| T&G Elektro | Akershus |
| Targovax ASA | |
| TCP Data | Rogaland |
| Tech Data Norge AS | |
| Techmakers | |
| Techstep ASA | |
| Tek.no | Oslo |
| Teknisk Ukeblad Media AS | Oslo |
| Teknologihuset | |
| Telemarksforsking | |
| Telenor AS | Akershus |
| Telenor Group | Akershus |
| Televenture Management AS | |
| Telia Norge AS | |
| Telio | Hordaland |
| Tero Marine | Hordaland |
| The Arctic AS | |
| The Quartz Corporation | Nordland |
| TheFactory | |
| Thelper AS | |
| Thor Medical | |
| Tibber | |
| Tight | |
| Tillit Forsikring AS | |
| Timely AS | |
| Tings | |
| Tiqri AS | Oslo |
| TISIP | |
| To The Point Webdesign | Akershus |
| Tordivel AS | Oslo |
| Total Data | Sogn og Fjordane |
| TotalHosting.biz | Hedmark |
| ToTheGame AS | Oslo |
| Toyota Norge AS | |
| Treteknisk | |
| TRK Group AS | |
| Trond Lyngbø | |
| Trondheim Tech Port | |
| Trondheim Unix User Group | Trøndelag |
| TSAT AS | |
| Two AS | |
| UBIQ Aerospace | |
| UiT Norges arktiske universitet | Troms |
| Ultimovacs ASA | |
| Unfold | |
| Uni Micro | Hordaland |
| Unifractal | |
| Uninett AS | |
| Unit - Direktoratet for IKT og fellestjenester i høyere utdanning og forskning | Trøndelag |
| United Works | |