| 1000040131 | INSIGHIO P.C. | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000039299 | Insolight SA | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000044654 | InSpacePropulsion Technologies GmbH | DE-Germany | Company | Yes | Alumnus | ESA BIC Baden-Württemberg | |
| 1000029389 | Intelligence on Wheels (IoW) GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000045638 | Intellmaps | CZ-Czech Republic | Company | No | Alumnus | ESA BIC Czech Republic | |
| 1000042371 | Inverto Earth AG | CH-Switzerland | Company | Yes | Alumnus | ESA BIC Switzerland | |
| 1000033601 | INVOLI | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000042887 | Involve Space S.r.l. | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000042504 | iQrypto | BE-Belgium | Company | No | Alumnus | ESA BIC Belgium | |
| 1000035998 | IRsweep AG | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000041801 | IRUBIS GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000030449 | Isar Aerospace SE | DE-Germany | Company | No | Alumnus | ESA BIC Bavaria | |
| 1000044629 | IVAQ Technologies S.L. | ES-Spain | Company | No | Alumnus | ESA BIC Madrid Region | |
| 1000046511 | JenAscent GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000048758 | Journey Protector (UK) Limited | GB-United Kingdom | Company | No | Alumnus | ESA BIC UK | |
| 1000030393 | Joysys GmbH | AT-Austria | Company | No | Alumnus | ESA BIC Austria | |
| 1000042854 | Jsio | PT-Portugal | Company | Yes | Alumnus | ESA BIC Portugal | |
| 1000036431 | JupiterDynamic Atividades de Engenharia e Tecnicas Afins LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000047399 | KAMAHU | FR-France | Company | Yes | Alumnus | ESA BIC Nord France | |
| 1000023616 | KAPPAZETA LTD | EE-Estonia | Company | Yes | Alumnus | ESA BIC Estonia | |