| 1000021469 | B-OPEN SOLUTIONS SRL | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000042431 | BTRY AG | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000026569 | Cadami GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000041164 | CAIUS E.E. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000034828 | Capra Robotics ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000045233 | Capsule Corporation srl | IT-Italy | Company | Yes | Incubatee | ESA BIC Turin | |
| 1000039064 | Cavicore UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000043849 | CDXi Solutions P.C. | GR-Greece | Company | Yes | Incubatee | ESA BIC Greece | |
| 1000029367 | CEDRION | ES-Spain | Company | Yes | Alumnus | ESA BIC Madrid Region | |
| 1000042846 | Celemation B.V. | NL-Netherlands | Company | Yes | Incubatee | ESA BIC Noordwijk | |
| 1000043407 | Celesse Ltd. | GB-United Kingdom | Company | Yes | Incubatee | ESA BIC UK | |
| 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 | |
| 1000042757 | Celtonn Limited | IE-Ireland | Company | Yes | Incubatee | ESA BIC Ireland | |
| 1000034045 | Centrale Valutativa | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000032787 | CHEXS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000034163 | Circuits Integrated Hellas IKE | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000039016 | ClearSky Imagery ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000030383 | ClearSpace SA | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000035121 | CLOUD SIGNALS | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |