Amplitude Results Presentation Deck

A 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 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 Ⓒ2022 Amplitude Inc. All rights reserved. $ $ $ $ Three Months Ended March 31, 2022 2021 16,501 (4,482) 12,019 31.1% 22.6% 28,130 (3,233) 24,897 53.0% 46.9% 14,362 $ (5,140) 9,222 27.1% 17.4% $ $ $ $ 6,985 (933) 6,052 21.1% 18.3% 16,770 (839) 15,931 50.6% 48.1% 5,249 (620) (53) 4,576 15.9% 13.8% ¹ Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transactions. 25

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