YCF25· AI· Devtoolshillclimb
Training Data for Recursive Self-Improvement
ActiveChecked 16h ago
Founders
- Jun ParkFounder/CEO
Same space
Competitors
Closest in what they build, same category.
Cashew LabsX25Recursive self improving harnesses and modelsShared: recursive, improvement, selfActive
MonteS25Continual Learning for AgentsShared: reinforcement learningActive
Zettascale ComputingS24Chips for frontier AIShared: recursive, improvement, selfActive
Ooak DataS26We turn company data into training dataShared: reinforcement learningActive
AviroX25Environments for Long Horizon WorkShared: reinforcement learningActive
Adjacent
Overlapping tags, a different niche.
idlerS25Hill-climb any benchmark, for any model, in any domain.Shared: reinforcement learningActive
CueBenchS26RL post-training for science reasoning and performance engineeringShared: reinforcement learningActive
ThetaX25Specialized AI for Every JobShared: reinforcement learningActive
EdotEnvS26Quant Neolab building self-improving agents from quant dataShared: reinforcement learningActive
HUDW25Platform for building RL environments and evalsShared: reinforcement learningActive
Also from F25 in AI
Batchmates in Fall 2025.
Cortex AIF25Large-scale real-world robot & human data for embodied AIActive
SylvianF25Specialized AI Agents.Inactive
AbsurdF25The Creative OS for AI videoActive
AirCapsF25The AI copilot for in-person conversations.Active
AlderF25AI employees for finance, starting with accounts receivable.Active
Aleph LabF25AI language buddy in the games kids loveActive
Outside YC
Similar companies on companies.fru.dev.
About hillclimb
We work with frontier AI labs to help train their agents to become AI research scientists
San Francisco, CA, USA
hillclimb: questions
Which YC batch was hillclimb in?
hillclimb was in Y Combinator's Fall 2025 batch (F25).
Is hillclimb still active?
Y Combinator lists hillclimb as active.
Who founded hillclimb?
hillclimb's founders, as listed on its YC page: Jun Park (Founder/CEO).
Where is hillclimb based?
hillclimb 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.