Fastly: Innovators Platform

Legal Disclosure Important Notice This presentation includes forward-looking statements. All statements contained in this presentation other than statements of historical facts, including our business strategy and plans and our objectives for future operations, as well as our financial performance and our long-term target operating model, are forward-looking statements. The words "anticipate," believe," "continue," "estimate," "expect," "intend," "may," "will" and similar expressions are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks and uncertainties. The future events and trends discussed in this presentation may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance, achievements or events and circumstances reflected in the forward-looking statements will occur. Except to the extent required by law, we do not undertake to update any of these forward-looking statements after the date of this presentation to conform these statements to actual results or revised expectations. For a complete discussion of factors that could materially affect our financial results and operations, please refer to the reports we file from time to time with the SEC, including our Annual Report on Form 10-K for the fiscal year ended December 31, 2019, and our subsequent quarterly reports on Form 10-Q. Copies of reports we file with the SEC are posted on our website and are available from Fastly without charge. In addition to the financials presented in accordance with U.S. generally accepted accounting principles ("GAAP"), this presentation includes certain non-GAAP financial measures. We use the following non-GAAP financial information to evaluate our ongoing operations and for internal planning and forecasting purposes: Fastly uses the following non-GAAP measures of financial performance: non-GAAP gross profit, non-GAAP net loss, non- GAAP basic and diluted net loss per common share, non-GAAP research and development, non-GAAP sales and marketing, non-GAAP general and administrative, and adjusted EBITDA. The presentation of this additional financial information is not intended to be considered in isolation from, as a substitute for, or superior to, the financial information prepared and presented in accordance with GAAP. These non-GAAP measures have limitations in that they do not reflect all of the amounts associated with our results of operations as determined in accordance with GAAP. In addition, these non-GAAP financial measures may be different from the non-GAAP financial measures used by other companies. These non-GAAP measures should only be used to evaluate our results of operations in conjunction with the corresponding GAAP measures. Management compensates for these limitations by reconciling these non-GAAP financial measures to the most comparable GAAP financial measures. We urge you to review the reconciliation of our non-GAAP financial measures to the most directly comparable GAAP financial measures set forth in the Appendix, and not to rely on any single financial measure to evaluate our business. This presentation also contains estimates and other statistical data made by independent parties and by us relating to market size and growth and other data about our industry. This data involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. Neither we nor any other person makes any representation as to the accuracy or completeness of such data or undertakes any obligation to update such data after the date of this presentation. In addition, projections, assumptions and estimates of our future performance and the future performance of the markets in which we operate are necessarily subject to a high degree of uncertainty and risk. Please refer to "Management's Discussion and Analysis of Financial Condition and Results of Operations - Key Business Metrics" in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, which is incorporated by reference into the prospectus contained in the registration statement for the Company's definitions of Dollar-Based Net Expansion Rate ("DBNER") and enterprise customers. Please refer to "Management's Discussion and Analysis of Financial Condition and Results of Operations - Key Business Metrics" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019, which is incorporated by reference into the prospectus contained in the registration statement for the Company's definition of annual revenue retention rate. fastly. ©2020 Confidential 24

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