Paper Star

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About Paper Star

YC company profile

Long-horizon agents for teams

For companies that want to 10x, Echo agents learn the work, do it end to end, and scale it

  • YC batch: Spring 2026
  • Founded: 2026
  • Team size: 3
  • Location: San Francisco
  • Country: US
  • Status: Active
  • Industry: B2B
  • Stage: Early
  • Tags: AI
  • YC partner: Pete Koomen

Founders

Jynnie Tang — Founder/CEO

Making Napkin Math, the personalized AI food journal that helps people achieve their health goals
Previously: Retool, One More Multiverse, MIT

LinkedIn

Manuel Castro — Founder

Building the next generation of agents

Previously: Verkada, Sonos, Healthcare Tech

LinkedIn · X

Claire Nord — Founder/CTO

CTO @ Paper Star

Prev. Apple OS security, Samsara, MIT 6-3 '19

LinkedIn · X

Source: Y Combinator · Retrieved 2026-11-02. Company information is self-reported on YC.