Cohorts of 2019
Companies whose accelerator cohort started in 2019. 1,218 companies.
clusterConsumer 150B2B SaaS 98Fintech 97Commerce and marketplaces 81Healthcare and bio 71Robotics and physical world 50Climate and energy 43Developer tools 42Vertical AI agents 32Security and compliance 26Data for AI 24Other 18Defense and space 13Horizontal AI assistants 13AI infra and compute 9Agent infrastructure 8
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Bun Bun is an incredibly fast all-in-one JavaScript toolkit | Developer toolsJavaScript runtime and toolkit | Y CombinatorS19 | Acquired | checked 2026-08-23 |
| Data Mechanics Spark-on-Kubernetes Data Engineering Platform | Developer toolsSpark-on-Kubernetes data engineering platform | Y CombinatorS19 | Acquired | checked 2026-08-24 |
| FeaturePeek Supercharged deployment previews for all. | Developer toolsdeployment preview and feedback tooling | Y CombinatorS19 | Acquired | checked 2026-08-23 |
| Fuzzbuzz Fuzzing as a Service | Developer toolsFuzzing and security testing platform | Y CombinatorW19 | Acquired | - |
| Memfault First IoT reliability platform for debugging, monitoring, OTA updates | Developer toolsIoT device debugging and OTA updates | Y CombinatorW19 | Acquired | checked 2026-08-23 |
| Preflight No-code Web Apps testing for everyone | Developer toolsNo-code web testing platform | Y CombinatorW19 | Acquired | checked 2026-08-24 |
| Visly Build React components visually | Developer toolsVisual component builder for React | Y CombinatorW19 | Acquired | 2026-08-23 |