| Tribulant | North West |
| Triloq Technologies | Western Cape |
| Trinity Designs | Western Cape |
| Triple J Design | |
| Triple S Solutions | Gauteng |
| Trispen Technologies | Gauteng |
| Tristar | Western Cape |
| Truclean | Gauteng |
| truID (Pty) Ltd | Gauteng |
| Trunuty | Gauteng |
| Trusoft Software | Western Cape |
| TruTeq Wireless (Pty) Ltd | Gauteng |
| TRYQIT | |
| Tryqit (Pty) Ltd | |
| TS School | Gauteng |
| TSA Online | KwaZulu-Natal |
| Tshimologong | Gauteng |
| Tshwane South TVET College | |
| Tshwane University of Technology | Gauteng |
| Tshwane University of Technology - Faculty of Information and Communication Technology | Gauteng |
| TshwaneDJe | Western Cape |
| TSI | Gauteng |
| TSIBA Education | Western Cape |
| TuksNovation | Gauteng |
| TurboCAD | Gauteng |
| Turfspot (Pty) Ltd | Western Cape |
| TuxSoft | Western Cape |
| TWHosting | Western Cape |
| Two Fishes Design | |
| Tyrmida | Gauteng |
| UAASA | Gauteng |
| uAfrica.com | Gauteng |
| Ubuntu Online | Gauteng |
| UCT Graduate School of Business | Western Cape |
| UCT GSB Solution Space | Western Cape |
| Ukheshe Technologies | Gauteng |
| Ukuvuma Solutions | Gauteng |
| Ultimate Linux Solutions | Gauteng |
| Ultitec Electronics | KwaZulu-Natal |
| Ultra Quick Host | Mpumalanga |
| Umgungunglovu TVET College | |
| Unibase Solutions | Gauteng |
| Uniclox | Gauteng |
| Unicom Computer Services | Gauteng |
| Unified Data | KwaZulu-Natal |
| Unilynx | Western Cape |
| Unipos Point of Sale | Free State |
| UniSource Software Services | Gauteng |
| Uniterm Direct | Gauteng |
| Universal Information Technologies | Gauteng |