Sierra Secures $950M to Compete for Leadership in Enterprise AI Market

Mon, 04 May 2026 22:23:00 +0200

Bret Taylor’s AI startup, Sierra, has raised $950 million in a funding round led by Tiger Global and GV, pushing its post-money valuation above $15 billion. The company, which has been rapidly expanding its platform for AI-driven customer experiences, aims to become the global leader in the sector. Sierra’s platform is already handling billions of interactions across various industries, from mortgage refinancing to processing insurance claims. The startup claims to have more than 40% of the Fortune 50 as its customers. Following a significant increase in annual recurring revenue, Sierra is focusing on expanding its offerings, including launching Ghostwriter—a tool that autonomously creates and deploys specialized agents based on user input. This funding round highlights the growing urgency among enterprises to adopt AI, even as they face high initial costs. Sierra’s growth trajectory is in line with the broader trend in enterprise AI, where companies like Uber are leveraging these tool