Idler, founded in 2025, builds reinforcement learning environments designed to train AI models to write code at expert human levels. Its core product provides training scenarios based on real-world coding challenges, intended to prepare models for production-level complexity. The company serves AI foundation labs and operates within the AI/ML vertical.
Headquartered in San Francisco's Dogpatch neighborhood, Idler is a small but ambitious team backed by Y Combinator. Despite being bootstrapped, the company has achieved $440K in revenue and secured a landmark multimillion-dollar contract. It is rapidly expanding to meet market demand.
Idler's technical work spans reinforcement learning, AI model training, and coding AI. The company emphasizes that advanced AI should be trained on work that is rigorous, responsibly produced, and grounded in real expertise.
