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idler

YC S25

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

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

Developer ToolsEnterprise SoftwareReinforcement LearningUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

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

ICIvan Chub
Ivan Chubin𝕏Founder & 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.
NCNalu Concepcion
Nalu Concepcionin𝕏FounderNalu 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.
TGTony Goss
Tony Gossin𝕏Founder & 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 CombinatorSan Francisco · $500K

Images

idler photo

Competitors · 1

by search overlap
AI Driller3 shared keywordsAI Driller provides a cloud-based operations platform for drilling and completions teams to plan, engineer, monitor, and execute wells in a single interface. The platform consolidates drilling, directional, casing, and inventory data with real-time analytics and reporting tools for oil and gas operators and drilling contractors.

Companies competing with idler for the same Google search keywords, organic and paid, via search-intersection analysis.

In the news

Interview: Stewart Lee | Idleridler.co.uk · Nov 2025Idler | StartupHub.aistartuphub.ai · Jul 2025We have reached our funding target | Idleridler.co.ukIdler Funding: $1M | Complete Analysis | Extruct AIextruct.ai

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.