Founder Directory
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Founders2
Known for these resultsRole100%Role is parsed from founder titles in yc.db. Known for 100% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio100%Bio coverage: 100% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company50%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 50% of these rows have at least one match.School0%School is matched from bios, case-sensitive for acronyms. 0% of these rows have at least one match.
- Andy Lyu@viewerislandFounder/CTO · OsmosisW25B2B · San Francisco
- Kasey Zhang@_WEEXIAOFounder/CEO · OsmosisW25B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Andy LyuOsmosisFounder/CTOWinter 2025B2BSan Francisco, United States6https://x.com/viewerislandKasey ZhangOsmosisFounder/CEOWinter 2025B2BSan Francisco, United States6https://x.com/_WEEXIAO
Showing 1–2 of 2 founders
Andy Lyu
Founder/CTO·Osmosis
PRIMARY INFO
RoleFounder/CTO
Team size6
BatchWinter 2025
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
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
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
Disciplinenot detectedKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Osmosis
Reinforcement Learning (RL) for AI Agents
Co-foundersKasey Zhang@_WEEXIAO
