Bret Taylor is the founder of Sierra. Sierra has raised $950M, latest Series C $950M (2026). AI Infrastructure · San Francisco, CA.
Bret Taylor is the founder of Sierra. Sierra operates in AI Infrastructure and is based in San Francisco, CA. Sierra has raised $950M, latest Series C $950M (2026). Backers on record include Ari Stiegler, Chase Coleman, Elad Gil, Jake Flomenberg, Sarah Guo, Sequoia Capital and 4 others.
This founder profile draws on disclosed rounds, filings and investor records in the StartupFundraising database and is updated as new funding is recorded. Founders raising now use profiles like this one to study comparable AI Infrastructure journeys in San Francisco — who backed them, at what stage, and how much they raised.
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