What happened
San Francisco-based Mercor pays experts to produce data for training and testing AI models. The company has closed a $750m Series D funding round.
Valuation doubles
The new round values Mercor at $20bn, exactly double the $10bn valuation it reached when it raised $350m in October 2025. In roughly a year, its valuation has doubled.
The investors
The round included Benchmark, Felicis, Fundomo, General Catalyst, NVIDIA, Salesforce, Sapphire Ventures and Zoom. The presence of companies at the centre of the AI ecosystem, such as NVIDIA and Salesforce, signals growing demand for high-quality human data in model training.
Why it matters
As large language models and agents advance, the need for domain experts to train and verify these systems is not going away. Mercor's model connects professionals across fields to supply data for models. The investment shows how large a line item human-labour-based data production has become in the AI economy.
