| 1000033512 | CargoSteps GmbH & Co. KG | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000039064 | Cavicore UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000035335 | Celestial Space Technologies GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000040241 | Cellgrid | DE-Germany | Company | Yes | Alumnus | ESA BIC North Rhine-Westphalia | |
| 1000042438 | CELUS GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000039469 | Cevotec GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000015579 | CLOUDEO AG | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000042381 | CM 1 GmbH | DE-Germany | Company | No | Incubatee | ESA BIC Bavaria | |
| 1000041863 | Coher Sense UG | DE-Germany | Company | Yes | Alumnus | ESA BIC Northern Germany | |
| 1000035883 | ConstellR GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden Württemberg | |
| 1000035240 | CORAmaps GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000046153 | cosy.green GmbH | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000042115 | CSTREAM UG | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000045725 | Daisytuner UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000042417 | Data Machine Intelligence Solutions GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000031516 | Datarella GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000033120 | Dcubed GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000029530 | Deep Blue Globe UG (Halftungsbeschrankt) | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000043785 | Deep LS GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000042174 | DeltaOrbit GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |