RunRL
YC X25 · Active · Reinforcement learning as a service
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 VmaxShared: reinforcement learningNot statedDevtools | Devtools | Not stated | SPC2025 |
 Preference ModelsShared: reinforcement learningNot statedDevtools | Devtools | Not stated | SPC2025 |
 OsmosisShared: reinforcement learning, reward, modelActiveAI, Devtools | AI, Devtools | Active | YCW25 |
 CartpoleShared: reinforcement learning, modelActiveAI, Data | AI, Data | Active | YCX25 |
| SymplexShared: reinforcement learningAcquiredAI, Data | AI, Data | Acquired | YCS19 |
 Prime Intellectnot in a program hereShared: reinforcement learning, agentElsewhereOther | Other | Elsewhere |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 AgileRLShared: reinforcement learningNot statedOther | Other | Not stated | EF2023 |
 Phantasma LabsShared: reinforcement learningNot statedOther | Other | Not stated | EF2018 |
 Unsloth AIShared: reinforcement learning, model, llmsActiveAI, Devtools | AI, Devtools | Active | YCS24 |
 TrainLoopShared: reinforcement learningActiveAI, Devtools | AI, Devtools | Active | YCW25 |
 Zibra LabsShared: reinforcement learning, agent, infrastructureActiveAI, Devtools | AI, Devtools | Active | YCX26 |
Also from X25 in AI
All of X25
Founders
- Andrew GritsevskiyFounder
About RunRL
RunRL improves LLMs and AI agents with reinforcement learning. Do you have a model that needs to get better at a certain task? Are you tired of messing around with prompts? Do you spend a lot of money on observability, and wish that all this data could let your model self-improve? Well, head on over to RunRL.com, and see what we have to offer! If you give us a model, a prompt, and a reward, we’ll make your model’s reward go up.
- YC batch
- X25 · Spring 2025
- Status, per YC
- Active
- Category
- AI, Developer tools
- Team size
- 2
- Location
- San Francisco, CA, USA
- Founded
- 2025
- Checked
- 31m ago
RunRL: questions
Which YC batch was RunRL in?
RunRL was in Y Combinator's Spring 2025 batch (X25).
Is RunRL still active?
Y Combinator lists RunRL as active.
Who founded RunRL?
RunRL's founders, as listed on its YC page: Andrew Gritsevskiy (Founder).
Where is RunRL based?
RunRL lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.