| AKS Digital | South Australia |
| Aktiv Digital | Victoria |
| Albury Local Internet | New South Wales |
| Albury Web Design | New South Wales |
| Alectro Pty Ltd | New South Wales |
| Aleis Pty Ltd | Queensland |
| Aleph IT Pty Ltd | |
| Alexa Digital | Victoria |
| Algomint | Queensland |
| Alien Intelligence | |
| Alink247 | Victoria |
| Aliquot Solutions | |
| Alkye Services Pty Ltd | |
| All I.T. Solutions Pty Ltd | Australian Capital Territory |
| All IT Services | New South Wales |
| All IT Services | |
| All Marketing | |
| Alliance Business Technologies | Queensland |
| Alliance Networks Support | Victoria |
| Alliance SI | New South Wales |
| Alliance Software | Victoria |
| Allied Data Systems Pty Ltd | New South Wales |
| Alloy Computer Products Australia Pty Ltd | Victoria |
| Allpos | Western Australia |
| Alltraders Pty Ltd | South Australia |
| Allume Energy Pty Ltd | |
| Alpha Digital | Queensland |
| Alpha Finance | |
| Alpha Fintech (Australia) Pty Ltd | Victoria |
| Alpha Station | Victoria |
| Alphacrucis University College Ltd | |
| Alphastation Group Pty Ltd | Victoria |
| Alphasys Pty Ltd | New South Wales |
| AlphaWallet Pty Ltd | New South Wales |
| Alterity Therapeutics | Victoria |
| Alternate Studios | Victoria |
| AlterNET Software | New South Wales |
| Altima Interactive | Victoria |
| Altis Consulting | New South Wales |
| Altitude Cowork | Victoria |
| Altrad Consulting Pty Ltd | New South Wales |
| Alyka | Western Australia |
| AM-Win | Queensland |
| Amaro | Queensland |
| Amaze Communications | New South Wales |
| AMBA Solutions Pty Ltd | New South Wales |
| Amber Electric Pty Ltd | Victoria |
| Amber Electric Pty Ltd | |
| Amber Technology | New South Wales |
| Ambire | New South Wales |