Amplitude Results Presentation Deck

A Guidance (As of September 21, 2021) Q3 2021 $43 - $44M +63% to +67% Y/Y $(5M) - $(4M) $(0.15) - $(0.12) 34.2M shares Revenue Non-GAAP Loss from Operations Non-GAAP Net Loss Per Share Weighted Average Shares Outstanding Expect to increase 2022 revenue by over 40% © 2021 Amplitude Inc. All rights reserved. FY 2021 $160 $162M +56% to 58% Y/Y $(25) - $(23M) $(0.50) - $(0.46) 49.6M shares ¹ A reconciliation to GAAP loss from operations and GAAP net loss per share has not been provided as the quantification of certain items included in the calculation of GAAP loss from operations and GAAP net loss per share cannot be reasonably calculated or predicted at this time without unreasonable efforts. For example, the non-GAAP adjustment for stock-based compensation expense requires additional inputs such as the number and value of awards granted that are not currently ascertainable, and the non-GAAP adjustment for amortization of acquired intangible assets depends on the timing and value of intangible assets acquired that cannot be accurately forecasted. e 15

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