Fastly Investor Presentation Deck

Building To Support Increased Scale and Growth Non-GAAP Sales & Marketing as a % of Revenue* 34% CY 2018 23% CY 2018 34% 15% CY 2019 CY 2018 Non-GAAP Research & Development as a % of Revenue** 22% CY 2019 28% 18% CY 2020 CY 2019 20% CY 2020 34% Non-GAAP General & Administrative as a % of Revenue** 19% Q4 19 CY 2020 21% Q4 19 19% *** Q419 33% Q4 20 22% Q4 20 20% Q4 20 Aggressively pursuing market share while balancing capital optimization for go-to-market Increasing demand generation and account-based marketing Meaningful investments in the platform to further enhance key differentiators Applications built by leveraging a single network architecture Investing in operational scale to support rapid growth, IPO compliance and M&A integration *Non-GAAP Sales & Marketing Expense is defined as GAAP Sales and Marketing Expense plus stock-based compensation related to sales and marketing plus amortization of intangible assets related to sales and marketing, please see appendix for reconciliation of Non-GAAP to GAAP metrics ** Non-GAAP Research & Development Expense is defined as GAAP Research and Development Expense plus stock-based compensation related to research and development, please see appendix for reconciliation of Non-GAAP to GAAP metrics Ⓒ2021 Fastly.dneP General & Administrative Expense is defined as GAAP General and Administrative Expense plus stock-based compensation related to general and administrative plus acquisition-related expenses, please see appendix for reconciliation of Non-GAAP to GAAP metrics

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