Amplitude Results Presentation Deck

(8 GAAP to Non-GAAP Reconciliation Reconciliation of gross profit and gross margin GAAP gross profit Plus: stock-based compensation expense and related employer payroll taxes¹ Plus: amortization of acquired intangible assets Non-GAAP gross profit GAAP gross margin² Non-GAAP adjustments Non-GAAP gross margin² Reconciliation of operating loss and operating margin GAAP loss from operations Plus: stock-based compensation expense and related employer payroll taxes¹ Plus: amortization of acquired intangible assets Plus: direct listing expenses Non-GAAP loss from operations GAAP operating margin² Non-GAAP adjustments Non-GAAP operating margin² Reconciliation of net loss GAAP net loss Plus: stock-based compensation expense and related employer payroll taxes¹ 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 December 31, 2022 2021 46,015 $ 2,084 500 48,599 70.5% 4.0% 74.5% (25,798) 20,638 500 (4,660) (39.5%) 32.4% (7.1%) (24,045) 20,638 500 $ $ 113,104 $ (2,907) $ (0.21) 0.19 (0.03) $ $ 34,032 1,043 500 35,575 68.9% 3.1% 72.0% (21,485) 16,022 500 (4,963) (43.5%) 33.4% (10.0%) (21,902) 16,022 500 (5.380) $ 107,925 $ $ $ $ (0.20) 0.15 (0.05) $ $ Year Ended December 31, 2022 2021 167,625 $ 6,468 2,017 176,110 70.4% 3.6% 74.0% (96,562) 68,297 2,017 (26,248) (40.6%) 29.5% (11.0%) (93,377) 68,297 2,017 (23,063) (0.84) 0.63 (0.21) 111,437 $ $ $ $ $ 115,497 1,952 1,651 119,100 69.1% 2.2% 71.2% (74,149) 39,667 1,651 18,191 (14,640) (44.3%) 35.6% (8.8%) (74,983) 39,667 1,651 18,191 (15,474) (1.46) 1.16 (0.30) 51,360 ¹Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transaction 2 Margin represents percentage of GAAP revenue © 2023 Amplitude Inc. All Rights Reserved. 25

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