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 |
|---|---|---|---|---|
| Quickchat AIAI Conversation Design platform to build Al Assistants tailored to your… | Agent infrastructureAI assistant platform and orchestration | Y CombinatorS18 | Active | checked 2026-08-23 |
| WithinAI Company Brain for people and agents to work in harmony. | Agent infrastructurework process mapping and orchestration | Y CombinatorS18 | Active | checked 2026-08-23 |
| Tilt (f.k.a. Delphia)AI GitHub for Investment Methodology | Agent infrastructureVerified methodology layer for investment agents | Y CombinatorW18 | Active | checked 2026-08-23 |