Sierra

Sierra Technologies, Inc., founded in 2024 by Bret Taylor and Clay Bavor, specializes in creating autonomous AI agents designed to automate complex customer service interactions for businesses. Their platform, Agent OS, enables enterprises to develop AI agents capable of handling tasks such as issue resolution, account support, and task completion across various channels, including chat, voice, email, SMS, and WhatsApp. The platform supports both no-code and programmatic development, allowing organizations to deploy intelligent assistants tailored to their operations. By May 2026, Sierra had raised $950 million in a single funding round, valuing the company at $15.8 billion, and achieved $150 million in annual recurring revenue. Their client base includes companies like SoFi, Brex, Ramp, and SiriusXM. In June 2026, Sierra partnered with Kraken Technologies to enhance customer service in the utilities sector, integrating their AI agents into Kraken's global software infrastructure. This collaboration marks Sierra's expansion into the utilities industry, complementing its existing services in retail, financial, and healthcare sectors. The company's rapid growth and significant funding underscore the increasing importance of AI agents in business-customer interactions, positioning Sierra as a leading player in the enterprise AI sector.