Y Combinator companies
The Y Combinator portfolio as the radar sees it: synced daily, classified into clusters, checked for life and movement. 6,197 companies.
clusterVertical AI agents 898Consumer 821B2B SaaS 787Fintech 633Developer tools 515Healthcare and bio 477Commerce and marketplaces 433Agent infrastructure 350Robotics and physical world 314Data for AI 192Security and compliance 189Horizontal AI assistants 152AI infra and compute 151Climate and energy 123Defense and space 85Other 44
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Duranium Reshoring critical metal production | Climate and energycritical minerals production | Y CombinatorS25 | Active | checked 2026-08-23 |
| NODI Energy Distributed energy infrastructure unlocking grid power to data centers | Climate and energydistributed energy infrastructure for data centers | Y CombinatorX25 | Active | checked 2026-08-23 |
| AstroAI The world’s first AI energy developer | Climate and energyAI-powered renewable energy development | Y CombinatorW25 | Active, new domain | 2026-08-23 |
| Maritime Fusion Fusion reactors for ships | Climate and energyfusion reactors for maritime and off-grid | Y CombinatorW25 | Active | checked 2026-08-23 |