Mercor
Expert-network marketplace supplying PhD-level training data
Mercor built a marketplace matching domain experts (doctors, lawyers, PhDs) to frontier labs that need specialized reasoning and evaluation data, reaching a multi-billion-dollar valuation in 2025. It reflects the pivot from bulk labeling to scarce expert judgment for post-training and evals. Labs increasingly compete for its expert supply as generic web data is exhausted.
How it fits the stack
Mercor with what it depends on (above) and what it feeds (below). The figure renders as a crawlable diagram and upgrades to an interactive 3D graph as it scrolls into view.
Mercor in the AI stack. Mercor with its immediate upstream dependencies (top) and downstream dependents (bottom) in the AI value chain. Hover a node in 3D, or read the full relationships below.
Graph data (text) — 3 entities, 2 relationships
- Anthropic —supplies→ Mercor
- OpenAI —supplies→ Mercor