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.
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| TensorPool Vercel For GPUs | AI infra and computeGPU orchestration and training platform | Y CombinatorW25 | Acquired | checked 2026-08-23 |
| ZeroEntropyAI Artificial Specialized Intelligence | AI infra and computeTask-specific model optimization | Y CombinatorW25 | Acquired | checked 2026-08-23 |
| OpenPipeAI Turn expensive prompts into cheap fine-tuned models | AI infra and computeModel fine-tuning and optimization infrastructure | Y CombinatorS23 | Acquired | checked 2026-08-23 |
| Arroyo Cloud-native stream processing | AI infra and computeserverless stream processing platform | Y CombinatorW23 | Acquired | checked 2026-08-23 |
| PlayAIAI Our mission is to make Voice AI accessible and useful to all. | AI infra and computeVoice AI model serving and cloning | Y CombinatorW23 | Acquired | checked 2026-08-17 |
| Hydra Serverless Analytics on Postgres | AI infra and computeServerless analytics database for Postgres | Y CombinatorW22 | Acquired | checked 2026-08-17 |
| KeyDB The only database you'll ever need | AI infra and computeIn-memory database with flash persistence | Y CombinatorS20 | Acquired | checked 2026-08-23 |
| ReplicateAI Run machine learning models in the cloud | AI infra and computeModel serving and inference API | Y CombinatorW20 | Acquired | checked 2026-08-23 |
| Rain Neuromorphics We build artificial intelligence processors inspired by the brain. | AI infra and computeNeuromorphic AI processor hardware | Y CombinatorS18 | Acquired | checked 2026-08-17 |
| LyrebirdAI Our tech speaks for itself. | AI infra and computeSpeech synthesis API for developers | Y CombinatorS17 | Acquired | 2026-08-23 |
| Peer5 P2P delivery network that enables high quality video streaming | AI infra and computeP2P video delivery network | Y CombinatorW17 | Acquired | checked 2026-08-17 |
| Terark Fastest Storage Engine with the Best Compression, we enables direct… | AI infra and computeDatabase storage engine and compression | Y CombinatorW17 | Acquired | checked 2026-08-17 |
| CrowdAIAI CrowdAI is the world's leading no-code platform for vision AI | AI infra and computeVision AI platform and model training | Y CombinatorS16 | Acquired | checked 2026-08-17 |
| NeoWizeAI NeoWize created a new type of machine learning algorithm and uses it… | AI infra and computemachine learning algorithms and data generation | Y CombinatorS16 | Acquired | checked 2026-08-17 |
| Paperspace Paperspace is a cloud platform for building and scaling AI… | AI infra and computeGPU cloud platform for AI | Y CombinatorW15 | Acquired | checked 2026-08-23 |
| Raven TechAI Our vision is to build the next generation of iOS or Android, to… | AI infra and computeNext-generation OS with AI | Y CombinatorW15 | Acquired | checked 2026-08-17 |
| SigOpt SigOpt is an Optimization-as-a-Service platform that seamlessly tunes… | AI infra and computeML hyperparameter optimization platform | Y CombinatorW15 | Acquired | 2026-08-23 |
| Citus Data Real-time. Big data. PostgreSQL | AI infra and computePostgreSQL scaling and distributed database | Y CombinatorS11 | Acquired | checked 2026-08-23 |
| Compose We make it easy to run databases. PostgreSQL, Redis, MongoDB,… | AI infra and computemanaged database hosting platform | Y CombinatorS11 | Acquired | checked 2026-08-17 |
| Zencoder Video Encoding API, Open source video player (video.js) | AI infra and computevideo encoding API infrastructure | Y CombinatorW10 | Acquired | 2026-08-23 |
| RethinkDB The open source database for the realtime web. | AI infra and computerealtime database engine | Y CombinatorS09 | Acquired | checked 2026-08-23 |
| Clustrix | AI infra and computescale-out relational database | Y CombinatorW06 | Acquired | 2026-08-23 |