Mercor raises $750M Series D at $20B valuation

Mercor, a San Francisco-based platform connecting enterprises with human specialists to train and evaluate AI models, has raised $750 million in a Series D round ^[1]. The equity financing values the company at $20 billion, according to reports ^[1].

The financing drew backing from corporate investors Nvidia, Salesforce, and Zoom, alongside venture firms Benchmark, Felicis, General Catalyst, G Squared, and Sapphire Ventures ^[1]. The transaction also incorporates an employee-share tender mechanism ^[1].

Brendan Foody, Adarsh Hiremath, and Surya Midha launched the startup in 2023. Mercor connects enterprises with human contractors to perform AI model evaluation, training, and refinement tasks ^[1]. According to the company, the fresh capital will fund infrastructure expansion and ongoing research targeting model evaluations, post-training methods, and specialized environments for training autonomous software agents ^[1].

The $20 billion valuation marks a double from October 2025, when Mercor completed a $350 million funding round at a $10 billion valuation ^[1].