Labelbox announced a Series E of more than US$100 million at a US$1.25 billion pre-money valuation to advance reinforcement-learning environments and enterprise agents, the company said on 14 October 2026.
Training-data platforms are raising late-stage capital as frontier labs and enterprises buy RL environments and managed labelling agents. Buyers still need proof of data quality, workforce controls and IP terms.
Labelbox sells data, Horizon RL environments and Recursion Managed Agents. Infinitum Partners led the round, with Wipro Ventures, a16z, B Capital and others participating.
ML platform owners should insist on quality SLAs on their domains — before treating any Series E headline as a completed data-factory strategy.