| Tridan , S.L. | |
| Triditive | Asturias |
| Trimedia e-Consulting, S.L. | Madrid |
| Trinfo, S.L. | Huesca |
| Trioteca | Barcelona |
| Triple O Games | Santa Cruz de Tenerife |
| Triporate | Madrid |
| Triporate | |
| Triskell Software | Madrid |
| trueIT Systems, S.L. | Madrid |
| Trupp Publicidad | Biscay |
| Trusteam Capital, S.L. | Madrid |
| Trypton Software | Asturias |
| Tu Fábrica de Eventos | Madrid |
| Tu Posicionamiento Web | Madrid |
| Tucan Information Technologies, S.L. | Barcelona |
| Tucan IT, S.L. | Barcelona |
| tugesto | Valencia |
| TUNALKAN eBusiness, S.L. | Madrid |
| TuringDream, S.L. | |
| Turning Tables | Granada |
| Tus Documentos Online | Ciudad Real |
| TusIdeas | |
| Tutellus | |
| TV Alper | Madrid |
| Twentic | Barcelona |
| Twinco Capital | Madrid |
| Twinco Capital M&O Spain, S.L. | Madrid |
| TWYSI | |
| Tycsa PSC | Cantabria |
| Typeform | Barcelona |
| Tyris Software | Valencia |
| Tyris Tx | Valencia |
| U-tad | |
| UAV Navigation | Madrid |
| Ubik, S.L. | Madrid |
| Ubilibet by Nominalia | Barcelona |
| Ubiqum Code Academy | Barcelona |
| Ubiquotechs | Madrid |
| UBIS Servicios Informáticos | Biscay |
| Ubuntu-es | Castellón |
| uDA Real Estate Data, S.L. | Madrid |
| Uelz | Valencia |
| UEMC Business School | |
| Ufinet | Madrid |
| Ufounders | |
| Ukabi, S.L. | Gipuzkoa |
| UKIO, Inc. | Barcelona |
| Ultimobyte España, S.L. | Valencia |
| Ultreia Comunicaciones, S.L. | Pontevedra |