Founder Directory
Built by Keitoto
Founders7
Known for these resultsRole57%Role is parsed from founder titles in yc.db. Known for 57% 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-company43%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 43% of these rows have at least one match.School14%School is matched from bios, case-sensitive for acronyms. 14% of these rows have at least one match.
- Naman Bansal@namanbansal0611Founder · ManiculeX26B2B · San Francisco
- Shreyans Jain@shreyansjFounder/CEO · ManiculeX26B2B · San Francisco
- Sherwood Callaway@shcallawayFounder/CEO · SazabiX26B2B · San Francisco
- Abhi Aiyer@abhiaiyerFounder/CTO · MastraW25B2B · San Francisco
- Sam Bhagwat@calcsamFounder/CEO · MastraW25B2B · San Francisco
- Shane Thomas@smthomas3Founder · MastraW25B2B · San Francisco
- Jack MastrangeloFounder · CobblestoneW23Real Estate and Construction · New York
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Naman BansalManiculeFounderSpring 2026B2BSan Francisco, United States5https://x.com/namanbansal0611Shreyans JainManiculeFounder/CEOSpring 2026B2BSan Francisco, United States5https://x.com/shreyansjSherwood CallawaySazabi2× YCFounder/CEOSpring 2026B2BSan Francisco, United States10https://x.com/shcallawayAbhi AiyerMastraFounder/CTOWinter 2025B2BSan Francisco, United States30https://x.com/abhiaiyerSam BhagwatMastraFounder/CEOWinter 2025B2BSan Francisco, United States30https://x.com/calcsamShane ThomasMastraFounderWinter 2025B2BSan Francisco, United States30https://x.com/smthomas3Jack MastrangeloCobblestoneFounderWinter 2023Real Estate and ConstructionNew York, United States3—
Showing 1–7 of 7 founders
Sam Bhagwat
Founder/CEO·Mastra
PRIMARY INFO
RoleFounder/CEO
Team size30
BatchWinter 2025
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Founder/CEO of Mastra. Spent last ~8yrs as cofounder of Gatsby.js, an open-source React website framework, scaled to $5M ARR, sold to Netlify. Eng <20 at Zenefits (W13) and Plangrid (W12). Spent two years knocking doors. Stanford '11.
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
Exit mentioned in bio
COMPANY CONTEXT
MastraThe Javascript framework for building AI agents, from the Gatsby devs
