YCS25· AI· Devtoolsidler
Hill-climb any benchmark, for any model, in any domain.
Founders
- Ivan ChubFounder/CEO
- Nalu ConcepcionFounder
- Tony GossFounder
Same space
Competitors
Closest in what they build, same category.
EnactS26Real-world RL environments for robotics modelsShared: reinforcement learningActive
AnchorheadW26Evals for frontier research agentsShared: reinforcement learningActive
hillclimbF25Training Data for Recursive Self-ImprovementShared: reinforcement learningActive
AviroX25Environments for Long Horizon WorkShared: reinforcement learningActive
HUDW25Platform for building RL environments and evalsShared: reinforcement learningActive
Adjacent
Overlapping tags, a different niche.
Vibrant LabsW24Autonomously scaling environmentsShared: reinforcement learningActive
TraverseW26Research lab solving non-verifiable workShared: reinforcement learningActive
CartpoleX25Building reinforcement learning environmentsShared: reinforcement learningActive
UnifyW23Models that keep learningShared: reinforcement learningActive
CoArenaS26The biggest crowdsourced benchmark for Computer-UseShared: reinforcement learningActive
Also from S25 in AI
Batchmates in Summer 2025.
Outside YC
Similar companies on companies.fru.dev.
About idler
idler is a frontier data research lab. We build the evals and environments that the world's leading frontier labs use to measure and train their models.
San Francisco, CA, USA
idler: questions
Which YC batch was idler in?
idler was in Y Combinator's Summer 2025 batch (S25).
Is idler still active?
Y Combinator lists idler as active.
Who founded idler?
idler's founders, as listed on its YC page: Ivan Chub (Founder/CEO), Nalu Concepcion (Founder), Tony Goss (Founder).
Where is idler based?
idler lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.