Sierra, the enterprise AI agent startup founded in 2024 by Bret Taylor and Clay Bavor, has secured a $350 million funding round led by Greenoaks Capital, valuing the company at $10 billion. The latest raise brings Sierra’s total funding to $635 million, with previous backing from Sequoia, Benchmark, ICONIQ, Thrive Capital, and others.
In just 18 months, Sierra has signed on hundreds of enterprise customers, including SoFi, Ramp, and Brex, to deploy its AI-powered customer service agents. The company’s rapid growth builds on the founders’ long experience in enterprise and consumer software, with Taylor’s leadership roles at Salesforce, Facebook, and Google, and Bavor’s tenure managing Gmail and Google Drive.
The new funding underscores strong investor confidence in Sierra’s mission to redefine enterprise customer engagement with scalable, intelligent AI agents.
