Mercor, the San Francisco startup that pays experts to train and test AI models, has raised $750m in a Series D round that values it at $20bn. The valuation is double the $10bn Mercor reached when it raised $350m in October 2025. Benchmark, Felicis, Fundomo, General Catalyst, Nvidia, Salesforce, Sapphire Ventures and Zoom joined the […]This story continues at The Next Web