YCX25· AI· DataCartpole
Building reinforcement learning environments
ActiveChecked 24h ago
Founders
- Mateo PerezFounder/CEO
Same space
Competitors
Closest in what they build, same category.
SureformX25Real-world data and RL environments for frontier AIShared: data labelingActive
AviroX25Environments for Long Horizon WorkShared: reinforcement learningActive
OsmosisW25Reinforcement Learning (RL) for AI AgentsShared: reinforcement learningActive
- SymplexS19Applied Reinforcement Learning Research LaboratoryShared: reinforcement, learningAcquired
Perit.AIF26Expert-led data and RL platform for AI labsShared: data labelingActive
Adjacent
Overlapping tags, a different niche.
Sepal AIS24Data Development for Advanced AIShared: reinforcement learning, data labelingAcquired
CoArenaS26The biggest crowdsourced benchmark for Computer-UseShared: reinforcement learning, data labelingActive
MarkovS26Expert computer-use data for frontier AI labsShared: reinforcement learning, data labelingActive
Agentin AIW25AI Agents that automate enterprise software processesShared: reinforcement learningActive
TrainLoopW25Reasoning Fine-TuningShared: reinforcement learningActive
Also from X25 in AI
Batchmates in Spring 2025.
Outside YC
Similar companies on companies.fru.dev.
About Cartpole
We're creating reinforcement learning environments for training frontier models.
San Francisco, CA, USA
Cartpole: questions
Which YC batch was Cartpole in?
Cartpole was in Y Combinator's Spring 2025 batch (X25).
Is Cartpole still active?
Y Combinator lists Cartpole as active.
Who founded Cartpole?
Cartpole's founders, as listed on its YC page: Mateo Perez (Founder/CEO).
Where is Cartpole based?
Cartpole 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.