
Expert data marketplace for AI training
mercor.com (opens in a new tab)Mercor organises human expertise for AI development, operating the layer between domain experts and frontier models. Millions of experts on its platform are paid over $4 million a day to train frontier models, making it a labour market as much as a data company. Its APEX benchmark family measures what AI actually does to professional work, and Mercor Enterprise applies the same infrastructure inside Fortune 500 companies — capturing how their best people work and translating that directly into agents. The company is profitable and works in person from San Francisco, New York and London.