{"slug":"osmosis","name":"Osmosis","website":"https://osmosis.ai","tagline":"Forward-deployed reinforcement learning for AI agents","description":"Osmosis (YC W25) is a post-training platform that fine-tunes models with reinforcement learning so companies' agents beat foundation models on specific tasks in performance, cost, and latency. Founded by Kasey Zhang and ex-TikTok tech lead Andy Lyu.","domains":["machine-learning"],"locations":["San Francisco"],"founders":[{"name":"Kasey Zhang","xHandle":null},{"name":"Andy Lyu","xHandle":null}],"teamSize":"1-10","funding":"Seed, $7M (CRV, Audacious Ventures, YC)","raising":null,"founded":2024,"notable":"Angel investors include Paul Graham and Guillermo Rauch","entityType":"Pure-play commercial","canonicalUrl":"https://envindex.com/startup/osmosis","research":null,"sources":[],"capabilityCatalog":{"startupSlug":"osmosis","reviewedAt":"2026-08-16","status":"cataloged","items":[{"name":"Forward-Deployed RL Platform","kind":"Product capability","summary":"Task-specific model training, deployment, and continuous improvement.","access":["Commercial"],"sourceUrl":"https://osmosis.ai/platform","sourceLabel":"Platform","verificationStatus":"company-reported","lastVerified":"2026-08-16"}]},"artifacts":[],"caveat":"Legacy profile awaiting claim-level source migration"}