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 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 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 March 31, 2023 2022 23,708 (9,033) 14,675 35.7% 22.1% 39,133 $ (6,681) 32,452 58.9% 48.8% 13,622 (3,348) 10.274 20.5% 15.5% $ S S 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% ¹ Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transaction © 2023 Amplitude Inc. All Rights Reserved. 21

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