According to CNBC, Sierra, an AI startup founded by OpenAI Chairman Bret Taylor and former Google executive Clay Bavor, has raised $950 million in Series E funding, with a post investment valuation of $15.8 billion. This round of financing is led by Tiger Global and GV, a venture capital firm under Alphabet, with participation from Benchmark, Sequoia, Greenoaks, and others. Sierra focuses on providing AI customer service agent products for enterprises, supporting automated customer service scenarios. It is reported that its annual recurring income has exceeded $150 million within 8 quarters.