Jynnie Tang
Founder/CEOMaking Napkin Math, the personalized AI food journal that helps people achieve their health goals Previously: Retool, One More Multiverse, MIT
Founder profile As recorded 2026-09-15
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Business
Paper Star
Overview
For companies that want to 10x, Echo agents learn the work, do it end to end, and scale it
Company description As recorded 2026-11-08
Founders & team
Previously Paper Star, Napkin Math
Company history As recorded 2026-11-08
Manuel Castro
FounderNapkin Math is the hyper-personalized AI food journal that helps people achieve their health goals. Previously: Sonos, Healthcare Tech, Verkada
Founder profile As recorded 2026-09-15
Claire Nord
Founder/CTOBuilding Napkin Math, hyper-personalized AI food journal https://napkinmath.club Prev. Apple OS security, Samsara, MIT 6-3 '19
Founder profile As recorded 2026-09-15
3team members reported
Source-reported As recorded 2026-09-15
Founded 2026 · Source
News & product activity
Cohort membership
Spring 2026Spring 2026
Original evidence ↗Sources & observations
Profile depthverified profile
Website observationwebsite reachable
Last website check2026-11-11
Location · source statedSan Francisco, CA, USA
Pricing evidenceNo pricing page confirmed
Maturity: Not assessed · 3 of 6 areas documented
Source-based assessment · automated evidence rules
The captured homepage does not clearly identify the listed business.
Maturity is an evidence-based assessment, not a success rating. It may understate the current stage where evidence is limited. Coverage records documented areas, not a complete or independently audited company history.
- Product overviewSource description Checked 2026-11-11
- Product visualsNot documented
- Founders & originsTeam information
- Business model & pricingNot documented
- Funding & ownershipNot documented
- Dated milestonesDated source activity: 2026 Q2 (quarter only)
independent websitesource corroborationreachable websitedescriptive evidencesourced peoplesourced founding year