| 1000039625 | Blackpin GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden-Württemberg | |
| 1000016283 | BLACKSHORE B.V. | NL-Netherlands | Company | Yes | Alumnus | ESA BIC Noordwijk | |
| 1000027748 | Blackwave GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000050073 | Blue Neptune International Ltd | GB-United Kingdom | Company | Yes | Incubatee | ESA BIC UK | |
| 1000037258 | boltzplatz - numerical plasma dynamics GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden-Württemberg | |
| 1000021469 | B-OPEN SOLUTIONS SRL | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000042431 | BTRY AG | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000040372 | BWI SAS | FR-France | Company | Yes | Alumnus | ESA BIC Sud France | |
| 1000026569 | Cadami GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000034828 | Capra Robotics ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000045233 | Capsule Corporation srl | IT-Italy | Company | Yes | Alumnus | ESA BIC Turin | |
| 1000047624 | Catchwise AS | NO-Norway | Company | Yes | Alumnus | ESA BIC Norway | |
| 1000039064 | Cavicore UG (haftungsbeschränkt) | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000043849 | CDXi Solutions P.C. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000042846 | Celemation B.V. | NL-Netherlands | Company | Yes | Alumnus | ESA BIC Noordwijk | |
| 1000043407 | Celesse Ltd. | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000048603 | Celestia Energy s.r.o. | CZ-Czech Republic | Company | Yes | Incubatee | ESA BIC Czech Republic | |
| 1000035335 | Celestial Space Technologies GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000042757 | Celtonn Limited | IE-Ireland | Company | Yes | Alumnus | ESA BIC Ireland | |
| 1000050125 | Cense Analytics Oy | FI-Finland | Company | Yes | Incubatee | ESA BIC Finland | |