Mercor AI Startup Reaches $10B Valuation After $350M Raise

What happened

Mercor, an AI startup that supports training of top AI models like ChatGPT, 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 rapid valuation growth highlights the increasing demand for specialized AI training expertise.
• The company plays a key role in enabling AI models to incorporate human feedback and improve over time.
• Mercor’s position strengthens as major AI labs seek new data labeling partners following industry shifts.

Key facts

1. 1. Mercor raised $350 million in its latest 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.