| 1000015579 | CLOUDEO AG | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000041379 | COBOT Dynamics gmbh | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000041863 | Coher Sense UG | DE-Germany | Company | Yes | Alumnus | ESA BIC Northern Germany | |
| 1000046770 | ColdXray Oy | FI-Finland | Company | Yes | Incubatee | ESA BIC Finland | |
| 1000038069 | CompPair Technologies Ltd | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000035883 | ConstellR GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden Württemberg | |
| 1000035240 | CORAmaps GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000039489 | Correntics GmbH | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000037164 | Cosmic S.r.l. | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000046153 | cosy.green GmbH | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000040580 | CropOM-Hungary Kft. | HU-Hungary | Company | Yes | Alumnus | ESA BIC Hungary | |
| 1000037108 | Crover Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000018471 | CRYSTALSPACE OÜ | EE-Estonia | Company | Yes | Alumnus | ESA BIC Estonia | |
| 1000044717 | Curf | BE-Belgium | Company | Yes | Alumnus | ESA BIC Belgium | |
| 1000031188 | CYSEC | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000045725 | Daisytuner UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000041477 | Danish Graphene ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 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 | |
| 1000028518 | DATelite | HU-Hungary | Company | Yes | Alumnus | ESA BIC Hungary | |