Who Sells Data: A Directory of AI Training Data and RL Environment Vendors

Summary

Who Sells Data is a register maintained by Secludy AI that catalogs 161 unranked vendors serving AI labs, startups, developers, and enterprises. The directory covers reinforcement-learning environments, human and synthetic training data, evaluations and benchmarks, annotation, simulation, and RL infrastructure. Vendors can be filtered by offering, data source, task domain, and active or acquired status, then sorted by name, recent verification, or publicly reported funding. Listings span coding, computer use, enterprise workflows, finance, legal, medical, science, security, robotics, games, and other areas. Each profile is intended to link individual claims to their sources, and users can compare up to four vendors. The page also explains that SOC 2 and deployment details remain on vendor profiles and comparisons rather than serving as register-wide filters. Secludy describes its own approach as replacing real identities with stable synthetic ones across files, application state, screenshots, and trajectories to preserve training and evaluation context while removing personally identifiable and customer data.