise meets documentary evidence requirements for establishing that it is a non-U.S. holder, or otherwise establishes an exemption. Dividends paid to non-U.S. holders subject to withholding of U.S. federal income tax, as described above under the heading “Distributions,” will generally be exempt from U.S. backup withholding if the non-U.S. holders satisfy the certification procedures described in the preceding two sentences.

Information reporting and backup withholding generally will apply to the proceeds of a disposition of our Class A common stock by a non-U.S. holder effected by or through the U.S. office of any broker, U.S. or non-U.S., unless the holder certifies its status as a non-U.S. holder and satisfies certain other requirements, or otherwise establishes an exemption. Generally, information reporting and backup withholding will not apply to a payment of disposition proceeds to a non-U.S. holder where the transaction is effected outside the United States through a non-U.S. office of a broker. However, for information reporting purposes, dispositions effected through a non-U.S. office of a broker with substantial U.S. ownership or operations generally will be treated in a manner similar to dispositions effected through a U.S. office of a broker. Non-U.S. holders should consult their own tax advisors regarding the application of the information reporting and backup withholding rules to them.

Copies of information returns may be made available to the tax authorities of the country in which the non-U.S. holder resides or is incorporated under the provisions of a specific treaty or agreement.

Backup withholding is not an additional tax. Rather, any amounts withheld under the backup withholding rules from a payment to a non-U.S. holder can be refunded or credited against the non-U.S. holder’s U.S. federal income tax liability, if any, provided that an appropriate claim is timely filed with the IRS.

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FATCA

Provisions of the Code commonly referred to as the Foreign Account Tax Compliance Act, or FATCA, generally impose a 30% withholding tax on dividends on, and gross proceeds from the sale or other disposition of, our Class A common stock if paid to a foreign entity unless (1) if the foreign entity is a “foreign financial institution,” the foreign entity undertakes certain due diligence, reporting, withholding, and certification obligations, (2) if the foreign entity is not a “foreign financial institution,” the foreign entity identifies certain of its U.S. investors, or (3) the foreign entity is otherwise excepted under FATCA. Under certain circumstances, a non-U.S. holder might be eligible for refunds or credits of such taxes.

Under proposed U.S. Treasury Regulations, FACTA withholding on gross proceeds from the sale or other disposition of our Class A common stock would not currently apply. Although such regulations are not final, applicable withholding agents may rely on the proposed regulations until final regulations are issued. However, there can be no assurance that final Treasury Regulations will provide the same exceptions from FATCA withholding as the proposed Treasury Regulations. Non-U.S. holders should consult their tax advisors regarding the effects of FATCA on their investment in our common stock.

An intergovernmental agreement between the United States and an applicable foreign country may modify the requirements described in this section. Non-U.S. holders should consult their own tax advisors regarding the possible implications of FATCA on their investment in our Class A common stock and the entities through which they hold our Class A common stock.

The preceding discussion of material U.S. federal tax considerations is for informational purposes only. It is not legal or tax advice. Prospective investors should consult their own tax advisors regarding the particular U.S. federal, state, local, and non-U.S. tax consequences of purchasing, holding and disposing of our Class A common stock, including the consequences of any proposed changes in applicable laws.

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UNDERWRITING

We entered into an underwriting agreement with the underwriters named below dated the date of this prospectus supplement. Oppenheimer & Co. Inc. and Needham & Company, LLC are acting as joint book-running managers and representatives of the underwriters. The underwriting agreement provides for the purchase of a specific number of shares of Class A common stock by each of the underwriters. The underwriters’ obligations are several, which means that each underwriter is required to purchase a specified number of shares of Class A common stock, but is not responsible for the commitment of any other underwriter to purchase shares of Class A common stock. Subject to the terms and conditions of the underwriting agreement, each underwriter has severally and not jointly agreed to purchase the number of shares of Class A common stock set forth opposite its name below:

Subject to the terms and conditions set forth in the underwriting agreement, the underwriters have agreed, severally and not jointly, to purchase all of the shares offered by this prospectus supplement (other than those covered by the option described below), if any are purchased.

The shares of Class A common stock offered hereby are expected to be ready for delivery on or about     , 2024 against payment in immediately available funds.

The underwriters are offering the shares of Class A common stock subject to various conditions and may reject all or part of any order. The representatives of the underwriters have advised us that the underwriters propose initially to offer the shares of Class A common stock to the public at the public offering price set forth on the cover page of this prospectus supplement and to dealers at a price less a concession not in excess of $     per share of Class A common stock to brokers and dealers. After the shares of Class A common stock are released for sale to the public, the representatives may change the offering price, the concession, and other selling terms at various times.

We have granted the underwriters an option to purchase additional shares. This option, which is exercisable for up to 30 days after the date of this prospectus supplement, permits the underwriters to purchase a maximum of additional shares of Class A common stock from us. If the underwriters exercise all or part of this option, they will purchase shares of Class A common stock covered by the option at the public offering price that appears on the cover page of this prospectus supplement, less the underwriting discounts and commissions. The underwriters have severally agreed that, to the extent the option is exercised, they will each purchase a number of additional shares proportionate to such underwriter’s initial amount reflected in the foregoing table.

The following table provides information regarding the amount of the discounts and commissions to be paid to the underwriters by us, before expenses:

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We estimate that our total expenses of the offering, excluding the estimated underwriting discounts and commissions, will be approximately $    . We have agreed to reimburse the underwriters for all of our costs and expenses incident to the offering and the performance of our obligations pursuant to the engagement of the underwriters, all reasonable out-of-pocket costs and expenses incident to the performance of the obligations of the representatives under the underwriting agreement (including, without limitation, the fees and expenses of the underwriters’ outside attorneys and expenses related to blue sky and FINRA filings), provided that such costs and expenses shall not exceed $     without our prior approval (such approval not to be unreasonably withheld, conditioned or delayed).

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended.

We have agreed with the underwriters, without the prior written consent of Oppenheimer & Co. Inc. and Needham & Company, LLC, for a period of 60 days after the date of this prospectus supplement, not to (1) offer, pledge, issue, sell, contract to sell, register with the SEC (other than on Form S-8 or on any successor form), sell any option, right or warrant to purchase, lend or otherwise transfer or dispose of, directly or indirectly, any of our equity securities (or any securities convertible into, exercisable for or exchangeable for our equity securities), or (2) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the equity securities or such other securities, in case or otherwise, except for (i) the issuance of the shares of Class A common stock pursuant to the registration statement of which this prospectus supplement forms a part, (ii) issue shares of Class A common stock upon the exercise (including “net” or “cashless” exercise) of an option or warrant, vesting or settlement (including “net” settlement) of a restricted stock unit, or the exercise, conversion, exchange or reclassification of a security outstanding on the date hereof, provided that such option, warrant, restricted stock unit or security as described the registration statement of which this prospectus supplement forms a part, (iii) grant options to purchase, restricted stock units or the issuance of shares of Class A common stock or any securities convertible into, exchangeable for or that represent the right to receive shares of Class A common stock, in each case pursuant to our equity compensation plans as described in the registration statement of which this prospectus supplement forms a part, (iv) the entry into an agreement providing for the issuance by us of shares or any security convertible into or exercisable for shares in connection with the acquisition by us of the securities, business, technology, property or other assets of another person or entity or pursuant to an employee benefit plan assumed by us in connection with such acquisition, and the issuance of any such securities pursuant to any such agreement, representing in the aggregate no more than 5% of our issued and outstanding shares of Class A common stock as of the date of this prospectus supplement, which may be sold on an arm’s-length basis, only to unaffiliated third-parties, so long as recipients of such securities agree to be bound by a lock-up agreement and (v) the entry into any agreement providing for the issuance of shares or any security convertible into or exercisable for shares in connection with joint ventures, commercial relationships or other strategic transactions, and the issuance of any such securities pursuant to any such agreement, representing in the aggregate no more than 5% of our issued and outstanding shares of Class A common stock as of the date of this prospectus supplement, which may be sold on an arm’s-length basis, only to unaffiliated third-parties, so long as recipients of such securities agree to be bound by a lock-up agreement.

Our directors and officers have agreed with the underwriters, without the prior written consent of Oppenheimer & Co. Inc. and Needham and Company, LLC, during the period from the date of this prospectus supplement continuing through the date 60 days after the date of this prospectus supplement (the “Lock-Up Period”), not to directly or indirectly (1) offer, pledge, assign, encumber, announce the intention to sell, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, any shares of Class A common stock or any securities convertible into or exercisable or exchangeable for Class A common stock owned either of record or

beneficially (as defined in the Exchange Act) by the lock-up signatory on the date of this prospectus supplement

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or thereafter acquired, (2) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the Class A common stock or any securities convertible into or exercisable or exchangeable for Class A common stock, whether any such transaction described in clause (1) or (2) above is to be settled by delivery of Class A common stock or such other securities, in cash or otherwise, or publicly announce an intention to do any of the foregoing, and (3) make any demand for or exercise any right with respect to, the registration of any shares of Class A common stock or any security convertible into or exercisable or exchangeable for Class A common stock.

Notwithstanding the foregoing, the lock-up signatory may transfer shares of Class A common stock without the prior written consent of Oppenheimer & Co. Inc. and Needham & Company, LLC, provided that (1) in the cases of clauses (i) through (vi), (ix) and (x) below, Oppenheimer & Co. Inc. and Needham & Company, LLC receive a signed lock-up agreement for the balance of the Lock-Up Period from each donee, trustee, distributee, or transferee, as the case may be, (2) in the cases of clauses (i) through (v) below, any such transfer shall not involve a disposition for value, (3) in the cases of clauses (i) through (iv) below, such transfers are not required to be reported with the SEC on Form 4 in accordance with Section 16 of the Exchange Act, (4) in the cases of clauses (v) through (ix) below, any filing under Section 16 of the Exchange Act made during the Lock-Up Period shall clearly indicate in the footnotes thereto the circumstances of and the reason for the transfer, (5) in the cases of clauses (vii) and (viii) below, any filing under Section 16 of the Exchange Act made during the Lock-Up Period shall clearly indicate in the footnotes thereto that the disposition was solely to us and (6) the lock-up signatory does not otherwise voluntarily effect any public filing or report regarding such transfers during the Lock-Up Period:

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Furthermore, the lock-up signatory may sell shares of Class A common stock purchased by such lock-up signatory from the underwriters in this offering or on the open market following this offering if and only if (i) such sales are not required to be reported in any public report or filing with the SEC, or otherwise and (ii) such signatory does not otherwise voluntarily effect any public filing or report regarding such sales during the Lock-Up Period.

For the avoidance of doubt, nothing shall prevent the lock-up signatory from, or restrict the ability of such lock-up signatory to, (i) purchase shares of Class A common stock on the open market or (ii) exercise any options or other convertible securities granted under any of our benefit plans.

Notwithstanding anything herein to the contrary, the lock-up signatory may establish a 10b5-l trading plan that complies with Rule 10b5-l under the Exchange Act (“10b5-l Trading Plan”) or amend an existing 10b5-l Trading Plan (subject to compliance with our insider trading policy) so long as there are no sales of such signatory’s Class A common stock or shares of Class A common stock underlying lock-up securities under such plan during the Lock-Up Period; and provided that the establishment of a 10b5-1 Trading Plan or the amendment of a 10b5-l Trading Plan, in either case, providing for sales of such signatory’s Class A common stock or shares of Class A common stock underlying lock-up securities shall only be permitted if (i) the establishment or amendment of such plan is not required to be reported in any public report or filing with the SEC or otherwise during the Lock-Up Period, and (ii) the lock-up signatory does not otherwise voluntarily effect any public filing or report regarding the establishment or amendment of such plan during the Lock-Up Period, provided, however, that such signatory shall be permitted to reference in a required Section 16 filing that any such sale was effected pursuant to a 10b5-1 Trading Plan. Notwithstanding the foregoing, the lock-up signatory may sell shares of Class A common stock pursuant to a 10b5-1 Trading Plan during the Lock-Up Period; provided that such plan was established by the lock-up signatory prior to the date of this prospectus supplement; provided further that any required Section 16 filing that is made in connection with any such sales during the Lock-Up Period shall state that such sales have been executed under a 10b5-1 Trading Plan and shall also state the date such 10b5-1 Trading Plan was adopted.

Rules of the SEC may limit the ability of the underwriters to bid for or purchase shares of common stock before the distribution of the shares is completed. However, the underwriters may engage in the following activities in accordance with the rules:

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Similar to other purchase transactions, the underwriters’ purchases to cover the syndicate short sales or to stabilize the market price of our Class A common stock may have the effect of raising or maintaining the market price of our Class A common stock or preventing or mitigating a decline in the market price of our Class A common stock. As a result, the price of our Class A common stock may be higher than the price that might otherwise exist in the open market. The imposition of a penalty bid might also have an effect on the price of the Class A common stock if it discourages resales of our shares of Class A common stock.

Neither we nor the underwriters make any representation or prediction as to the effect that the transactions described above may have on the price of our Class A common stock. These transactions may occur on the Nasdaq Global Market or otherwise. If such transactions are commenced, they may be discontinued without notice at any time.

The underwriters and certain of their affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities. Some of the underwriters and certain of their affiliates may in the future engage in investment banking and other commercial dealings in the ordinary course of business with us and our affiliates, for which they may in the future receive customary fees, commissions and expenses.

In addition, in the ordinary course of their business activities, the underwriters and their affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates. The underwriters and their affiliates may also make investment recommendations and/or publish or express independent research views in respect of such securities or financial instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

Electronic Delivery of Prospectus supplement: A prospectus supplement in electronic format may be delivered to potential investors by one or more of the underwriters participating in this offering. The prospectus supplement in electronic format will be identical to the paper version of such prospectus supplement. Other than the prospectus supplement in electronic format, the information on any underwriter’s website and any information contained in any other website maintained by an underwriter is not part of this prospectus supplement or the registration statement of which this prospectus supplement forms a part.

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Exchange Listing

Our Class A common stock is listed on The Nasdaq Global Market under the symbol “BLZE.”

Transfer Agent and Registrar

The transfer agent and registrar for our Class A common stock is Equiniti Trust Company, LLC.

Notice to Non-U.S. Investors

European Economic Area

In relation to each Member State of the European Economic Area (each, a “Relevant State”), no shares of Class A common stock have been offered or will be offered pursuant to this offering to the public in that Relevant State prior to the publication of a prospectus in relation to the shares of Class A common stock which has been approved by the competent authority in that Relevant State or, where appropriate, approved in another Relevant State and notified to the competent authority in that Relevant State, all in accordance with the Prospectus Regulation, except that shares of Class A common stock may be offered to the public in that Relevant State at any time:

provided that no such offer of shares of Class A common stock shall require us or the representatives to publish a prospectus pursuant to Article 3 of the Prospectus Regulation or supplement a prospectus pursuant to Article 23 of the Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the shares of Class A common stock in any Relevant State means the communication in any form and by any means of sufficient information on the terms of the offer and any shares of Class A common stock to be offered so as to enable an investor to decide to purchase or subscribe for any shares of Class A common stock, and the expression “Prospectus Regulation” means Regulation (EU) 2017/1129.

United Kingdom

In relation to the United Kingdom (the “UK”), no shares of Class A common stock have been offered or will be offered pursuant to this offering to the public in the UK prior to the publication of a prospectus in relation to the shares of Class A common stock which is to be treated as if it had been approved by the Financial Conduct Authority in accordance with the transitional provisions in Article 74 (transitional provisions) of the Prospectus (Amendment etc.) (EU Exit) Regulations 2019/1234, except that the shares of Class A common stock may be offered to the public in the United Kingdom at any time:

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provided that no such offer of shares of Class A common stock shall require us or the representatives to publish a prospectus pursuant to Section 85 of the FSMA or supplement a prospectus pursuant to Article 23 of the UK Prospectus Regulation.

For the purposes of this provision, the expression an “offer to the public” in relation to the shares of Class A common stock in the United Kingdom means the communication in any form and by any means of sufficient information on the terms of the offer and any shares of Class A common stock to be offered so as to enable an investor to decide to purchase or subscribe for any shares of Class A common stock, and the expression “UK Prospectus Regulation” means Regulation (EU) 2017/1129 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018.

Canada

The shares may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the shares must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (NI 33 105), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

Israel

In the State of Israel, this prospectus shall not be regarded as an offer to the public to purchase shares of Class A common stock under the Israeli Securities Law, 5728 – 1968, which requires a prospectus to be published and authorized by the Israel Securities Authority, if it complies with certain provisions of Section 15 of the Israeli Securities Law, 5728 – 1968, including, inter alia, if: (i) the offer is made, distributed or directed to not more than 35 investors, subject to certain conditions (the “Addressed Investors”); or (ii) the offer is made, distributed or directed to certain qualified investors defined in the First Addendum of the Israeli Securities Law, 5728 –1968, subject to certain conditions (the “Qualified Investors”). The Qualified Investors shall not be taken into account in the count of the Addressed Investors and may be offered to purchase securities in addition to the 35 Addressed Investors. We have not and will not take any action that would require it to publish a prospectus in accordance with and subject to the Israeli Securities Law, 5728 – 1968. We have not and will not distribute this prospectus or make, distribute or direct an offer to subscribe for our Class A common stock to any person within the State of Israel, other than to Qualified Investors and up to 35 Addressed Investors.

Qualified Investors may have to submit written evidence that they meet the definitions set out in of the First Addendum to the Israeli Securities Law, 5728 – 1968. In particular, we may request, as a condition to be offered Class A common stock, that Qualified Investors will each represent, warrant and certify to us and/or to anyone acting on our behalf: (i) that it is an investor falling within one of the categories listed in the First Addendum to the Israeli Securities Law, 5728 – 1968; (ii) which of the categories listed in the First Addendum to the Israeli Securities Law, 5728 – 1968 regarding Qualified Investors is applicable to it; (iii) that it will abide by all provisions set forth in the Israeli Securities Law, 5728 – 1968 and the regulations promulgated thereunder in

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connection with the offer to be issued Class A common stock; (iv) that the shares of Class A common stock that it will be issued are, subject to exemptions available under the Israeli Securities Law, 5728 – 1968: (a) for its own account; (b) for investment purposes only; and (c) not issued with a view to resale within the State of Israel, other than in accordance with the provisions of the Israeli Securities Law, 5728 – 1968; and (v) that it is willing to provide further evidence of its Qualified Investor status. Addressed Investors may have to submit written evidence in respect of their identity and may have to sign and submit a declaration containing, inter alia, the Addressed Investor’s name, address and passport number or Israeli identification number.

We have not authorized and do not authorize the making of any offer of securities through any financial intermediary on our behalf, other than offers made by the underwriters and their respective affiliates, with a view to the final placement of the securities as contemplated in this document. Accordingly, no purchaser of the shares, other than the underwriters, is authorized to make any further offer of shares on our behalf or on behalf of the underwriters.

Switzerland

This prospectus is not intended to constitute, and does not constitute, an offer to the public or solicitation to purchase or invest in the shares of Class A common stock. The shares of Class A common stock may not be publicly offered, sold or marketed, directly or indirectly, in or into Switzerland within the meaning of the Swiss Financial Services Act (“FinSA”), except under the following exemptions under the FinSA:

provided, in each case, that no such offer of shares of Class A common stock referred to in (i) through (ii) above shall require the publication of a prospectus for offers of shares of Class A common stock pursuant to the FinSA.

The shares of Class A common stock have not been and will not be admitted to trading on any trading venue in Switzerland.

Neither this prospectus nor any other marketing or offering material relating to the shares of Class A common stock constitutes a prospectus within the meaning of the FinSA. This prospectus has not been and will not be filed with, reviewed or approved by, a Swiss review body, and does not comply with the disclosure requirements applicable to a prospectus within the meaning of the FinSA. Neither this prospectus nor any other offering or marketing material relating to the shares of Class A common stock may be distributed or otherwise made available in Switzerland in a manner which would require the publication of a prospectus in Switzerland pursuant to the FinSA.

Hong Kong

This prospectus has not been and will not be approved by or registered with the Securities and Futures Commission of Hong Kong or the Registrar of Companies of Hong Kong. No person may offer or sell in Hong Kong, by means of any document, any shares of Class A common stock other than (i) to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong and any rules made thereunder, or (ii) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32) of Hong Kong (the “C(WUMP)O”) or which do not constitute an offer to the public within the meaning of the C(WUMP)O. No person may issue or have in its possession for the purposes of issue, in each case whether in Hong Kong or elsewhere, any advertisement, invitation or document relating to the shares of Class A common stock which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted to do so under the laws of Hong Kong) other than with respect to shares of Class A common stock which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong and any rules made thereunder.

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LEGAL MATTERS

The validity of the securities being offered hereby is being passed upon for us by Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, Redwood City, California. White & Case LLP, New York, New York, has acted as counsel for the underwriters in connection with this offering.

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EXPERTS

The consolidated financial statements of Backblaze, Inc. as of December 31, 2023 and 2022 and for each of the two years in the period ended December 31, 2023 incorporated by reference in this prospectus supplement have been so incorporated in reliance on the report of BDO USA, P.C., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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WHERE YOU CAN FIND MORE INFORMATION

We are subject to the reporting requirements of the Exchange Act, and file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the Internet at the SEC’s website at http://www.sec.gov. Our Class A common stock is listed on the Nasdaq Global Market.

We have filed a registration statement on Form S-3 with the SEC under the Securities Act. This prospectus supplement and the accompanying base prospectus omit certain information contained in the registration statement in accordance with SEC rules and regulations. You should review the information and exhibits in the registration statement for further information on us and our consolidated subsidiaries and the securities we are offering. Statements in this prospectus supplement and the accompanying prospectus concerning any document we filed as an exhibit to the registration statement or that we otherwise filed with the SEC are not intended to be comprehensive and are qualified by reference to these filings. You should review the complete document to evaluate these statements. You can obtain a copy of the registration statement from the SEC’s website.

We also maintain a website at http://www.backblaze.com, through which you can access our SEC filings. The information set forth on our website is not part of this prospectus supplement or the accompanying prospectus.

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INCORPORATION BY REFERENCE

The SEC allows us to “incorporate by reference” much of the information we file with the SEC, which means that we can disclose important information to you by referring you to those publicly available documents. The information that we incorporate by reference in this prospectus supplement is considered to be part of this prospectus supplement, and subsequent information that we file later with the SEC will automatically update and supersede this information. We filed a registration statement on Form S-3 under the Securities Act with the SEC with respect to the securities we may offer pursuant to this prospectus supplement. This prospectus supplement omits certain information contained in the registration statement, as permitted by the SEC. You should refer to the registration statement, including the exhibits, for further information about us and the securities we may offer pursuant to this prospectus supplement. Statements in this prospectus supplement regarding the provisions of certain documents filed with, or incorporated by reference in, the registration statement are not necessarily complete and each statement is qualified in all respects by that reference. This prospectus supplement incorporates by reference the documents listed below and any future filings that we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (in each case, other than those documents or the portions of those documents furnished (but not filed) pursuant to Items 2.02 or 7.01 of any Current Report on Form 8-K), until the offering of the securities being registered under this prospectus supplement is terminated or completed:

We will provide without charge to each person, including any beneficial owner, to whom a copy of this prospectus supplement is delivered, upon written or oral request of any such person, a copy of any or all of the documents that have been or may be incorporated by reference into this prospectus supplement and accompanying base prospectus at no cost. Any such request may be made in writing or by telephoning us at the following address or telephone number:

Backblaze, Inc.

201 Baldwin Ave.

San Mateo, CA 94401

(650) 352-3738

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The information in this prospectus is not complete and may be changed. We may not sell the securities pursuant to this prospectus until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED MAY 1, 2024

PROSPECTUS

$200,000,000

Class A Common Stock

Preferred Stock

Debt Securities

Warrants

We may, from time to time in one or more offerings, offer and sell Class A common stock, preferred stock, debt securities or warrants. We refer to our common stock, preferred stock, debt securities and warrants collectively as the “securities.” The securities we may offer may be convertible into or exercisable or exchangeable for other securities. We may offer the securities separately or together, in separate classes, series and in amounts, at prices and on terms that will be determined at the time the securities are offered. The aggregate initial offering price of all securities sold by us under this prospectus will not exceed $200,000,000.

This prospectus describes some of the general terms that may apply to these securities. Each time securities are sold, the specific terms and amounts of the securities to be offered and any other information relating to the specific offering will be set forth in a supplement to this prospectus. You should read this prospectus, any prospectus supplement and any related free writing prospectus carefully before you invest in any of the securities. This prospectus may not be used to offer and sell securities unless accompanied by a prospectus supplement.

We may offer and sell these securities to or through one or more underwriters, dealers and agents, directly to purchasers, through a combination of these methods or through other means, on a continuous or delayed basis. If any underwriters are involved in the sale of any securities offered by this prospectus and any prospectus supplement, their names, and any applicable purchase price, fee, commission or discount arrangement between or among them, will be set forth, or may be calculable from the information set forth, in the accompanying prospectus supplement.

Our Class A common stock, $0.0001 par value per share, is listed on The Nasdaq Global Market under the symbol “BLZE.” On April 29, 2024, the last reported sale price of our Class A common stock on The Nasdaq Global Market was $9.24 per share.

Investing in our securities involves significant risks. See the section of this prospectus captioned “Risk Factors” beginning on page 3, in any applicable prospectus supplement and in our Securities and Exchange Commission (“SEC”) filings that are incorporated by reference herein.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 1, 2024.

TABLE OF CONTENTS

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the “SEC”) using a “shelf” registration process. Under this shelf registration process, we may offer and sell any combination of the securities described in this prospectus from time to time in one or more offerings up to a total aggregate offering price of $200 million.

This prospectus provides you with a general description of the securities that we may offer. Each time we sell securities pursuant to this prospectus, we will provide a prospectus supplement that contains specific information about the terms of that offering, including the specific amounts, prices and terms of the securities offered. The prospectus supplement may also include a discussion of any risk factors or other special considerations that apply to those securities. In addition, the prospectus supplement may also add, update or change the information contained in this prospectus. Accordingly, to the extent this prospectus is inconsistent with the prospectus supplement, information in this prospectus is superseded by the information in the prospectus supplement.

We have not authorized anyone to provide you with information or make any representations in connection with this offering other than those contained or incorporated by reference in this prospectus, any accompanying prospectus supplement and any related free writing prospectus in connection with the offering described herein and therein, and, if given or made, such information or representations must not be relied upon as having been authorized by us. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. Neither this prospectus, nor any prospectus supplement nor any related free writing prospectus shall constitute an offer to sell or the solicitation of an offer to buy any securities other than the securities described in this prospectus or an offer to sell or the solicitation of an offer to buy any such securities in any circumstances in which such offer or solicitation is unlawful. This document may only be used where it is legal to sell these securities. This prospectus does not contain all of the information included in the registration statement. For a more complete understanding of the offering of the securities, you should refer to the registration statement, including its exhibits.

We urge you to read carefully this prospectus, any accompanying prospectus supplement and any related free writing prospectus, as well as the documents incorporated by reference herein and therein, before deciding whether to purchase any of the securities being offered. Neither the delivery of this prospectus or any prospectus supplement or any related free writing prospectus nor any sale made hereunder shall under any circumstances imply that the information contained or incorporated by reference herein or in any prospectus supplement or related free writing prospectus is correct as of any date subsequent to the date hereof or of such prospectus supplement or related free writing prospectus, as applicable. You should not assume that the information contained in this prospectus, any prospectus supplement, any related free writing prospectus, and any document incorporated by reference herein is accurate as of any dates other than their respective dates, regardless of the time of delivery of this prospectus or any sale of securities. We provided the information contained in the aforementioned documents only as of the date of the applicable document, and it is possible that the information, including our business, financial condition, and results of operations, may have changed since that date.

Backblaze, the Backblaze logo, and our other registered or common law trademarks appearing in this prospectus are the property of Backblaze, Inc. This prospectus contains references to our trademarks and service marks as well as to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this prospectus, including logos, artwork, and other visual displays, may appear without the ^® or TM symbols, but such references are not intended to indicate in any way that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other entities’ trade names, trademarks, or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other entity.

Unless the context otherwise requires or otherwise indicated, we use the terms “Backblaze,” the “Company,” “we,” “us,” “our” and similar terms to refer to Backblaze, Inc. and its consolidated subsidiaries.

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THE COMPANY

Overview

We are a leading specialized storage cloud platform, providing businesses and consumers cloud services to store, use, and protect their data in an easy and affordable manner. We provide these cloud services through a purpose-built, web-scale software infrastructure built on commodity hardware. We believe that by substantially reducing the complexity and frustration of storing, using, and protecting data, we can empower customers to focus on their core business operations. Through our blog and culture of transparency, we have built a community of millions of readers and brand advocates. Referrals from our community of brand advocates, combined with our highly efficient and primarily self-serve customer acquisition model and an ecosystem of thousands of partners, have allowed us to attract more than 500,000 customers as of December 31, 2023. These customers use our Storage Cloud platform across more than 175 countries to grow and protect their business data on our over 3 exabytes, or 3 trillion megabytes, of data storage under management.

At its founding, Backblaze set out to simplify the process of storing, using, and protecting data. Over the following years we focused relentlessly on cutting away the complexity common among diversified cloud vendors’ services and legacy on-premises system vendors. Today, we believe our solutions are differentiated by their ease of use and affordability. We believe that focusing on storage use cases and promoting an open ecosystem helps position us to integrate well with a broad range of partners. From our straightforward pricing model, to our transparent communication with customers, to the popular and insightful content on our blog—we believe we have established ourselves as an open and trusted provider and partner.

Corporate Information

We were incorporated in Delaware in April 2007. Our principal executive offices are located at 201 Baldwin Ave., San Mateo, CA 94401. Our telephone number is (650) 352-3738. Our website address is https://www.backblaze.com. We have included our website address in this prospectus solely as an inactive textual reference. The inclusion of our website address in this prospectus does not include or incorporate by reference the information on, or accessible through, our website into this prospectus.

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RISK FACTORS

An investment in our securities involves a high degree of risk. The prospectus supplement applicable to each offering of our securities will contain a discussion of the risks applicable to an investment in the securities offered thereunder. Before deciding whether to invest in our securities, you should consider carefully the risks and uncertainties discussed under the section titled “Risk Factors” in the applicable prospectus supplement, together with all the other information contained or incorporated by reference in this prospectus and the applicable prospectus supplement. You should also consider the risks, uncertainties and assumptions discussed in the section titled “Risk Factors” in our most recent Annual Report on Form 10-K, as updated by our subsequent Quarterly Reports on Form 10-Q and other filings we make with the SEC, which are incorporated by reference into this prospectus in their entirety and which may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the future and by information in a prospectus supplement for a particular offering. The risks described in these documents are not the only ones we face. There may be other risks and uncertainties not presently known to us or that we deem immaterial, which could have material adverse effects on our business, results of operations, financial condition or prospects and could result in a partial or complete loss of your investment.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus, any prospectus supplement, and the information incorporated by reference in this prospectus and any prospectus supplement contain or may contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than statements of historical fact are forward-looking statements. Forward-looking statements are often identified by the use of words such as, but not limited to, “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “target,” “plan,” “expect,” or the negative of these terms or other similar expressions that concern our expectations, strategy, plans or intentions.

Forward-looking statements involve substantial risk and uncertainties and are not guarantees of future performance and involve risks and uncertainties. The forward-looking statements contained in this prospectus, any prospectus supplement, and the information incorporated by reference in this prospectus or any prospectus supplement are based on information then available to us and expectations and assumptions that we deem reasonable at the time the statements are made. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Accordingly, you should not place undue reliance on these forward-looking statements. We do not undertake any obligation to update any forward-looking statements in this prospectus, any prospectus supplement, and the information incorporated by reference in this prospectus or any prospectus supplement or in any of our other communications, except as required by law. All such forward-looking statements should be read as of the time the statements were made and with the recognition that these forward-looking statements may not be complete or accurate at a later date.

Factors that could cause or contribute to such differences include, but are not limited to, those identified below, and those discussed in the section titled “Risk Factors” of our most recent Annual Report on Form 10-K and any subsequent Quarterly Report on Form 10-Q incorporated by reference in this prospectus and in the section of any related prospectus supplement entitled “Risk Factors.”

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USE OF PROCEEDS

Unless otherwise indicated in the applicable prospectus supplement, we intend to use the net proceeds from the sale of the securities under this prospectus for general corporate purposes. General corporate purposes may include acquisitions, repayment of debt, investments in our business, additions to working capital, capital expenditures, repurchases of Class A common stock and advances to or investments in our subsidiaries. Pending the use of net proceeds, we intend to invest these funds in investment-grade, interest-bearing securities, or hold as cash.

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DESCRIPTION OF CAPITAL STOCK

The following descriptions of our capital stock is a summary of the rights of our capital stock and summarizes certain provisions of our Amended and Restated Certificate of Incorporation, as amended to date (our “certificate of incorporation”) and Amended and Restated Bylaws (our “bylaws”). This summary does not purport to be complete and is qualified in entirety by reference to our certificate of incorporation and our bylaws, copies of which have been filed as exhibits to this as exhibits to the registration statement of which this prospectus is a part, as well as to applicable provisions of the Delaware General Corporation Law (the “DGCL”).

Our authorized capital stock consists of 113,295,986 shares, all with a par value of $0.0001 per share, of which:

Common Stock

We have one outstanding class of authorized common stock: Class A common stock.

We previously had two classes of authorized common stock: Class A common stock and Class B common stock. In July 2023, pursuant to the terms of our certificate of incorporation, all outstanding shares of Class B common stock automatically converted into shares of Class A common stock on the date specified by a vote of the holders of a majority of the then outstanding shares of Class B common stock. In connection with the conversion, the previously outstanding shares of Class B common stock were retired in accordance with our certificate of incorporation. Since July 2023, no shares of our Class B common stock have been outstanding, and our certificate of incorporation prohibits the issuance of additional shares of our Class B common stock.

Dividend Rights

Subject to preferences that may apply to shares of preferred stock outstanding at the time, the holders of outstanding shares of our Class A common stock are entitled to receive dividends out of funds legally available if our board of directors, in its discretion, determines to issue dividends and only then at the times and in the amounts that our board of directors may determine.

Voting Rights

The holders of our Class A common stock are entitled to one vote per share.

The holders of Class A common stock will not have cumulative voting rights in the election of directors. Accordingly, holders of a majority of the voting power of the shares of common stock entitled to vote in any election of directors may elect all of the directors standing for election. Except for the election of directors, if a quorum is present, an action on a matter is approved if it receives the affirmative vote of the holders of a majority of the voting power of the shares of capital stock present in person or represented by proxy at the meeting and entitled to vote on the matter, unless otherwise required by applicable law, the DGCL, our certificate of incorporation or our bylaws. The election of directors will be determined by a plurality of the votes cast in respect of the shares present in person or represented by proxy at the meeting and entitled to vote, meaning that the nominees with the greatest number of votes cast, even if less than a majority, will be elected. The rights, preferences and privileges of holders of Class A common stock are subject to, and may be impacted by, the rights of the holders of shares of any series of preferred stock that we may designate and issue in the future.

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No Preemptive or Similar Rights

Our Class A common stock is not entitled to preemptive rights and is not subject to conversion, redemption or sinking fund provisions.

Right to Receive Liquidation Distributions

Upon our dissolution, liquidation or winding-up, the assets legally available for distribution to our stockholders are distributable ratably among the holders of our Class A common stock, subject to prior satisfaction of all outstanding debt and liabilities and the preferential rights and payment of liquidation preferences, if any, on any outstanding shares of preferred stock.

Preferred Stock

No shares of preferred stock are outstanding, but we are authorized, subject to limitations prescribed by Delaware law, to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series and to fix the designation, powers, preferences, and rights of the shares of each series and any associated qualifications, limitations, or restrictions. Our board of directors also can increase or decrease the number of shares of any series, but not below the number of shares of that series then outstanding, without any further vote or action by our stockholders. Our board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of the common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in control of our company and may adversely affect the market price of our common stock and the voting and other rights of the holders of common stock. We have no current plan to issue any shares of preferred stock.

Anti-Takeover Provisions

Delaware Law

We are governed by the provisions of Section 203 of the DGCL regulating corporate takeovers. This section prevents some Delaware corporations from engaging, under some circumstances, in a business combination, which includes a merger or sale of at least 10% of the corporation’s assets with any interested stockholder, meaning a stockholder who, together with affiliates and associates, owns or, within three years prior to the determination of interested stockholder status, did own 15% or more of the corporation’s outstanding voting stock, unless:

A Delaware corporation may “opt out” of these provisions with an express provision in its original certificate of incorporation or an express provision in its certificate of incorporation or amended and restated bylaws resulting from a stockholders’ amendment approved by at least a majority of the outstanding voting

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shares. We have not opted out of these provisions. As a result, mergers or other takeover or change in control attempts of us may be discouraged or prevented.

Certificate of Incorporation and Bylaw Provisions

Our certificate of incorporation and our bylaws include a number of provisions that may have the effect of deterring hostile takeovers or delaying or preventing changes in control of our management team, including the following:

Choice of Forum

Our certificate of incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum for any derivative action or proceeding brought on our behalf; any action asserting a breach of fiduciary duty owed by any of our directors, officers or other employee to us or our stockholder, creditors or other constituents; any action asserting a claim against us arising pursuant to the DGCL, our certificate of incorporation or our bylaws; any action to interpret, apply, enforce, or determine the validity of our certificate of incorporation or our bylaws ; any action asserting a claim against us that is governed by the internal affairs doctrine; or any action asserting an “internal corporate claim” as defined in Section 115 of the DGCL. Our

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certificate of incorporation also provides that the U.S. federal district courts will be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act of 1933, as amended (the “Securities Act”). Some companies that adopted a similar federal district court forum selection provision were subject to a suit in the Chancery Court of Delaware by stockholders who asserted that the provision is not enforceable. While the Delaware Supreme Court held that such federal district court forum selection provision was in fact valid, there can be no assurance that federal courts or other state courts will follow the holding of the Delaware Supreme Court or determine that the federal district court forum selection provision should be enforced in a particular case. These choice of forum provisions do not apply to actions brought to enforce a duty or liability created by the Securities Exchange Act of 1934, as amended. We intend for the choice of forum provision regarding claims arising under the Securities Act to apply despite the fact that Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all actions brought to enforce any duty or liability created by the Securities Act or the rules and regulations thereunder. There is uncertainty as to whether a court would enforce such provision with respect to claims under the Securities Act. Our exclusive forum provision does not relieve us of our duties to comply with the federal securities laws and the rules and regulations thereunder, and our stockholders will not be deemed to have waived our compliance with these laws, rules and regulations.

These exclusive forum provisions may limit the ability of our stockholders to bring a claim in a judicial forum that such stockholders find favorable for disputes with us or our directors, officers or employees, which may discourage such lawsuits against us and our directors, officers and employees. Alternatively, if a court were to find such provisions contained in our certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, we may incur additional costs associated with resolving such action in other jurisdictions, which could materially adversely affect our business, financial condition and operating results.

Transfer Agent and Registrar

The transfer agent and registrar for our Class A common stock is Equiniti Trust Company, LLC. The transfer agent’s address is 48 Wall St., Floor 23, New York, NY 10005, and its telephone number is (800) 937-5449.

Listing

Our Class A common stock is listed on the Nasdaq Global Market under the symbol “BLZE.”

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DESCRIPTION OF DEBT SECURITIES

We have summarized below general terms and conditions of the debt securities that we may offer and sell pursuant to this prospectus. When we offer to sell a particular series of debt securities, we will describe the specific terms and conditions of the series in a prospectus supplement to this prospectus. We will also indicate in the applicable prospectus supplement whether the general terms and conditions described in this prospectus apply to the series of debt securities. The terms and conditions of the debt securities of a series may be different in one or more respects from the terms and conditions described below. If so, those differences will be described in the applicable prospectus supplement.

We may issue the debt securities in one or more series under an indenture between us and a trustee to be selected by us. The following description of provisions of the indenture does not purport to be complete and is subject to, and qualified in its entirety by reference to, the form of indenture, which has been filed with the SEC as an exhibit to the registration statement of which this prospectus forms a part. A form of each debt security, any future supplemental indenture or similar document also will be so filed. You should read the indenture and any supplemental indenture or similar document because they, and not this description, define your rights as holder of our debt securities. All capitalized terms have the meanings specified in the indenture.

For purposes of this section of this prospectus, references to “we,” “us” and “our” are to Backblaze, Inc. and not to any of its subsidiaries.

General

We may issue, from time to time, debt securities, in one or more series, that will consist of either senior debt (“Senior Debt Securities”), senior subordinated debt (“Senior Subordinated Debt Securities”), subordinated debt (“Subordinated Debt Securities”) or junior subordinated debt (“Junior Subordinated Debt Securities” and, together with the Senior Subordinated Debt Securities and the Subordinated Debt Securities, the “Subordinated Securities”). Debt securities, whether senior, senior subordinated, subordinated or junior subordinated, may be issued as convertible debt securities or exchangeable debt securities.

The indenture does not limit the amount of debt securities that we may issue. We may, without the consent of the holders of the debt securities of any series, issue additional debt securities ranking equally with, and otherwise similar in all respects to, the debt securities of the series (except for any differences in the issue price and, if applicable, the initial interest accrual date and interest payment date) so that those additional debt securities will be consolidated and form a single series with the debt securities of the series previously offered and sold; provided that if the additional debt securities are not fungible with the debt securities of the series previously offered or sold for U.S. federal income tax purposes, the additional debt securities will have a separate CUSIP or other identifying number.

The indenture provides that we may issue debt securities up to the principal amount that we may authorize and may be in any currency or currency unit designated by us. Except for the limitations on consolidation, merger and sale of all or substantially all of our assets contained in the indenture, the terms of the indenture do not contain any covenants or other provisions designed to afford holders of any debt securities protection with respect to our operations, financial condition or transactions involving us.

We may issue the debt securities issued under the indenture as “discount securities,” which means they may be sold at a discount below their stated principal amount. These debt securities, as well as other debt securities that are not issued at a discount, may, for U.S. federal income tax purposes, be treated as if they were issued with “original issue discount,” because of interest payment and other characteristics. Special U.S. federal income tax considerations applicable to debt securities issued with original issue discount will be described in more detail in any applicable prospectus supplement.

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Provisions of the Indenture

The applicable prospectus supplement for a series of debt securities that we issue will describe, among other things, the following terms of the offered debt securities:

The applicable prospectus supplement will set forth certain U.S. federal income tax considerations for holders of any debt securities and the securities exchange or quotation system on which any debt securities are listed or quoted, if any.

Debt securities issued by us will be structurally subordinated to all indebtedness and other liabilities of our subsidiaries, except to the extent any such subsidiary guarantees or is otherwise obligated to make payment on such debt securities.

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Senior Debt Securities

Payment of the principal of, and premium, if any, and interest on, Senior Debt Securities will rank on a parity with all of our other unsecured and unsubordinated debt.

Senior Subordinated Debt Securities

Payment of the principal of, and premium, if any, and interest on, Senior Subordinated Debt Securities will be junior in right of payment to the prior payment in full of all of our unsubordinated debt. We will set forth in the applicable prospectus supplement relating to any Senior Subordinated Debt Securities the subordination terms of such securities as well as the aggregate amount of outstanding debt, as of the most recent practicable date, that by its terms would be senior to the Senior Subordinated Debt Securities. We will also set forth in such prospectus supplement limitations, if any, on issuance of additional debt ranking senior to the Senior Subordinated Debt Securities.

Subordinated Debt Securities

Payment of the principal of, and premium, if any, and interest on, Subordinated Debt Securities will be subordinated and junior in right of payment to the prior payment in full of all of our unsubordinated and senior subordinated debt. We will set forth in the applicable prospectus supplement relating to any Subordinated Debt Securities the subordination terms of such securities as well as the aggregate amount of outstanding indebtedness, as of the most recent practicable date, that by its terms would be senior to the Subordinated Debt Securities. We will also set forth in such prospectus supplement limitations, if any, on issuance of additional debt ranking senior to the Subordinated Debt Securities.

Junior Subordinated Debt Securities

Payment of the principal of, and premium, if any, and interest on, Junior Subordinated Debt Securities will be subordinated and junior in right of payment to the prior payment in full of all of our unsubordinated, senior subordinated and subordinated debt. We will set forth in the applicable prospectus supplement relating to any Junior Subordinated Debt Securities the subordination terms of such securities as well as the aggregate amount of outstanding debt, as of the most recent practicable date, that by its terms would be senior to the Junior Subordinated Debt Securities. We will also set forth in such prospectus supplement limitations, if any, on issuance of additional debt ranking senior to the Junior Subordinated Debt Securities.

Conversion or Exchange Rights

Debt securities may be convertible into or exchangeable for other securities or property of us. The terms and conditions of conversion or exchange will be set forth in the applicable prospectus supplement. The terms will include, among others, the following:

Consolidation, Merger or Sale

The indenture provides that we cannot consolidate or merge with or into, or transfer or lease our properties and assets substantially as an entirety to, any person, and we shall not permit any other person to consolidate with or merge into us, unless:

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Subject to certain exceptions, when the person to whom our assets are transferred or leased has assumed our obligations under the debt securities and the indenture, we shall be discharged from all our obligations under the debt securities and the indenture.

This covenant would not apply to any recapitalization transaction, a change of control of us or a highly leveraged transaction, unless the transaction or change of control were structured to include a merger or consolidation or transfer or lease of our properties and assets substantially as an entirety.

Events of Default

Unless otherwise indicated, the term “Event of Default,” when used in the indenture with respect to the debt securities of any series, means any of the following:

An Event of Default for a particular series of debt securities does not necessarily constitute an Event of Default for any other series of debt securities issued under the indenture.

If an Event of Default (other than an Event of Default relating to events of bankruptcy, insolvency or reorganization of us) involving any series of debt securities has occurred and is continuing, the trustee or the holders of not less than 25% in aggregate principal amount of the debt securities of each affected series may declare the entire principal amount of all the debt securities of such affected series, and the interest accrued thereon, if any, to be due and payable immediately. The holders of not less than a majority in aggregate principal amount of the debt securities of an affected series may, after satisfying conditions, rescind and annul any of the above-described declarations and consequences involving such series.

If an Event of Default relating to events of bankruptcy, insolvency or reorganization of us occurs and is continuing, then the entire principal amount of all of the debt securities outstanding, and the interest accrued thereon, if any, will automatically become due and payable immediately, without any declaration or other act by the trustee or any holder.

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The indenture imposes limitations on suits brought by holders of debt securities against us with respect to an Event of Default. Except as provided below, no holder of debt securities of any series may institute any action against us under the indenture unless:

Notwithstanding the foregoing, each holder of debt securities of any series has the right, which is absolute and unconditional, to receive payment of the principal of, and premium and interest, if any, on, such debt securities when due and to institute suit for the enforcement of any such payment, and such rights may not be impaired without the consent of that holder of debt securities.

We will be required to file annually with the trustee a certificate, signed by one of our officers, stating whether or not the officer knows of any default by us in the performance, observance or fulfillment of any condition or covenant of the indenture.

Registered Global Securities

We may issue the debt securities of a series in whole or in part in the form of one or more fully registered global securities that we will deposit with a depositary or with a nominee for a depositary identified in the applicable prospectus supplement and registered in the name of such depositary or nominee. In such case, we will issue one or more registered global securities denominated in an amount equal to the aggregate principal amount of all of the debt securities of the series to be issued and represented by such registered global security or securities.

Unless and until it is exchanged in whole or in part for debt securities in definitive registered form, a registered global security may not be transferred except as a whole:

The prospectus supplement relating to a series of debt securities will describe the specific terms of the depositary arrangement with respect to any portion of such series represented by a registered global security. We anticipate that the following provisions will apply to all depositary arrangements for debt securities:

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The laws of some states may require that certain purchasers of securities take physical delivery of the securities in definitive form. These laws may limit the ability of those persons to own, transfer or pledge beneficial interests in registered global securities.

So long as the depositary for a registered global security, or its nominee, is the registered owner of the registered global security, the depositary or the nominee, as the case may be, will be considered the sole owner or holder of the debt securities represented by the registered global security for all purposes under the indenture. Except as set forth below, owners of beneficial interests in a registered global security:

Accordingly, each person owning a beneficial interest in a registered global security must rely on the procedures of the depositary for the registered global security and, if the person is not a participant, on the procedures of a participant through which the person owns its interest, to exercise any rights of a holder under the indenture.

We understand that under existing industry practices, if we request any action of holders or if an owner of a beneficial interest in a registered global security desires to give or take any action that a holder is entitled to give or take under the indenture, the depositary for the registered global security would authorize the participants holding the relevant beneficial interests to give or take the action, and those participants would authorize beneficial owners owning through those participants to give or take the action or would otherwise act upon the instructions of beneficial owners holding through them.

We will make payments of principal and premium, if any, and interest, if any, on debt securities represented by a registered global security registered in the name of a depositary or its nominee to the depositary or its nominee, as the case may be, as the registered owners of the registered global security. None of us, the trustee or any other agent of us or the trustee will be responsible or liable for any aspect of the records relating to, or payments made on account of, beneficial ownership interests in the registered global security or for maintaining, supervising or reviewing any records relating to the beneficial ownership interests.

We expect that the depositary for any debt securities represented by a registered global security, upon receipt of any payments of principal and premium, if any, and interest, if any, in respect of the registered global security, will immediately credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the registered global security as shown on the records of the depositary. We also expect that standing customer instructions and customary practices will govern payments by participants to owners of beneficial interests in the registered global security held through the participants, as is now the case with the securities held for the accounts of customers in bearer form or registered in “street name.” We also expect that any of these payments will be the responsibility of the participants.

If the depositary for any debt securities represented by a registered global security is at any time unwilling or unable to continue as depositary or ceases to be a clearing agency registered under the Exchange Act, we will

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appoint an eligible successor depositary. If we fail to appoint an eligible successor depositary within 90 days, we will issue the debt securities in definitive form in exchange for the registered global security. In addition, we may at any time and in our sole discretion decide not to have any of the debt securities of a series represented by one or more registered global securities. In such event, we will issue debt securities of that series in a definitive form in exchange for all of the registered global securities representing the debt securities. The trustee will register any debt securities issued in definitive form in exchange for a registered global security in such name or names as the depositary, based upon instructions from its participants, shall instruct the trustee.

Discharge, Defeasance and Covenant Defeasance

We can discharge or defease our obligations under the indenture as set forth below. Unless otherwise set forth in the applicable prospectus supplement, the subordination provisions applicable to any Subordinated Securities will be expressly made subject to the discharge and defeasance provisions of the indenture.

We may discharge our obligations to holders of any series of debt securities that have not already been delivered to the trustee for cancellation and that have either become due and payable or are by their terms to become due and payable within one year (or to be called for redemption within one year). We may effect a discharge by irrevocably depositing with the trustee cash or U.S. government obligations, as trust funds, in an amount certified to be sufficient to pay when due, whether at maturity, upon redemption or otherwise, the principal of, and premium, if any, and interest on, the debt securities and any mandatory sinking fund payments.

Unless otherwise provided in the applicable prospectus supplement, we may also discharge any and all of our obligations to holders of any series of debt securities at any time (“legal defeasance”). We also may be released from the obligations imposed by any covenants of any outstanding series of debt securities and provisions of the indenture, and we may omit to comply with those covenants without creating an Event of Default (“covenant defeasance”). We may effect legal defeasance and covenant defeasance only if, among other things:

Although we may discharge or defease our obligations under the indenture as described in the two preceding paragraphs, we may not avoid, among other things, our duty to register the transfer or exchange of any series of debt securities, to replace any temporary, mutilated, destroyed, lost or stolen series of debt securities or to maintain an office or agency in respect of any series of debt securities.

We may exercise our legal defeasance option notwithstanding our prior exercise of our covenant defeasance option.

Modifications of the Indenture

The indenture provides that we and the trustee may enter into supplemental indentures without the consent of the holders of debt securities to:

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The indenture also provides that we and the trustee may, with the consent of the holders of not less than a majority in aggregate principal amount of the outstanding debt securities of all series of Senior Debt Securities or Subordinated Securities, as the case may be, then outstanding and affected thereby (voting as one class), add any provisions to, or change in any manner, eliminate or modify in any way the provisions of, the indenture or modify in any manner the rights of the holders of the debt securities. We and the trustee may not, however, without the consent of the holder of each outstanding debt security affected thereby:

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Concerning the Trustee

The indenture provides that there may be more than one trustee under the indenture, each with respect to one or more series of debt securities. If there are different trustees for different series of debt securities, each trustee will be a trustee of a trust under the indenture separate and apart from the trust administered by any other trustee under the indenture. Except as otherwise indicated in this prospectus or any accompanying prospectus supplement, any action permitted to be taken by a trustee may be taken by such trustee only with respect to the one or more series of debt securities for which it is the trustee under the indenture. Any trustee under the indenture may resign or be removed with respect to one or more series of debt securities. All payments of principal of, and premium, if any, and interest on, and all registration, transfer, exchange, authentication and delivery (including authentication and delivery on original issuance of the debt securities) of, the debt securities of a series will be effected by the trustee with respect to such series at an office designated by the trustee.

The indenture contains limitations on the right of the trustee, should it become a creditor of us, to obtain payment of claims in some cases or to realize on certain property received in respect of any such claim as security or otherwise. The trustee may engage in other transactions. If it acquires any conflicting interest relating to any duties with respect to the debt securities, however, it must eliminate the conflict or resign as trustee.

The holders of a majority in aggregate principal amount of any series of debt securities then outstanding will have the right to direct the time, method and place of conducting any proceeding for exercising any remedy available to the trustee with respect to such series of debt securities, provided that the direction would not conflict with any rule of law or with the indenture, would not be unduly prejudicial to the rights of another holder of the debt securities, and would not involve any trustee in personal liability. The indenture provides that in case an Event of Default shall occur and be known to any trustee and not be cured, the trustee must use the same degree of care as a prudent person would use in the conduct of his or her own affairs in the exercise of the trustee’s power. Subject to these provisions, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request of any of the holders of the debt securities, unless they shall have offered to the trustee security and indemnity satisfactory to the trustee.

No Individual Liability of Incorporators, Stockholders, Officers or Directors

The indenture provides that no incorporator and no past, present or future stockholder, officer or director of us or any successor corporation in their capacity as such shall have any individual liability for any of our obligations, covenants or agreements under the debt securities or the indenture.

Governing Law

The indenture and the debt securities will be governed by, and construed in accordance with, the laws of the State of New York.

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DESCRIPTION OF WARRANTS

General

We may issue debt warrants for the purchase of debt securities or stock warrants for the purchase of preferred stock or Class A common stock.

The warrants will be issued under warrant agreements to be entered into between us and the purchasers or between us and a bank or trust company, as warrant agent, all to be set forth in the applicable prospectus supplement relating to any or all warrants in respect of which this prospectus is being delivered. We will file a copy of the warrant and warrant agreement with the SEC each time we issue a series of warrants, and these warrants and warrant agreements will be incorporated by reference into the registration statement of which this prospectus forms a part.

The following description sets forth certain general terms and provisions of the warrants to which any prospectus supplement may relate. The particular terms of the warrants to which any prospectus supplement may relate and the extent, if any, to which such general provisions may apply to the warrants so offered will be described in the applicable prospectus supplement. The following summary of certain provisions of the warrants, warrant agreements and warrant certificates does not purport to be complete and is subject to, and is qualified in its entirety by express reference to, all the provisions of the warrant agreements and warrant certificates, including the definitions therein of certain terms.

Debt Warrants

General. Reference is made to the applicable prospectus supplement for the terms of debt warrants in respect of which this prospectus is being delivered, the debt securities warrant agreement relating to such debt warrants and the debt warrant certificates representing such debt warrants, including the following:

The debt warrant certificates will be exchangeable for new debt warrant certificates of different denominations and debt warrants may be exercised at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement. Prior to the exercise of their debt warrants, holders of debt warrants will not have any of the rights of holders of the debt securities purchasable upon such exercise and will not be entitled to any payments of principal and premium, if any, and interest, if any, on the debt securities purchasable upon such exercise.

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Exercise of Debt Warrants. Each debt warrant will entitle the holder to purchase for cash such principal amount of debt securities at such exercise price as shall in each case be set forth in, or be determinable as set forth in, the applicable prospectus supplement relating to the debt warrants offered thereby. Unless otherwise specified in the applicable prospectus supplement, debt warrants may be exercised at any time up to 5:00 p.m., New York City time, on the expiration date set forth in the applicable prospectus supplement. After 5:00 p.m., New York City time, on the expiration date, unexercised debt warrants will become void.

Debt warrants may be exercised as set forth in the applicable prospectus supplement relating to the debt warrants. Upon receipt of payment and the debt warrant certificate properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement, we will, as soon as practicable, forward the debt securities purchasable upon such exercise. If less than all of the debt warrants represented by such debt warrant certificate are exercised, a new debt warrant certificate will be issued for the remaining amount of debt warrants.

Stock Warrants

General. Reference is made to the applicable prospectus supplement for the terms of stock warrants in respect of which this prospectus is being delivered, the stock warrant agreement relating to such stock warrants and the stock warrant certificates representing such stock warrants, including the following:

The stock warrant certificates will be exchangeable for new stock warrant certificates of different denominations and stock warrants may be exercised at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement. Prior to the exercise of their stock warrants, holders of stock warrants will not have any of the rights of holders of shares of capital stock purchasable upon such exercise, and will not be entitled to any dividend payments on such capital stock purchasable upon such exercise.

Exercise of Stock Warrants. Each stock warrant will entitle the holder to purchase for cash such number of shares of preferred stock or common stock, as the case may be, at such exercise price as shall in each case be set forth in, or be determinable as set forth in, the applicable prospectus supplement relating to the stock warrants offered thereby. Unless otherwise specified in the applicable prospectus supplement, stock warrants may be exercised at any time up to 5:00 p.m., PST time, on the expiration date set forth in the applicable prospectus supplement. After 5:00 p.m., California time, on the expiration date, unexercised stock warrants will become void.

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Stock warrants may be exercised as set forth in the applicable prospectus supplement relating thereto. Upon receipt of payment and the stock warrant certificates properly completed and duly executed at the corporate trust office of the warrant agent or any other office indicated in the applicable prospectus supplement, we will, as soon as practicable, forward a certificate representing the number of shares of capital stock purchasable upon such exercise. If less than all of the stock warrants represented by such stock warrant certificate are exercised, a new stock warrant certificate will be issued for the remaining amount of stock warrants.

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PLAN OF DISTRIBUTION

We may offer and sell the securities being offered hereby in one or more of the following ways from time to time:

We will identify the specific plan of distribution, including any underwriters, dealers, agents or other purchasers, persons or entities and any applicable compensation, in a prospectus supplement, in an amendment to the registration statement of which this prospectus is a part, or in other filings we make with the SEC under the Exchange Act, which are incorporated by reference.

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LEGAL MATTERS

The validity of the securities being offered hereby is being passed upon for us by Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP, Redwood City, California. As appropriate, any underwriters will also be advised about the validity of the securities and other legal matters by their own counsel, which will be named in the applicable prospectus supplement.

EXPERTS

The consolidated financial statements of Backblaze Inc. (the Company) as of December 31, 2023 and 2022 and for each of the two years in the period ended December 31, 2023 incorporated by reference in this Prospectus and in the Registration Statement have been so incorporated in reliance on the report of BDO USA, P.C., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the Internet at the SEC’s website at http://www.sec.gov. Copies of certain information filed by us with the SEC are also available on our website at www.backblaze.com. Information accessible on or through our website is not incorporated herein or a part of this prospectus.

This prospectus is part of a registration statement we filed with the SEC. This prospectus omits some information contained in the registration statement in accordance with SEC rules and regulations. You should review the information and exhibits in the registration statement for further information on us and the securities we are offering. Statements in this prospectus concerning any document we filed as an exhibit to the registration statement or that we otherwise filed with the SEC are not intended to be comprehensive and are qualified by reference to these filings. You should review the complete document to evaluate these statements.

INCORPORATION BY REFERENCE

The SEC allows us to incorporate by reference much of the information we file with the SEC, which means that we can disclose important information to you by referring you to those publicly available documents. The information that we incorporate by reference in this prospectus is considered to be part of this prospectus. Because we are incorporating by reference future filings with the SEC to the extent set forth herein, this prospectus is continually updated and those future filings may modify or supersede some of the information included or incorporated by reference in this prospectus. This means that you must look at all of the SEC filings that we incorporate by reference to determine if any of the statements in this prospectus or in any document previously incorporated by reference have been modified or superseded. This prospectus incorporates by reference the documents listed below and any future filings that we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (in each case, other than those documents or the portions of those documents furnished (but not filed) pursuant to Items 2.02 or 7.01 of any Current Report on Form 8-K), until the offering of the securities being registered under this prospectus is terminated or completed:

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We will provide without charge to each person, including any beneficial owner, to whom a copy of this prospectus is delivered, upon written or oral request of any such person, a copy of any or all of the documents that have been or may be incorporated by reference into this prospectus at no cost. Any such request may be made in writing or by telephoning us at the following address or telephone number:

Backblaze, Inc.

201 Baldwin Ave.

San Mateo, CA 94401

(650) 352-3738

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Shares

Class A Common Stock

Prospectus Supplement

Joint Book-running Managers

Oppenheimer & Co.     Needham & Company

November  , 2024