| iSoft Design | Victoria |
| iSOFT Software Technologies Pty Ltd | |
| iSolutions International Pty Ltd | Queensland |
| iSolutions Technology | Western Australia |
| iSonic Pty Ltd | |
| Isoton | South Australia |
| IT Alliance Australia | |
| IT Call out | Western Australia |
| IT Company Pty Ltd | New South Wales |
| IT Easy | New South Wales |
| IT Focused Solutions | New South Wales |
| IT House Pty Ltd | Western Australia |
| IT Leaders Group | Queensland |
| IT Magnet Pty Ltd | New South Wales |
| IT Masters Pty Ltd | Queensland |
| IT Next Generation | New South Wales |
| IT Service Hobart | |
| IT Support Brisbane | Queensland |
| IT Supported | |
| IT Switch | Victoria |
| IT System Solutions Pty Ltd | Victoria |
| IT Ventures Pty Ltd | |
| IT Vision Australia | Western Australia |
| IT West Holdings Pty Ltd | Western Australia |
| iTag | New South Wales |
| Itag Media | |
| ITC Co Pty Ltd | |
| ITCC | Victoria |
| ITIC Sydney | New South Wales |
| ITL Biomedical | Australian Capital Territory |
| iTnews | New South Wales |
| Itomic Web App Design Development | Victoria |
| iTrobes Technologies | |
| ITSwitch Pty Ltd | Victoria |
| ITTECH Pty Ltd | New South Wales |
| ITtelligent Consulting Services | Victoria |
| ITUC Today | Western Australia |
| iTWire | |
| iTWire | |
| ITworx Consulting Pty Ltd | |
| Iugo Pty Ltd | South Australia |
| iVvy | |
| Jaaims Australia Pty Ltd | New South Wales |
| Jaarvis | |
| JABA | |
| Jack Marlow | Victoria |
| Jacob Gates Design & Media | |
| Jadu Ltd | Australian Capital Territory |
| Jaffa Designs | Queensland |
| Jago Digital | |