Brendan Foody started Mercor when he was 19 years old. Now he’s 23, worth billions on paper, and running one of the fastest-growing companies in AI history. On Thursday, his $10 billion business acquired startup Deeptune, a company Foody quietly helped fund months before buying it, Fortune learned exclusively.
Deeptune, an Andreessen Horowitz-backed startup, builds simulation environments where AI agents practice real-world tasks before touching production systems—think a flight simulator, but for AI agents learning how to use Excel, Salesforce, and Slack. Financial terms weren’t disclosed. And according to Mercor, Deeptune’s team will be relocating to New York.
Foody was listed as an angel investor in Deeptune’s $43 million Series A just three months before the acquisition closed. Foody told me the angel check was written with acquisition already in mind: “It was in a lot of ways the main motivation, actually.” Call it relationship-building or call it a strategic hold. Either way, a16z funded Foody’s future acquisition target, and Foody got a front-row seat before making his move.
The deal is also a direct answer to where the AI training market is heading. Frontier labs (and Mercor customers) like Anthropic and OpenAI now need full digital replicas of enterprise software environments where their agents can practice, fail, and learn. Mercor’s network of more than five million domain experts already builds the tasks and scoring rubrics that tell a model whether it did the job right. Deeptune builds the apps those tasks run inside. Together, they cover the full stack.
