Halluminate

Halluminate (YC S25) is an AI training data and infrastructure company building realistic sandboxes and proprietary datasets to train computer-use and browser-use AI agents. The company provides fully managed, parallelizable environments modeled after popular enterprise software systems — such as Salesforce, Slack, and ticketing platforms — enabling AI researchers and labs to safely train and benchmark agents without the risks of operating on live production systems. Halluminate also offers high-quality evaluation services powered by expert annotators to identify and prioritize failure modes. Its customers include frontier AI labs and companies building the next generation of AI workers. Founded in 2024 by Jerry Wu and Wyatt Marshall (Cornell CS alumni), Halluminate is based in San Francisco and is backed by Y Combinator (S25 batch).