Mercor AI Startup Valued at $10B After $350M Funding Round

What happened

Mercor, an AI startup that supports training top AI models, completed a $350 million Series C funding round. This round valued the company at $10 billion, a fivefold increase from its $2 billion valuation eight months earlier. Mercor connects AI labs with specialized experts to improve AI model training.

Why it matters

• Mercor’s growth reflects rising demand for specialized human expertise in AI model development.
• The company’s platform supports reinforcement learning by integrating human feedback into AI training.
• Mercor’s valuation surge highlights its key role amid shifts in AI data labeling partnerships.

Key facts

1. 1. Mercor raised $350 million in a Series C funding round.
2. 2. The company’s valuation increased from $2 billion in February 2025 to $10 billion in October 2025.
3. 3. The funding round included investors such as Felicis Ventures, Benchmark, General Catalyst, and Robinhood Ventures.