TechCrunch Follow 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. AI and ML News on Bluesky @ai-news.at.thenote.app bsky.app https://techcrunch.com/2025/09/04/bret-taylors-sierra-raises-350m-at-a-10b-valuation/ techcrunch.com
