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-company100%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 100% of these rows have at least one match.School33%School is matched from bios, case-sensitive for acronyms. 33% of these rows have at least one match.
- Jynnie TangFounder/CEO · Napkin MathX26Consumer · San Francisco
- Yujian Yao@yyjhaoFounder/CEO · FlootS25B2B · San Francisco
- William HuFounder · RiskAngleS24B2B · San Francisco
- Aash JainFounder/CTO · SampleW24Healthcare · San Francisco
- Apurva Shrivastava@apurvas96Founder · AvocaW23B2B · New York
- Mark Florkowski@markrflorkowskiFounder · T3 ChatW22Consumer · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Jynnie TangNapkin MathFounder/CEOSpring 2026ConsumerSan Francisco, United States3—Yujian YaoFlootFounder/CEOSummer 2025B2BSan Francisco, United States4https://x.com/yyjhaoWilliam HuRiskAngleFounderSummer 2024B2BSan Francisco, United States2—Aash JainSampleFounder/CTOWinter 2024HealthcareSan Francisco, United States5—Apurva ShrivastavaAvocaFounderWinter 2023B2BNew York, United States85https://x.com/apurvas96Mark FlorkowskiT3 ChatFounderWinter 2022ConsumerSan Francisco, United States2https://x.com/markrflorkowski
Showing 1–6 of 6 founders
Manuel Castro
Founder·Napkin Math
PRIMARY INFO
RoleFounder· not in title
Team size3
BatchSpring 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Napkin Math is the hyper-personalized AI food journal that helps people achieve their health goals. Previously: Sonos, Healthcare Tech, Verkada
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
No notable employer or school mentioned in the bio.
Credentialsnone mentioned
Disciplinenot detectedKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Napkin MathAI nutrition coach in your pocket
IndustryConsumer
Websitenapkinmath.club
Team size3
LocationSan Francisco, United States
BatchSpring 2026
