| Teagasc | |
| Teamwork.com Ltd | Cork City Council |
| Tech Life Ireland | Dublin City Council |
| Tech Skills | |
| Tech Week | Dublin City Council |
| TechCentral | Dublin City Council |
| TechIreland | Dublin City Council |
| TechMeetup.Space | |
| Technological University Dublin | |
| Technology Gateway Network | |
| Techstore | Kildare County Council |
| Tenego Partnering | Cork City Council |
| Terenure Enterprise Centre | |
| TerminusDB | |
| Tesco Mobile | Dublin City Council |
| Testimonial Robot | |
| The DataWorks | |
| The Digital Department | |
| The Digital Health Society | |
| The Digital Hub | Dublin City Council |
| The Good Software Company | Fingal County Council |
| The Website Shop | |
| TheDesignPool | Dún Laoghaire-Rathdown County Council |
| Thenet.ie | Dublin City Council |
| Thesaurus Software Ltd | Meath County Council |
| ThinScale Technology Ltd | |
| Threadable | |
| Thriftify | |
| Tidy Web Development | Dublin City Council |
| TimePoint | South Dublin County Council |
| Timewise Systems | |
| Tines | |
| Tito | Dublin City Council |
| TLD Registry Ltd | |
| Together Digital | |
| Tom Smyth & Associates | |
| Top Digital Agency Ltd | |
| Topmail Ltd | Dublin City Council |
| TopSecTechnology | Dublin City Council |
| Torc Web Design | Westmeath County Council |
| Total Digital | |
| Touchapps | |
| Townapps | |
| Tr3Dent | Galway City Council |
| TransferMate | |
| Tranzaura | |
| TRC Solutions Ireland | Dún Laoghaire-Rathdown County Council |
| Treetop Studio | |
| Tribal City Interactive Ltd | |
| Trigger Communication | Galway City Council |