Why Sierra matters
Sierra raised $950 million at a $15.8 billion post-money valuation on May 4, 2026, led by Tiger Global and GV, with Benchmark, Sequoia, and Greenoaks participating. TechCrunch reported the company reached $100 million in annual recurring revenue in November 2025, less than two years after launch. Co-founded by Bret Taylor, Sierra says more than 40% of Fortune 50 companies are customers.
The numberRaised $950 million at a $15.8 billion valuation on May 4, 2026
On The Agentic 80
Listed under Customer and employee service agents. Agents that answer, resolve, and escalate.
Quick answers
- What does Sierra do?
- Builds customer service AI agents for large enterprises, priced per resolved conversation. Sierra raised $950 million at a $15.8 billion post-money valuation on May 4, 2026, led by Tiger Global and GV, with Benchmark, Sequoia, and Greenoaks participating.
- What AI capabilities does Sierra offer?
- Sierra provides customer service AI agents for large enterprises. Agent OS is the platform businesses use to configure those agents with brand guidance, policies, and connections to order, account, and knowledge systems. The agents answer customer questions, complete supported actions such as order changes, and transfer conversations to human agents when a case needs a person. Sierra typically charges per resolved conversation.
- Why is Sierra on The Agentic 80?
- Sierra is listed under Customer and employee service agents. Agents that answer, resolve, and escalate. Raised $950 million at a $15.8 billion valuation on May 4, 2026.
- Where is Sierra based, and who owns it?
- Sierra is based in San Francisco, CA, was founded in 2023 and is private, Series E.