RunRL YC Application
RunRL went through Y Combinator in the Spring 2025 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.
- YC batch
- Spring 2025
- Industry
- B2BInfrastructure
- Team size
- 2
- Status
- Active
- Launched
- 2025
Founders
Andrew GritsevskiyFounder
What RunRL does
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.
RunRL's YC application, reconstructed
Y Combinator application
RunRL, Spring 2025 batch. The real form questions, answered from public data.
- Founders2
- Company7
- Progress7
- Idea4
- Equity3
- Curious2
- Batch Preference1
Company
RunRL
Reinforcement learning as a service
We built a platform that takes existing models, user-defined prompts, and reward signals, then automatically improves those models through reinforcement learning. Instead of users manually tweaking prompts or buying expensive observability tools, they use RunRL to get their AI agents or LLMs to improve on specific tasks with measurable reward increases.
We live in San Francisco and RunRL is based here. After YC, the company will remain in San Francisco.
San Francisco is where we are now and where most AI infrastructure innovation happens. Staying here connects us with talent and customers in the AI and startup ecosystem without relocation disruption.
21 more answers in the full application
Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.
Frequently Asked Questions
Is this the real RunRL YC application?
No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from RunRL's public data (launch notes, founder backgrounds, product description). It shows how a company like RunRL would present itself to YC, not the text they submitted.
What YC batch was RunRL in?
RunRL was part of the Y Combinator Spring 2025 batch.
Who founded RunRL?
RunRL was founded by Andrew Gritsevskiy.
What does RunRL do?
Reinforcement learning as a service
How do I read the full reconstructed application?
Create a free Round Funded account. The full 26-answer version of RunRL's application, and every other YC batch, is in YC Insights.
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