| 1000032787 | CHEXS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000049953 | Chirp Light AG | CH-Switzerland | Company | Yes | Incubatee | ESA BIC Switzerland | |
| 1000034163 | Circuits Integrated Hellas S.A. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000052439 | Civil Defence Services sp. z.o.o | PL-Poland | Company | Yes | Incubatee | ESA BIC Poland | |
| 1000048249 | Clarity AI | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000039016 | ClearSky Imagery ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000030383 | ClearSpace SA | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000046431 | CleverHive Space Sp. z o.o. | PL-Poland | Company | Yes | Incubatee | ESA BIC Poland | |
| 1000047544 | ClimateScope s.r.o. | CZ-Czech Republic | Company | Yes | Incubatee | ESA BIC Czech Republic | |
| 1000035121 | CLOUD SIGNALS | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000041379 | COBOT Dynamics gmbh | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000046770 | ColdXray Oy | FI-Finland | Company | Yes | Alumnus | 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 | |
| 1000038987 | CORAC Engineering s.r.o. | CZ-Czech Republic | Company | Yes | Alumnus | ESA BIC Czech Republic | |
| 1000035240 | CORAmaps GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000039329 | Corintis SA | 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 | Alumnus | ESA BIC Hessen | |
| 1000040580 | CropOM-Hungary Kft. | HU-Hungary | Company | Yes | Alumnus | ESA BIC Hungary | |