Exhibit 99.1 Amplitude Announces Second Quarter 2025 Financial Results SAN FRANCISCO – August 6, 2025 – Amplitude, Inc. (Nasdaq: AMPL), the leading digital analytics platform, today announced financial results for its second quarter ended June 30, 2025. "Q2 was a strong quarter. We delivered the highest net-new ARR in nearly three years and saw record multi-product adoption," said Spenser Skates, CEO and co-founder of Amplitude. "This progress reflects our deliberate focus on the enterprise and platform exp ...