Founder Directory
Built by Keitoto
Founders5
Known for these resultsRole80%Role is parsed from founder titles in yc.db. Known for 80% 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-company100%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 100% of these rows have at least one match.School40%School is matched from bios, case-sensitive for acronyms. 40% of these rows have at least one match.
- Raghav MehrishFounder/CTO · Arctic HealthX26Healthcare · New York
- Sam Bhagwat@calcsamFounder/CEO · MastraW25B2B · San Francisco
- Kuberan Marimuthu@ikuberanFounder · CypherW22Fintech · San Francisco
- Prasanna S@myprasannaFounder/CTO · RipplingW17B2B · San Francisco
- Laks Srini@laks_sriniFounder/CTO · ZenefitsW13B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Raghav MehrishArctic HealthFounder/CTOSpring 2026HealthcareNew York, United States4—Sam BhagwatMastraFounder/CEOWinter 2025B2BSan Francisco, United States30https://x.com/calcsamKuberan MarimuthuCypherFounderWinter 2022FintechSan Francisco, United States12https://x.com/ikuberanPrasanna SRipplingFounder/CTOWinter 2017B2BSan Francisco, United States2500https://x.com/myprasannaLaks SriniZenefitsFounder/CTOWinter 2013B2BSan Francisco, United States500https://x.com/laks_srini
Showing 1–5 of 5 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
