Sierra, a pioneering technology firm specializing in the creation of enterprise-grade AI customer service agents, has successfully closed a $350 million funding round, post-money valuing the company at a whopping $10 billion. This round was spearheaded by investors such as Greenoaks Capital. Sierra was jointly founded by Brett Taylor, the Chairman of the OpenAI Board, and Clay Bavor, a former executive at Google. The company's proprietary "Intelligent Agent Operating System" offers enterprises highly personalized, omni-channel AI customer service solutions. It is anticipated that Sierra's annual recurring revenue will soon surpass the $100 million mark.