| 1000044353 | Theo Moura Unipessoal LDA | PT-Portugal | Company | No | Alumnus | ESA BIC Portugal | |
| 1000048007 | ThiaX | DK-Denmark | Company | No | Alumnus | ESA BIC Denmark | |
| 1000033243 | Think Biosolution | IE-Ireland | Company | No | Alumnus | ESA BIC Ireland | |
| 1000042133 | Thistle Rocketry Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000043984 | THOTHX - SERVIÇOS DE RADAR ESPACIAL, LDA | PT-Portugal | Company | Yes | Alumnus | ESA BIC Portugal | |
| 1000051060 | TILESKOPIO EP P.C. | GR-Greece | Company | Yes | Incubatee | ESA BIC Greece | |
| 1000037276 | Timing Solutions Ltd | IE-Ireland | Company | No | Alumnus | ESA BIC Ireland | |
| 1000028837 | Tisalabs LTD | IE-Ireland | Company | No | Alumnus | ESA BIC Ireland | |
| 1000032660 | TITAN4 srl | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000031622 | TIWARI Scientific Instruments GmbH | DE-Germany | Company | No | Alumnus | ESA BIC Hessen | |
| 1000044649 | TLG Innovations | BE-Belgium | Company | No | Alumnus | ESA BIC Belgium | |
| 1000045111 | TOM Robotics GmbH | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000047619 | TOMPAERO | FR-France | Company | No | Incubatee | ESA BIC Nord France | |
| 1000042594 | Toqua | BE-Belgium | Company | Yes | Alumnus | ESA BIC Belgium | |
| 1000044657 | Tordenskjold ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000039538 | TOSA swisstech | CH-Switzerland | Company | No | Alumnus | ESA BIC Switzerland | |
| 1000051264 | TRACK Technologies UG (haftungsbeschränkt) | DE-Germany | Company | No | Incubatee | ESA BIC Hessen | |
| 1000045168 | TrackDeep OÜ | EE-Estonia | Company | No | Alumnus | ESA BIC Estonia | |
| 1000040540 | TRACKSCO2 SATELITES SL | ES-Spain | Company | No | Alumnus | ESA BIC Barcelona | |
| 1000050540 | TrackTech GmbH | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |