Founder Directory
Built by Keitoto
Founders6
Known for these resultsRole50%Role is parsed from founder titles in yc.db. Known for 50% 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-company17%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 17% of these rows have at least one match.School100%School is matched from bios, case-sensitive for acronyms. 100% of these rows have at least one match.
- Rohan VijFounder/CTO · ReasonBlocksX26B2B · San Francisco
- Shrey Gupta@shreygupsFounder/CTO · OliveW25B2B · San Francisco
- Tom BishopFounder · Feanix BiotechnologiesS23Industrials · Asheville
- Chris CardeFounder · HeyChargeS21Industrials · Munich
- David Mills@davidamillsFounder · MatrubialsS21Healthcare · Davis
- Jose M. Mejia OnetoFounder/CEO · ShasqiW15Healthcare · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Rohan VijReasonBlocksFounder/CTOSpring 2026B2BSan Francisco, United States2—Shrey GuptaOliveFounder/CTOWinter 2025B2BSan Francisco, United States2https://x.com/shreygupsTom BishopFeanix BiotechnologiesFounderSummer 2023IndustrialsAsheville, United States5—Chris CardeHeyChargeFounderSummer 2021IndustrialsMunich, Germany17—David MillsMatrubialsFounderSummer 2021HealthcareDavis, United States4https://x.com/davidamillsJose M. Mejia OnetoShasqiFounder/CEOWinter 2015HealthcareSan Francisco, United States28—
Showing 1–6 of 6 founders
Sajeev Magesh
Founder/CEO·ReasonBlocks
PRIMARY INFO
RoleFounder/CEO
Team size2
BatchSpring 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Formerly at Stanford CS. Published in Nature Sustainable Agriculture (ML × agriculture). UN Best Paper. USAMO qualifier. 11 years building with co-founder Rohan. Currently making AI agents smarter and more reliable @ ReasonBlocks
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
ReasonBlocksThe runtime layer that makes AI agents cheaper and more reliable
Co-foundersRohan Vij
