Amplitude Results Presentation Deck

A GAAP to Non-GAAP Reconciliation Reconciliation of gross profit and gross margin GAAP gross profit Plus: stock-based compensation expense and related employer payroll taxes Plus: amortization of acquired intangible assets Non-GAAP gross profit © 2021 Amplitude Inc. All rights reserved. GAAP gross margin Non-GAAP adjustments Non-GAAP gross margin Reconciliation of operating loss and operating margin GAAP loss from operations Plus: stock-based compensation expense and related employer payroll taxes Plus: amortization of acquired intangible assets Plus: direct listing expenses Non-GAAP loss from operations GAAP operating margin Non-GAAP adjustments Non-GAAP operating margin Reconciliation of net loss GAAP net loss Plus: stock-based compensation expense and related employer payroll taxes Plus: amortization of acquired intangible assets Plus: direct listing expenses Non-GAAP net loss Reconciliation of net loss per share GAAP net loss per share, basic and diluted Non-GAAP adjustments to net loss Non-GAAP net loss per share, basic and diluted Weighted-average shares used in GAAP and non-GAAP per share calculation, basic and diluted Note: Certain figures may not sum due to rounding $ $ $ $ $ $ $ $ Three Months Ended September 30, 2021 2020 31,491 426 500 32,417 69.3% 2.0% 71.3% (36,768) 17,931 500 16,052 (2,285) (80.8%) 75.8% (5.0%) (36,559) 17,931 (0.93) 0.88 (0.05) $ 500 16,052 (2,076) $ 39,301 $ $ $ 18,601 167 18,768 70.5% 0.6% 71.2% (2,385) 1,463 227 (695) (9.0%) 6.4% (2.6%) (2,574) 1,463 227 (884) (0.10) 0.07 (0.03) 25,147 ¹ Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transactions. 2 Margin represents percentage of GAAP revenue 21

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