Napkin Math
YC X26 · Active · AI nutrition coach in your pocket
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 FitiaShared: nutrition tracking, calorie, foodActiveAI | AI | Active | YCS21 |
 SnapCalorieShared: nutrition tracking, calorieActiveAI | AI | Active | YCS21 |
 rex.fitShared: nutrition trackingActiveAI | AI | Active | YC +1W23 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
| Hanah OneShared: consumer healthNot statedOther | Other | Not stated | 500 Global2025 |
 Function of BeautyShared: size fitsActiveOther | Other | Active | YCW16 |
 GynisusShared: health outcomeNot statedAI, Data | AI, Data | Not stated | Plug and Play |
Also from X26 in AI
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|---|---|---|
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 AkkariAutonomous Customer OperationsActiveAI | AI | Active |
 AllowanceThe spend control layer for AI agentsActiveAI | AI | Active |
 AmborasAI Native ShopifyActiveAI, Data, Devtools | AI, Data, Devtools | Active |
Founders
- Jynnie TangFounder/CEO
- Manuel CastroFounder
- Claire NordFounder/CTO
About Napkin Math
Napkin Math is the personalized AI food journal that people love to use. We gamify nutrition tracking so people are 2x more likely to stick with us than other trackers. Claire, Manuel, and I (best friends for 10 years from MIT) are obsessed with how we can make nutrition fun, and turn fun into health outcomes. === Existing consumer health apps focus on scaling a one-size-fits-all solution: calorie deficits. But they don’t answer the questions you actually have. Food is deeply personal, and so is Napkin Math: Get the fuel you need for marathon training, while understanding you eat catered office lunches five days a week. Discover what’s triggering your stomach irritation, without sacrificing your weekly dinner with friends. Napkin Math tailors a plan for not only your specific health goal, but also your life.
- YC batch
- X26 · Spring 2026
- Status, per YC
- Active
- Category
- AI
- Team size
- 3
- Location
- San Francisco, CA, USA
- Founded
- 2026
- Checked
- 34m ago
Napkin Math: questions
Which YC batch was Napkin Math in?
Napkin Math was in Y Combinator's Spring 2026 batch (X26).
Is Napkin Math still active?
Y Combinator lists Napkin Math as active.
Who founded Napkin Math?
Napkin Math's founders, as listed on its YC page: Jynnie Tang (Founder/CEO), Manuel Castro (Founder), Claire Nord (Founder/CTO).
Where is Napkin Math based?
Napkin Math lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.