Wang will remain involved with Scale AI as a board member and is expected to bring several employees with him to Meta. He has led the company since co-founding it in 2016 to supply high-quality labeled data—sourced through human contractors—for training A.I. systems.

Scale AI plans to promote Chief Strategy Officer Jason Droege to serve as its next chief executive officer following a multibillion-dollar investment from Meta Platforms Inc., according to two people familiar with the matter.