Bret Taylor's Sierra raises nearly $1 billion months after last capital push

Bret Taylor, the former Twitter and Salesforce executive, has quietly assembled nearly $1 billion for his artificial intelligence startup Sierra in a stunning show of investor confidence that arrives just months after his last funding round—a remarkably swift capital injection that underscores just how ravenously venture firms are competing for access to experienced AI founders. The speed of the fundraising, coming at a time when many startups struggle to raise anything at all, suggests that Taylor's combination of big tech pedigree and an AI pitch has become the rare founder-stage equation that can move mountains in a notoriously fickle market. What's unclear is whether Sierra can convert that extraordinary firepower into products and revenue before the current AI

CNBC·May 6