Sierra
AI agent platform for enterprise customer experience, founded by former Salesforce co-CEO Bret Taylor.
- Founded
- 2023
- Headquarters
- San Francisco, CA
- Latest Round
- Series C
- Est. Valuation
- ~$10,000M
Investment Thesis
Sierra develops conversational AI agents that power enterprise customer experiences. Founded in 2023 by Bret Taylor (former Salesforce co-CEO and current OpenAI board chairman) and Clay Bavor (longtime Google executive), Sierra builds AI agents that can handle complex customer service interactions across industries.
Sierra's agents help hundreds of millions of people refinance homes, get roadside assistance, dispute charges, understand insurance deductibles, and more. The company has landed hundreds of customers including SoFi, Ramp, and Brex, reaching $100 million in enterprise ARR in under two years. With $635 million in total funding and a $10 billion valuation, Sierra is one of the fastest-growing AI companies in history.
Customer service is simultaneously the most important and most frustrating touchpoint for brands — consumers hate waiting on hold, and companies spend $350B+ annually on contact centers that still deliver inconsistent experiences.
Sierra deploys AI agents that handle customer service conversations with brand-appropriate tone, deep product knowledge, and the ability to take real actions (process returns, modify subscriptions, troubleshoot issues) — not just deflect to FAQs.
Founded by Bret Taylor (ex-Salesforce co-CEO, ex-Facebook CTO) and Clay Bavor (ex-Google VP); already deployed by ADT, SiriusXM, Sonos, and WeightWatchers, handling complex multi-turn conversations at enterprise scale.
LLMs can finally conduct nuanced, empathetic customer conversations while maintaining brand voice, and the economics are transformative — AI agents cost a fraction of human agents while being available 24/7 with zero hold time.