| TECS telecommunication & e-commerce solutions GmbH | |
| TEDxVienna | |
| Tele Haase Steuergeräte Ges.m.b.H. | Vienna |
| TeleDoc Holding GmbH | |
| TelefonABC.at | Salzburg |
| Telematica Internet Service Provider GmbH | |
| Teleteam GmbH | Salzburg |
| Tellmore Telefoniedienstleistungen GmbH | Vienna |
| Texterify | |
| TGW Logistics Group GmbH | Upper Austria |
| The Antibody Lab | |
| The Base | |
| The Blue Minds Company | |
| The Collaboratory | |
| The Female Factor | |
| The Human Factor GmbH | |
| The Nest CoWorking Space | |
| Theobroma Systems Design und Consulting GmbH | |
| Therefore Corporation GmbH | Lower Austria |
| thesocialist.rocks | Salzburg |
| TheVentury GmbH | Vienna |
| ThioMatrix Forschungs- Beratungs GmbH | |
| THQ Nordic GmbH | |
| Tiani Spirit GmbH | Vienna |
| Tiedemann GmbH | |
| TIGAS-Erdgas Tirol GmbH | |
| Timebite | |
| TIMEWARP IT Consulting GmbH | Vienna |
| TIP Technik und Informatik Partner GmbH | Vorarlberg |
| TiPOS GmbH | Vienna |
| Tirol Kliniken GmbH | |
| Tirolspace | Tyrol |
| TMT Türkott Multitechnik GmbH | Vienna |
| tom4mac IT-Consulting KG | Salzburg |
| toolani GmbH | Vienna |
| ToolSense | |
| Top Versicherungs-Vermittler Service GmbH | |
| Top-jobs-europe.at | Vienna |
| TOWA GmbH | Vienna |
| TP-media | Vienna |
| Tractive | Upper Austria |
| Traktionssysteme Austria GmbH | |
| Trality | |
| transForm | Vienna |
| Transpaygo | |
| Transporter | |
| treAngeli | Lower Austria |
| Trending Topics | Vienna |
| Trenkwalder Group AG | |
| TREVISION Groß.Bild.Technik GmbH | Burgenland |