Series D financing was led by Sequoia with Lead Edge joining as a major investor at an $850M valuation SAN FRANCISCO, December 5, 2018-- Amplitude, the leading product intelligence company, announced today that it has raised $80 million in Series D funding led by Sequoia Capital. Lead Edge joined the round as a major investor, and existing investors Benchmark Capital, IVP and Battery Ventures also participated. Sequoia partner Pat Grady has also joined Amplitude's Board of Directors.