| 5Tales | South Australia |
| 65 Bits | Western Australia |
| 6clicks | Victoria |
| 6YS Pty Ltd | Queensland |
| 7 Pillars | |
| 80/20 Digital | Victoria |
| 86 400 Ltd | New South Wales |
| 88 Green Ventures | Victoria |
| 8common Ltd | Australian Capital Territory |
| 92 Computing | New South Wales |
| 99designs Pty Ltd | Victoria |
| @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 |
| Abacus RentIT Pty Ltd | New South Wales |
| Abacus Systems | Victoria |
| Abbey Communications | Queensland |
| ABC Analytics | Victoria |
| Able Video & Multimedia Pty Ltd | Queensland |
| About Website Design | New South Wales |
| Above.com Pty Ltd | Victoria |
| Absolutely Group Pty Ltd | Victoria |
| ABTC Group | New South Wales |
| Abtrac | New South Wales |
| Abweb | Western Australia |
| Abyss Solutions | New South Wales |
| AC&E Telecommunications | New South Wales |
| ACAC Innovation | Queensland |
| Acacia Business Systems | New South Wales |
| Academies Australasia Polytechnic | |
| Academy IT | South Australia |
| Acce Communications | Victoria |
| Acceleration | Victoria |
| Accentuate | Queensland |
| Access Data Systems | New South Wales |
| Access Internet | Western Australia |
| Acclaim Accounting Software Pty Ltd | Queensland |
| Accounting Addons | South Australia |
| Ace Internet Services Pty Ltd | New South Wales |