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Osmosis

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Reinforcement Learning (RL) for AI Agents

Winter 2025Founded 20246 peopleSan Francisco, CA, USA
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โ†ป Pivot / rename signal

This company has previously operated under โ€œGulpโ€. A rename frequently marks a pivot in positioning or product โ€” useful raw material for variant ideas.

About

Osmosis is a post-training platform that helps companies fine-tune language models using reinforcement learning. We work with fast-growing AI companies to train task/domain-specific models that beat foundation models on performance, cost, and latency. Our platform handles compute orchestration, reward modeling, and training run observability as a CLI-based product usable by developers and agents.

Founders ยท 2

Kasey Zhang
Kasey ZhangFounder

Currently: osmosis.ai Previously: gaming founder, VC

Andy Lyu
Andy LyuFounder

Defining how real time systems should be built. Previously worked on data architecture and ecosystem at TikTok recommendations as the 5th and youngest US hire

B2BArtificial IntelligenceMachine LearningReinforcement LearningInfrastructure

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