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 |
|---|---|---|---|---|
| EARTH AIAI Predictive Explorer and Driller for Critical Metal Deposits | Climate and energyAI exploration for critical minerals | Y CombinatorS19 | Active | checked 2026-08-23 |
| Gaiascope SaaS that helps renewables & energy storage operate more profitably | Climate and energyrenewable energy grid forecasting | Y CombinatorS19 | Acquired | checked 2026-08-23 |
| Kitekraft Building flying wind turbines. | Climate and energyairborne wind energy systems | Y CombinatorS19 | Site unreachable | checked 2026-08-23 |
| Wren Wren is a monthly subscription to offset your carbon footprint. | Climate and energyPersonal carbon offsetting subscription | Y CombinatorS19 | Active | checked 2026-08-23 |
| AmpUp We make EV charging as simple and reliable as LED lights | Climate and energyEV charging infrastructure | Y CombinatorW19 | Active | checked 2026-08-23 |
| Green Energy Exchange We deliver affordable renewable energy direct to customers and are… | Climate and energyrenewable energy retail marketplace | Y CombinatorW19 | Inactive | 2026-08-23 |
| Intelline Intelline makes the world's most efficient fuel agnostic engines for… | Climate and energyfuel-agnostic industrial power generation | Y CombinatorW19 | Active | checked 2026-08-24 |
| Maple Materials We turn CO2 into battery-grade graphite and oxygen. | Climate and energyCarbon-negative graphite production | Y CombinatorW19 | Inactive | checked 2026-08-17 |
| Pachama Restoring nature to solve climate change. | Climate and energycarbon verification and forest marketplace | Y CombinatorW19 | Acquired | 2026-08-23 |
| Prometheus We use solar and wind power to make zero net carbon electrofuels | Climate and energysynthetic electrofuels from renewable energy | Y CombinatorW19 | Active, new domain | 2026-08-23 |
| Traverse TechnologiesAI AI driven professional engineering firm | Climate and energyAI-powered renewable energy site prospecting | Y CombinatorW19 | Inactive | checked 2026-08-23 |
| Valo Cutting edge hydrofoil systems for boatbuilders | Climate and energyMaritime efficiency technology | Y CombinatorW19 | Active | 2026-08-23 |