TechCrunch: Sierra raises $950M as enterprise AI competition intensifies

Sierra, the enterprise AI company co-founded by Bret Taylor (former Salesforce co-CEO and current OpenAI board chair), is closing a $950 million funding round led by Tiger Global and GV. The round pushes Sierra’s post-money valuation above $15 billion, and the company now holds more than $1 billion in total available capital.

Sierra builds AI agents for enterprise customer interactions — mortgage refinancing, insurance claims processing, returns management — and has scaled from a handful of design partners to more than 40% of the Fortune 50 as customers. In the three months before the announcement, ARR grew from $100 million to $150 million. The company also launched Ghostwriter, a tool that allows business users to describe what they need in plain language and have specialized agents created automatically, without requiring developer involvement.

For product managers, Sierra’s trajectory carries two signals. First, AI agents handling customer journeys — not just internal workflows — are already in procurement cycles at major enterprises, not approaching them. Second, CEO Bret Taylor’s argument that “the era of clicking buttons is over” is becoming a design brief in itself: enterprise software built around autonomous workflows rather than UI navigation is what buyers at the top of the market are starting to expect. Product teams evaluating their roadmaps should ask which customer-facing flows are candidates for agent-first redesign.