| 1000045286 | Tethys | FR-France | Company | Yes | Alumnus | ESA BIC Sud France | |
| 1000041321 | Thaliana Space sp. z o.o. | PL-Poland | Company | Yes | Alumnus | ESA BIC Poland | |
| 1000038318 | The Exploration Company | DE-Germany | Company | Yes | Alumnus | ESA BIC Bavaria | |
| 1000043084 | The Plasma Rocket Company | DE-Germany | Company | Yes | Alumnus | ESA BIC Hessen | |
| 1000044798 | Theia Labs KG | AT-Austria | Company | Yes | Incubatee | ESA BIC Austria | |
| 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 | |
| 1000032660 | TITAN4 srl | IT-Italy | Company | Yes | Alumnus | ESA BIC Lazio | |
| 1000045111 | TOM Robotics GmbH | AT-Austria | Company | Yes | Alumnus | ESA BIC Austria | |
| 1000042594 | Toqua | BE-Belgium | Company | Yes | Alumnus | ESA BIC Belgium | |
| 1000044657 | Tordenskjold ApS | DK-Denmark | Company | Yes | Alumnus | ESA BIC Denmark | |
| 1000050540 | TrackTech GmbH | DE-Germany | Company | Yes | Incubatee | ESA BIC Hessen | |
| 1000050002 | Treeconomy Ltd | GB-United Kingdom | Company | Yes | Alumnus | ESA BIC UK | |
| 1000046721 | Trimsignal | GR-Greece | Company | Yes | Alumnus | ESA BIC Greece | |
| 1000047525 | TUMI ROBOTICS SPACE | LU-Luxembourg | Company | Yes | Incubatee | ESRIC Start-up Support Programme | |
| 1000049078 | Twinverse | FI-Finland | Company | Yes | Incubatee | ESA BIC Finland | |
| 1000041027 | Tycho Space Technologies AS | NO-Norway | Company | Yes | Alumnus | ESA BIC Norway | |
| 1000043212 | UAB Biordico | LT-Lithuania | Company | Yes | Incubatee | ESA BIC Lithuania | |
| 1000040692 | UAB Delta Biosciences | LT-Lithuania | Company | Yes | Alumnus | ESA BIC Lithuania | |