Y Combinator companies
The Y Combinator portfolio as the radar sees it: synced daily, classified into clusters, checked for life and movement. 6,198 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 153AI infra and compute 152Climate and energy 123Defense and space 85Other 44
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| SemantixAI AI for medical billing | Vertical AI agentsAI medical billing automation | Y CombinatorS17 | Inactive | checked 2026-08-23 |
| Bicycle AIAI Bicycle AI provides customer support as a service. We work on top of… | Vertical AI agentsAI customer support service | Y CombinatorW17 | Inactive | checked 2026-08-24 |
| Smart AltoAI Easiest way to set appointments with real estate leads | Vertical AI agentsAI appointment booking for real estate | Y CombinatorW17 | Inactive | checked 2026-08-23 |