Amplitude Results Presentation Deck

(8 GAAP to Non-GAAP Reconciliation Reconciliation of operating expenses GAAP research and development Less: stock-based compensation expense and related employer payroll taxes¹ Less: amortization of acquired intangible assets Non-GAAP research and development GAAP research and development as percentage of revenue Non-GAAP research and development as percentage of revenue GAAP sales and marketing Less: stock-based compensation expense and related employer payroll taxes¹ Less: direct listing expenses Non-GAAP sales and marketing GAAP sales and marketing as percentage of revenue Non-GAAP sales and marketing as percentage of revenue GAAP general and administrative Less: stock-based compensation expense and related employer payroll taxes¹ Less: direct listing expenses Non-GAAP general and administrative GAAP general and administrative as percentage of revenue Non-GAAP general and administrative as percentage of revenue Note: Certain figures may not sum due to rounding $ $ $ $ $ $ Three Months Ended December 31, 2022 2021 22,192 $ (8,815) 13,377 34.0% 20.5% 35,169 (5,760) 29,409 $ 10,473 22.1% 16.0% $ $ 53.9% 45.1% 14,452 $ (3,979) $ 14,229 (4,446) 9,783 28.8% 19.8% 27,016 (5,149) 21,867 54.7% 44.2% 14,272 (5,384) 8,888 28.9% 18.0% $ $ $ $ $ $ Year Ended December 31, 2022 2021 80,589 (28,476) 52,113 $ 33.9% 21.9% 129,962 (17,386) 112,576 54.6% 47.3% $ 37,669 22.5% 15.8% $ $ 53,636 $ (15,967) $ 48,251 (16,469) 31,782 28.8% 19.0% 86,025 (9,693) (13) 76,319 51.4% 45.6% 55,370 (11,553) (18,178) 25,639 33.1% 15.3% ¹ Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transaction © 2023 Amplitude Inc. All Rights Reserved. 26

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