AI · founded 2023

Sierra

Conversational AI agents for customer experience. Its public sector arm, FedRAMP High certified, builds agents for tax, benefits and fraud claims work at government agencies.

Private, San Francisco. Raised $950M at a $15.8B valuation (May 2026).

sierra.ai

Founders

Bret Taylor, Clay Bavor

Palantir alumni at Sierra

• Natalie Meurer, Head of Public Sector

Sources

• CNBC, May 2026
• Sierra, FedRAMP High