AI data/expert network company Mercor raises $750M Series D at $20B valuation

November 11: According to official news, AI data/expert network company Mercor announced the completion of a $750 million Series D funding round at a $20 billion valuation, double its $10 billion valuation in October 2025. Investors in this round include Benchmark, Felicis, Fundomo, Apollo-affiliated funds, G Squared, General Catalyst, GladeBrook Capital, Nvidia, Salesforce, Sapphire Ventures, StepStone VC, XTX Ventures and Zoom.

Mercor is a San Francisco-based AI data/expert network company founded in 2023. It initially built an AI recruiting platform before pivoting to supplying high-quality human experts — such as physicians, lawyers and engineers — to frontier AI labs (including OpenAI) for model post-training, evaluation, RLHF and similar work. Experts are paid by the hour.