Sierra raises $950M as AI agents race intensifies with Fortune 50 clients and rapid growth
Bret Taylor's Sierra closed a $950 million funding round led by Tiger Global and GV, pushing its valuation above $15 billion. The company hit $150 million in annual recurring revenue in just eight quarters and now serves over 40% of Fortune 50 companies. The raise signals intensifying competition as enterprises rush to deploy AI agents for customer service, with an estimated $400 billion market shifting toward automation.