Sepal AI
RL environment from Sepal AI
Sepal AI was a YC-backed (S24) San Francisco data-research company that built high-quality training data, expert-graded evaluation benchmarks, and reinforcement-learning environments for frontier LLMs, drawing on a network of 20k+ domain experts (PhDs, finance, medical, STEM). It was acquired by Mercor in February 2026; the team joined Mercor and its RL-environment and human-data work now sits under Mercor. It is therefore no longer ranked as an independent vendor. [what_they_sell: mixed]
- Publisher
- Sepal AI
- Domains
- Enterprise Workflows, Long-Horizon, Math
- Location
- San Francisco, USA
- Team size
- unknown people
- Data source
- rl-list
- Catalogued
- Website
- https://www.sepalai.com/
Catalogue entry from the RL Engineering daily scrape of public sources. Data reflects the 2026-08-30 snapshot.