| Name | Region |
|---|---|
| Zero41 | Western Australia |
| Zerocap | Victoria |
| zeroonetwenty | New South Wales |
| ZeroSeven | Queensland |
| Zest | |
| Zetaris | Victoria |
| Zetta | Western Australia |
| ZettaNet | New South Wales |
| Zeus IDE | New South Wales |
| Zib Digital | Victoria |
| Zimple Digital Pty Ltd | New South Wales |
| Zing Studio | |
| ZipSites | Queensland |
| Zirilio | New South Wales |
| ZOIK | Queensland |
| Zoom2u Pty Ltd | New South Wales |
| Zuni | New South Wales |
| Zuse Digital | Victoria |
| Zuzex | Victoria |
| Zveno Pty Ltd | Western Australia |
| Zynke Design | South Australia |
| Zyrous Pty Ltd | |
| Zytech | Western Australia |