Overview

• Greenoaks led the latest round, which establishes a $10 billion valuation for the company.
• Sierra has raised $635 million to date, with prior backers including Sequoia, Benchmark, ICONIQ and Thrive Capital.
• The company builds autonomous customer-service agents that complete tasks on behalf of users.
• Sierra says its agents already assist hundreds of millions of people with tasks such as refinancing, ordering food and troubleshooting technology.
• The startup claims hundreds of enterprise customers, citing SoFi, Ramp and Brex among named clients.