| The Next Web B.V. | North Holland |
| The Selection Lab | North Holland |
| The Shopbuilders | Overijssel |
| The Simple eXperience | North Holland |
| The Social Hub | |
| The sound of data | South Holland |
| The Talent Institute | North Holland |
| The Things Network | |
| The TIM Company | |
| The Yellow Web | North Holland |
| Theiner ICT | North Brabant |
| Theta-Comm automatisering | Limburg |
| TheyDo B.V. | |
| Thikwise | Gelderland |
| Think Ahead | |
| Thirdwave | South Holland |
| Thirona | |
| this.play | North Holland |
| Thorizon | North Holland |
| Threatspan | South Holland |
| Three Ships Enterprises B.V. | South Holland |
| Thuisin computers | |
| THX Network | |
| Tiamet Technologies B.V. | |
| Tibo Energy | |
| Tiemex Logistic Services B.V. | Gelderland |
| TiePie | Friesland |
| Ties.DB | South Holland |
| TIG | North Holland |
| TIIN Capital | |
| Tik & Klik Internetdiensten | Drenthe |
| Tilaa B.V. | Utrecht |
| Tilburg University | North Brabant |
| Tiledmedia | South Holland |
| TILER | South Holland |
| Timco Automatisering B.V. | North Holland |
| TimeTell | South Holland |
| Timewriter | Friesland |
| TIOBE Software B.V. | North Brabant |
| TIQ B.V. | North Holland |
| Tiscom Hosting B.V. | Gelderland |
| Tizio | North Holland |
| TJIP The Platform Engineer | South Holland |
| Tm-Pro | North Holland |
| TMC Group B.V. | |
| TMDi | Gelderland |
| TNX | South Holland |
| To Be Found | South Holland |
| To-Increase | Utrecht |
| ToBeOnline | Groningen |