Sierra

Sierra is an AI platform company founded in 2023 by Bret Taylor and Clay Bavor, headquartered in San Francisco, California. Taylor previously served as co-CEO of Salesforce and chairman of Twitter's board, while Bavor was a longtime Google executive who led Google Labs and Google VR/AR efforts. The company focuses on building AI-powered conversational agents designed for enterprise customer experience applications.

Sierra's primary product is a platform that allows businesses to deploy AI agents capable of handling customer support interactions across channels including chat and voice. The agents are designed to resolve issues autonomously rather than simply routing customers to human agents. Reported customers include companies such as SiriusXM, Sonos, and WeightWatchers, which use the platform for customer-facing support operations.

Sierra raised a $175 million Series B round in 2024 at a reported valuation of approximately $4.5 billion, following an earlier $110 million funding round. Investors include Sequoia Capital and Greenoaks Capital. The company reached a reported annualized revenue run rate in the tens of millions within its first year of operation.