About
Manuel Castro previously worked at Sonos, a healthcare technology company, and Verkada before founding Napkin Math, an AI-powered food journal application.
Manuel Castro @manny4c
coding x gaming https://t.co/4irkPfGA0T
Aug 2, 2026 · ♥ 5
Manuel Castro @manny4c
TIL https://t.co/0tOq3ZatAC
Jul 29, 2026
Manuel Castro @manny4c
No AI-written posts on the timeline is incredible. I’ve honestly loved the decrease of “viral” content that is reposted, too. x is starting to feel great again https://t.co/lSwwQ9iDiN
Jul 28, 2026 · ♥ 3
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
