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 taxes 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 taxes 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 taxes 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 June 30, 2022 2021 20,306 (7.533) 12,773 34.9% 22.0% 34,135 (3,268) $ 8,592 19.3% 14.8% $ 30,867 $ 58.7% 53.1% 11,212 (2,620) $ $ 8,544 (1,196) 7,348 21.8% 18.7% 20,040 (870) (13) 19,157 51.1% 48.8% 8,282 (773) (2,073) 5,436 21.1% 13.8% $ $ $ $ $ $ Six Months Ended June 30, 2022 2021 36,807 (12,015) 24,792 33.1% 22.3% 62,265 $ (6,500) 55,765 56.0% 50.2% 25,574 (7,760) 17,814 23.0% 16.0% $ $ $ $ 15,529 (2,129) 13,400 21.5% 18.5% 36,810 (1,709) (13) 35,088 50.9% 48.5% 13,531 (1,393) (2,126) 10,012 18.7% 13.8% ¹Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transactions. Ⓒ2022 Amplitude Inc. Confidential. All Rights Reserved. 22

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