For companies that want to 10x, Echo agents learn the work, do it end to end, and scale it. The company was founded by Jynnie Tang; Manuel Castro; Claire Nord.
It is part of YC Spring 2026. It is based in San Francisco, CA, USA.
AI Agents
Paper Star
Long-horizon agents for teams
Paper Star facts
| Fact | Detail |
|---|---|
| Batch / Program | YC Spring 2026 |
| Headquarters | San Francisco, CA, USA |
| Industry | B2B |
| Category | AI Agent Startups |
| Founders | Jynnie Tang, Manuel Castro, Claire Nord |
| Website | echoecho.ai |
Listed in the AIToolGuide 2026 startups database (513 AI companies). Listings are free; no paid offers. Data as recorded from Y Combinator batch listings, November 2026.