| 4Cabling Pty Ltd | New South Wales |
| 4D Global | Victoria |
| 4Dmedical | |
| 4i Digital | |
| 4Impact Group | Queensland |
| 4IT Support Pty Ltd | New South Wales |
| 4mation | New South Wales |
| 4TBIZ Digital Agency | South Australia |
| 4th Party Pty Ltd | Victoria |
| 4ward Computer Services | Queensland |
| 52nd Solution | |
| 532M | |
| 5B Holdings Pty Ltd | |
| 5RiOS | |
| 5Tales | South Australia |
| 65 Bits | Western Australia |
| 6clicks | Victoria |
| 6YS Pty Ltd | Queensland |
| 7 Pillars | |
| 80/20 Digital | Victoria |
| 88 Green Ventures | Victoria |
| 8common Ltd | Australian Capital Territory |
| 92 Computing | New South Wales |
| 99designs Pty Ltd | Victoria |
| 9T5 Pty Ltd | |
| @Work International | Victoria |
| A Drive Computers | Queensland |
| A to B Solutions | New South Wales |
| A.P. Web Solutions | Victoria |
| A7Designs | South Australia |
| AAA Cartridge Recharge (Australia) | Queensland |
| AAA Headsets | Western Australia |
| AAM Pty Ltd | Queensland |
| AANDCP IT Solutions | Tasmania |
| Aarchi Infotech Solutions | |
| AARNet Pty Ltd | Australian Capital Territory |
| Aaron Knight | New South Wales |
| Aaron Turner-Jones | Queensland |
| Aawsom Websites | New South Wales |
| AB Web Developers | Western Australia |
| Abacus RentIT Pty Ltd | New South Wales |
| Abacus Systems | Victoria |
| Abbey Communications | Queensland |
| Abby Health Technology Pty Ltd | |
| ABC Analytics | Victoria |
| Able Video & Multimedia Pty Ltd | Queensland |
| About Website Design | New South Wales |
| Above & Beyond Web Design Pty Ltd | |
| Above.com Pty Ltd | Victoria |
| Absolute IT | |