idler was founded by Ivan Chub, Nalu Concepcion, Tony Goss in 2025.

Who are idler's investors?

idler's investors include Y Combinator.

Where is idler headquartered?

idler is headquartered in San Francisco, US.

idler

YC S25

San Francisco, US · Founded 2025 · 12 employees · Hiring · 1 known investors

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Idler develops training environments for reinforcement learning that enable AI models to learn programming through simulation of real-world coding tasks.

Developer Tools Enterprise Software Reinforcement LearningUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

idler was founded in 2025 by Ivan Chub, Nalu Concepcion, and Tony Goss.

Ivan Chub Founder & CEOIvan Chub is the founder of Idler and previously cofounded Dark Forest, 0xPARC, and Zupass. He has also held roles at Facebook, Dynasty, and AppSheet.

Nalu Concepcion FounderNalu Concepcion has backgrounds in engineering at Microsoft, product management at Poshmark, data science at PayMongo, and was a fellow at Notable Capital. They studied computer science with a focus on operations research and information engineering at Cornell University.

Tony Goss Founder & CTOTony Goss has worked on Dark Forest, Zupass, and projects involving US Census data. He has expertise in ultimate frisbee as both a competitive player and coach, and is experienced with the Dominion card game.

Investors · 1

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · Not right? Tell us

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Frequently asked questions

What does idler do?: Idler develops training environments for reinforcement learning that enable AI models to learn programming through simulation of real-world coding tasks.
Who founded idler?: idler was founded by Ivan Chub, Nalu Concepcion, Tony Goss in 2025.
Who are idler's investors?: idler's investors include Y Combinator.
Where is idler headquartered?: idler is headquartered in San Francisco, US.