Ex-Salesforce co-CEO Bret Taylor’s Sierra is the latest $10 billion AI startup

Bret Taylor’s artificial intelligence startup Sierra has just joined an exclusive club: The company sports a new $10 billion valuation after raising $350 million in fresh capital.

Sierra is one of just a handful of AI startups, including OpenAI, Anthropic, xAI, Safe Superintelligence and Thinking Machines that are valued at or above $10 billion.

https://www.cnbc.com/2025/09/04/bret-taylor-sierra-ai-startup-salesforce-openai.html