Cohorts of 2021
Companies whose accelerator cohort started in 2021. 1,685 companies.
clusterB2B SaaS 183Consumer 168Fintech 155Healthcare and bio 126Commerce and marketplaces 111Developer tools 68Climate and energy 66Vertical AI agents 66Robotics and physical world 59Security and compliance 34Other 28Data for AI 24Horizontal AI assistants 17Defense and space 15Agent infrastructure 13AI infra and compute 7
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Arengu Build frictionless signup flows in minutes | Developer toolssignup flow builder for developers | Y CombinatorS21 | Acquired | checked 2026-08-17 |
| Satsuma Reliable blockchain indexing & querying for web3 engineering teams. | Developer toolsblockchain data indexing API | Y CombinatorS21 | Acquired | checked 2026-08-17 |
| Warrant Authorization and access control as a service. | Developer toolsauthorization infrastructure platform | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| Dyte Real-time audio & video SDKs, ready to launch 🚀 | Developer toolsvideo streaming SDKs | Y CombinatorW21 | Acquired | checked 2026-08-23 |
| Emerge Tools Supercharge your mobile apps | Developer toolsMobile app performance and monitoring | Y CombinatorW21 | Acquired | checked 2026-08-23 |
| FunctionUp (FanPlay) A skill-tech platform that runs placement bootcamps | Developer toolsTechnical talent training and placement | Y CombinatorW21 | Acquired | checked 2026-08-23 |
| Pyroscope Open source continuous profiling software to debug performance issues | Developer toolsContinuous profiling and debugging | Y CombinatorW21 | Acquired | 2026-08-23 |
| Uiflow No-code platform for enterprise software companies | Developer toolsNo-code application development platform | Y CombinatorW21 | Acquired | checked 2026-08-23 |