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 |
|---|---|---|---|---|
| Abatable Carbon markets platform and solutions | Climate and energyCarbon offset procurement platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| BLUUMBIO We make bacteria and plants that clean up pollution. | Climate and energybiotech pollution remediation | Y CombinatorS21 | Active | checked 2026-08-23 |
| Carbonfact Decarbonizing the fashion industry | Climate and energyfashion supply chain carbon tracking | Y CombinatorS21 | Active | checked 2026-08-23 |
| Coulomb AIAI Battery Observability Platform for Electric Vehicles | Climate and energyAI battery management for EVs | Y CombinatorS21 | Active | checked 2026-08-23 |
| Enerjazz Making electric vehicle batteries affordable | Climate and energyEV battery swapping infrastructure | Y CombinatorS21 | Active | checked 2026-08-24 |
| HeyCharge Low-cost, high-scale EV charging platform for apartments (and more). | Climate and energyEV charging infrastructure for multifamily | Y CombinatorS21 | Active | checked 2026-08-23 |
| Phykos Growing seaweed to stabilize the climate. | Climate and energyseaweed-based carbon capture | Y CombinatorS21 | Site unreachable | checked 2026-08-17 |
| Planet A Foods Building the next generation food ingredient champion. | Climate and energysustainable food ingredients via fermentation | Y CombinatorS21 | Active | checked 2026-08-23 |
| Waterplan Water risk mitigation for industrial sites | Climate and energyWater risk assessment for industry | Y CombinatorS21 | Active | checked 2026-08-23 |
| Enode Energy Orchestration Platform | Climate and energyhome energy coordination and grid orchestration platform | Y CombinatorW21 | Active | checked 2026-08-23 |
| Gridware Protecting the grid today, preparing the grid for tomorrow | Climate and energyGrid monitoring and outage detection hardware | Y CombinatorW21 | Active | checked 2026-08-23 |
| Remora Carbon capture for vehicles | Climate and energycarbon capture from vehicle exhaust | Y CombinatorW21 | Active | checked 2026-08-23 |