| Name | Type | Country |
|---|---|---|
| TB-Solutions Advanced Technologies | Enterprise | Spain |
| Tecdoa | Enterprise | Spain |
| Technological University Dublin | Educational organization | Ireland |
| Tecnalia | Enterprise | Spain |
| TECNUN | University | Spain |
| Telefonica | Enterprise | Spain |
| Telemática y Lógica Racional para la Empresa | Enterprise | Spain |
| Televes | Enterprise | Spain |
| Tempos21 | Enterprise | Spain |
| Thaumat | Enterprise | Spain |