| PyCon AU | South Australia |
| PyCon Australia | |
| Pyn | New South Wales |
| Q Interactive | New South Wales |
| Q-CTRL | New South Wales |
| Q-Imaging Australia Ltd | Queensland |
| Q2 Solutions | Queensland |
| QBiotics Group Ltd | Queensland |
| Qclick Web Design | |
| QIC | |
| QiQ Communications Pty Ltd | New South Wales |
| QML Pathology | |
| QOVES | New South Wales |
| Qsic Pty Ltd | Victoria |
| Qsome | Victoria |
| QSPectral Systems Pty Ltd | Queensland |
| Qtec Systems | Victoria |
| Quantium | New South Wales |
| Quantum | New South Wales |
| Quantum Brilliance | Australian Capital Territory |
| Quantum Information Technology | Victoria |
| Quantum Software Solutions Pty Ltd | New South Wales |
| Quantum Technology Lab | Queensland |
| QuantumLinx | |
| QuantumTX | |
| Quasar Satellite Technologies Pty Ltd | New South Wales |
| Qubisoft Pty Ltd | Victoria |
| Qudos Mangement | Queensland |
| Queensland Computers | Queensland |
| Queensland Government Open Data Portal | Queensland |
| Queensland Net Pty Ltd | Queensland |
| Queensland University of Technology | Queensland |
| Queensland University of Technology - Computer science and information technology | Queensland |
| Queensland XR Hub Pty Ltd | Queensland |
| Queness | New South Wales |
| Quick Digital | Victoria |
| Quickclose Pty Ltd | Victoria |
| QuickOrder | |
| QuietGrowth Pty Ltd | |
| Quinbrook Infrastructure Partners Pty Ltd | |
| Quint Digital | Victoria |
| QuintessenceLabs | Australian Capital Territory |
| Quuxo Software | New South Wales |
| QVC Solutions Pty Ltd | Queensland |
| Qwilr Pty Ltd | New South Wales |
| R-Group International Pty Ltd | Western Australia |
| R-WEB Ltd | Western Australia |
| R3HYDR8 Pty Ltd | Victoria |
| Race Oncology | New South Wales |
| Race Oncology Ltd | New South Wales |