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Manuel Castro
FounderFounder at Napkin Math
San Francisco, California, United States
FoundedNapkin Math · YC
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About
Manuel Castro previously worked at Sonos, a healthcare technology company, and Verkada before founding Napkin Math, an AI-powered food journal application.
Founder at Napkin MathYC X26
Intro paths
Manuel went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Pete Koomen, General Partner at Y Combinator — the partner who ran Napkin Math's batch and knows the company first-hand. YC profile ↗
In turn, Manuel can intro founders to Napkin Math's investors below.
Napkin Math's investors · 1
Co-founders at Napkin Math
Frequently asked questions
- Who is Manuel Castro?
- Manuel Castro previously worked at Sonos, a healthcare technology company, and Verkada before founding Napkin Math, an AI-powered food journal application.
- Where does Manuel Castro work?
- Manuel Castro is Founder of Napkin Math.
- What companies did Manuel Castro found?
- Manuel Castro founded Napkin Math.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
Massachusetts Institute of Technology mafia1,487
Also came through, then founded or led a company.
Verkada mafia25
Also came through, then founded or led a company.
Artera mafia3
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Napkin Math's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights