Huo Xing Finance reports that Sierra, an AI startup co-founded by Bret Taylor, Chairman of OpenAI’s Board, and former Google executive Clay Bavor, has completed a $950 million Series E funding round, bringing its post-money valuation to $15.8 billion. The round was led by Tiger Global and GV, the venture capital arm of Alphabet, with participation from existing investors including Benchmark, Sequoia, and Greenoaks. Sierra primarily provides AI customer service agents designed to automate customer support scenarios for enterprise clients. According to reports, Sierra’s annualized recurring revenue has surpassed $150 million across eight quarters. Bret Taylor stated that Sierra operates using a “model swarm” approach combined with proprietary fine-tuning layers to deliver AI agent services to enterprise customers. Previously, Sierra raised $175 million in October 2024 at a $4.5 billion valuation.
Sierra, an AI startup founded by the OpenAI Board Chair, raises $950 million in Series E funding at a $15.8 billion valuation.
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Summary
Sierra, an AI startup co-founded by OpenAI board chair Bret Taylor, has raised $950 million in Series E funding, valuing the company at $15.8 billion. The round was led by Tiger Global and GV, with participation from Benchmark, Sequoia, and Greenoaks. The funding announcement underscores Sierra’s relevance at the intersection of AI and crypto as it continues to scale its enterprise customer service solutions. The company has reported over $150 million in annualized recurring revenue for eight consecutive quarters.
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