Mercor raises $750M Series D at $20B valuation to push into enterprise AI
What's the deal? Mercor has raised a $750 million Series D at a $20 billion valuation, co-founder and chief executive officer Brendan Foody said. The round doubles the $10 billion valuation it reached in its October 2025 Series C, and ranks among the largest Series D deals ever recorded in US jobs and recruitment — the top 1% of 56 comparable rounds.
What does Mercor do? The San Francisco company runs a network of more than 30,000 vetted experts — physicians, lawyers, engineers, and consultants — who write and grade the data used to train and test AI models. It also builds benchmarks and reinforcement-learning environments, and deploys AI agents inside enterprises.
What's the money for? Foody said the funding will "accelerate the enterprise business." The capital targets evaluations and post-training — tools for testing whether AI agents can reliably perform professional tasks — rather than simply supplying data to AI labs.
Why now? Mercor said its annualized gross revenue run rate reached $2 billion in June 2026, up from $1 billion four months earlier. In July, it acquired DeeptuneDealroom has a profile for this one. Try Dealroom →, a New York developer of simulated environments for training AI agents, extending a push beyond raw data into agent infrastructure.
What could go wrong? Customer concentration is a structural risk: one report put 91% of Mercor's first-half 2026 gross revenue from foundation-model companies. A March 2026 supply-chain breach exposed roughly 4TB of internal data, prompting MetaDealroom has a profile for this one. Try Dealroom → to pause its work with the company.
The signal: Mercor is betting that its lab relationships and rapid growth translate into durable enterprise demand in a crowded, fast-forming market for agent infrastructure. The round shows investors are still writing large cheques to firms positioned at the testing-and-deployment layer of enterprise AI — but Mercor now has to prove that demand outlasts the labs that built it.
Read more: CNBC
Image credit: Mercor
