Amplitude Results Presentation Deck

A GAAP to Non-GAAP Reconciliation Reconciliation of gross profit and gross margin GAAP gross profit © 2021 Amplitude Inc. All rights reserved. Plus: stock-based compensation expense and employer taxes on NSOS Plus: amortization of acquired intangible assets Non-GAAP gross profit 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 employer taxes on NSOS 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 Three Months Ended June 30, 2021 2020 S S S S S S S 27.119 S 247 429 27,795 S 69.1% 1.7% 70.8% S (9,747) S 3,086 429 2,086 (4.146) S (24.8%) 14.3% (10.5%) (10,083) S 3,086 429 2,086 (4,482) S GAAP net loss Plus: stock-based compensation expense and employer taxes on NSOs 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 Non-GAAP adjustments to net loss Non-GAAP net loss per share, basic 29,681 24,684 Weighted-average shares used in GAAP and non-GAAP per share calculation, basic and diluted ¹ Stock-based compensation expense-related charges include employer payroll tax-related expenses on employee stock transactions. 2 Margin represents percentage of GAAP revenue 16,486 114 (0.34) $ 0.19 (0.15) S 16,600 69.6% 0.5% 70.1% (11,547) 9,409 224 (1.914) (48.7%) 40.7% (8.0%) (11,715) 9,409 224 (2,082) (0.47) 0.39 (0.08) 18

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