| Think Talent Pty Ltd | Victoria |
| ThinkingRock | New South Wales |
| Thinkswap Pty Ltd | |
| Thomas Marsden Advertising Pty Ltd | New South Wales |
| ThoughtWare Australia Pty Ltd | Queensland |
| Threat Protect Asutralia Ltd | Western Australia |
| Three AM Web + IT | South Australia |
| Thrive Digital | |
| Throttle Media | New South Wales |
| TI Systems | Western Australia |
| Tiberius Data Mining | Victoria |
| Tic Technologies | New South Wales |
| Tick Tock Design | Victoria |
| Tickit Systems Pty Ltd | New South Wales |
| Tidal Ventures | New South Wales |
| TidyHQ | Victoria |
| Tier-3 Pty Ltd | New South Wales |
| Tiliter | New South Wales |
| Till Payments | New South Wales |
| Time & Access Systems | New South Wales |
| Timesheets MTS Software | South Australia |
| Timetabling Solutions | Victoria |
| Tindo Solar | South Australia |
| TMD Online | Queensland |
| TMQ International Pty Ltd | Queensland |
| TN3 Productions | Western Australia |
| Toba Data Recovery | Victoria |
| Toby Creative | |
| Todo.vu | Queensland |
| Tomizone Ltd | New South Wales |
| TOMORROW Super | New South Wales |
| Tonberry Digital | New South Wales |
| Top Rank Designs | Western Australia |
| Top Rankings | Victoria |
| Top SEO Pages | Western Australia |
| Top SEO Sydney Pty Ltd | New South Wales |
| Top Spot SEO | |
| Top Tradie Websites | Queensland |
| Topfive Designs | Victoria |
| Topologi | New South Wales |
| Toro Cloud Pty Ltd | New South Wales |
| Torque IT Pty Ltd | Western Australia |
| Torrens University | New South Wales |
| Torus Games | Victoria |
| Total Metrics | Victoria |
| Totalwebsites Pty Ltd | New South Wales |
| Touch Panel Control Ltd | Queensland |
| Tower Hill Automation | Victoria |
| Townsville Computer Recyclers | Queensland |
| Townsville Linux Users Group | Queensland |