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 |
|---|---|---|---|---|
| AutomorphicAI Infuse knowledge into language models with just 10 samples | AI infra and computeEfficient LLM fine-tuning infrastructure | Y CombinatorS23 | Active | checked 2026-08-23 |
| ParadeDB Unify application data, vectors, and full-text search in one Postgres | AI infra and computeVector search and retrieval infrastructure | Y CombinatorS23 | Active | checked 2026-08-23 |
| Shadeform The GPU Cloud Marketplace | AI infra and computeGPU cloud marketplace and provisioning | Y CombinatorS23 | Active, new domain | 2026-08-23 |
| Trainy Infrastructure for managing GPU clusters for training/serving. | AI infra and computeGPU cluster scheduling and orchestration | Y CombinatorS23 | Active | checked 2026-08-23 |
| ChimaAI Building infrastructure tools to help large companies customize their… | AI infra and computeModel customization and fine-tuning infrastructure | Y CombinatorW23 | Active | checked 2026-08-23 |
| DecohereAI Real-time generative AI | AI infra and computeReal-time generative AI infrastructure | Y CombinatorW23 | Active, new domain | 2026-08-23 |
| Dream3DAI We build tools to help humanity predict the future. | AI infra and compute3D generative models and simulation | Y CombinatorW23 | Active | checked 2026-08-23 |
| FlowerAI Train AI on distributed data | AI infra and computeFederated learning infrastructure | Y CombinatorW23 | Active | checked 2026-08-23 |
| KV CashAI KV Cash, a blockchain where contracts can finally think | AI infra and computeAI-powered blockchain infrastructure | Y CombinatorW23 | Active | checked 2026-08-23 |
| LinumAI type text, dream video | AI infra and computegenerative video models | Y CombinatorW23 | Active | checked 2026-08-23 |
| Middleware AI-based full stack observability platform | AI infra and computeAI-powered observability and monitoring | Y CombinatorW23 | Active | checked 2026-08-23 |
| PoplarML Deploy Machine Learning Models with One Command | AI infra and computeML model serving and deployment | Y CombinatorW23 | Site unreachable | checked 2026-08-17 |
| Texel.aiAI Run AI pipelines 10x faster | AI infra and computeHardware-accelerated inference optimization | Y CombinatorW23 | Active | checked 2026-08-23 |