Mercor, a San Francisco-based startup that helps companies train and test AI systems, said on November 10 that it raised US$750 million in a series D round that valued the company at US$20 billion.

Benchmark, Nvidia, Felicis, Fundomo, and funds managed by Apollo affiliates joined the round. Mercor said it will use the capital to train and test AI agents on professional tasks.

Mercor began as an AI hiring platform. It now connects technology companies with subject-matter experts who help train, test, and improve AI models and agents.

The round follows a US$350 million financing in October 2025 that valued Mercor at about US$10 billion.

🔗 Source: Reuters