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Idler
Founders
Idler is a frontier AI data research lab that builds evaluations and reinforcement learning environments for the world's leading AI model labs. Founded in 2025 and part of Y Combinator's Summer 2025 batch, Idler's proprietary environments simulate real-world coding scenarios, enabling frontier AI models to continuously improve at long-horizon coding tasks. The company operates on a contract basis with top foundation labs and has secured multimillion-dollar deals, including a $9M Paradigm-led seed round.
Company Founded in 2025
SaaS