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    AngelBacked

    Sierra

    Artificial Intelligence (AI)San Francisco, California, United StatesSeries E$1.6B total fundingsierra.ai
    Latest funding:$950.0M · Series E (May 4, 2026)

    Angel investors who backed Sierra

    3 investors in our database backed Sierra.

    Peter Fenton

    General Partner

    Benchmark

    Megan Quinn

    Angel Investor & Board Director

    Google

    Austin Liang

    Principal

    ICONIQ

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