Andrew Gritsevskiy

Andrew Gritsevskiy is a co-founder of RunRL, a Y Combinator-backed startup (S25 batch) that provides Reinforcement Learning as a Service (RLaaS) to improve Large Language Models (LLMs) and AI agents. His work at RunRL is centered on making advanced reinforcement learning accessible for optimizing AI models, enabling custom behaviors and specialized solutions in areas like chemistry, web agents, code generation, and voice agents. ycombinator+2

He previously served as a Director at Cavendish Labs, a nonprofit research organization dedicated to AI safety and pandemic prevention. His involvement suggests a commitment to addressing critical, long-term societal challenges, particularly through research into AI alignment and public health initiatives. Cavendish Labs also provided a community-focused research environment in Cavendish, Vermont. cavendishlabs+1

Andrew has a strong background in reinforcement learning research, having pursued a PhD in the field before leaving it to co-found RunRL. This indicates a deep theoretical and practical understanding of RL and a proactive approach to applying cutting-edge research to real-world AI challenges. ycombinator+1

Andrew Gritsevskiy maintains a personal website where he describes himself as a 'researcher, adventurer' and lists his current location as London, England (as of May 2025). He also engages with his audience through merchandise related to RunRL, hosted on 'rlmerch.com'. andrew+1