Bret Taylor’s Sierra raises $350M at a $10B valuation

Bret Taylor’s Sierra raises $350M at a $10B valuation

Customer service AI agent startup Sierra claims to have hundreds of customers, including SoFi, Ramp, and Brex, among others.

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https://techcrunch.com/2025/09/04/bret-taylors-sierra-raises-350m-at-a-10b-valuation/