Cohorts of 2021
Companies whose accelerator cohort started in 2021. 1,685 companies.
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| HEO Robotics We visually monitor space objects for governments and defense | Defense and spaceSatellite imagery and space monitoring | Y CombinatorS21 | Active | 2026-08-23 |
| Inversion Space Turning space into a transportation layer for Earth | Defense and spacespace infrastructure for transportation | Y CombinatorS21 | Active | checked 2026-08-23 |
| Kalam Labs Near Space Flying Machines | Defense and spacehigh-altitude UAVs for reconnaissance | Y CombinatorS21 | Active | checked 2026-08-23 |
| Odys Aviation Vertical takeoff and landing aircraft for major airlines | Defense and spaceeVTOL aircraft manufacturing | Y CombinatorS21 | Active | checked 2026-08-23 |
| Onebrief Onebrief makes military headquarters run seamlessly | Defense and spacemilitary planning software | Y CombinatorS21 | Active | checked 2026-08-23 |
| TransAstra Corporation Orbital logistics: Unleashing space industry, from Earth to asteroids | Defense and spaceorbital logistics and propulsion | Y CombinatorS21 | Active | checked 2026-08-23 |
| Turion Space Moving Things Around in Space, Imaging Space Objects When We're Not | Defense and spacespace domain awareness and orbital services | Y CombinatorS21 | Active | checked 2026-08-23 |
| Alba Orbital We make satellites to image everywhere on Earth, every 15 minutes | Defense and spaceEarth observation satellite constellation | Y CombinatorW21 | Active | checked 2026-08-23 |
| Albedo Full-stack VLEO satellite missions | Defense and spaceVLEO satellite infrastructure and operations | Y CombinatorW21 | Active | checked 2026-08-23 |
| Care Weather The highest-accuracy global weather data from low-cost flat satellites | Defense and spaceEarth observation satellites | Y CombinatorW21 | Active | checked 2026-08-23 |
| Stoke Space Seamless mobility to, through, and from space. It starts with 100%… | Defense and spacereusable rocket launch vehicle | Y CombinatorW21 | Active | checked 2026-08-23 |
| Dimeq Innovative Maritime Safety Solutions | Dimeq | Defense and spacemaritime safety monitoring | TechstarsTS 2021 | Active | checked 2026-08-23 |
| Hyperkelp HyperKelp | Defense and spaceSpace infrastructure and monitoring | TechstarsTS 2021 | Active | checked 2026-08-23 |
| Pierce Aerospace Pierce Aerospace | Enhance Airspace Safety—Learn More | Defense and spacedrone identification and airspace safety | TechstarsTS 2021 | Active | checked 2026-08-23 |
| Scout Scout Space | Defense and spaceSpace intelligence and monitoring | TechstarsTS 2021 | Active | checked 2026-08-23 |