| Plant Communications | Victoria |
| Platinum SEO | Victoria |
| Platypus Networks | Queensland |
| Platypus Websites | New South Wales |
| PLE Computers Pty Ltd | Western Australia |
| Plenti Pty Ltd | New South Wales |
| Plerion Pty Ltd | New South Wales |
| Plotlogic Pty Ltd | Queensland |
| Plug Play Computers | New South Wales |
| Plunge Creative | New South Wales |
| PlusPoint Technologies | New South Wales |
| Pogo | Queensland |
| Point of Care Diagnostics Pty Ltd | New South Wales |
| Point Of Sale Support | Queensland |
| Poliigon Pty Ltd | Queensland |
| Polished Pixels | New South Wales |
| PolyActiva Pty Ltd | Victoria |
| Polymorphic Solutions Pty Ltd | Queensland |
| PolyNovo Ltd | Victoria |
| Pongrass Publishing Systems | New South Wales |
| Port Douglas Internet Services | Queensland |
| Portacom Pty Ltd | Western Australia |
| Portal Technology | Northern Territory |
| POS People | New South Wales |
| POS Plaza | New South Wales |
| POS Smart Solutions | Victoria |
| POS Solutions Australia Pty Ltd | Victoria |
| POSMarket | New South Wales |
| Possum Gully Software | New South Wales |
| Possum SEO | Victoria |
| Powerfirm | New South Wales |
| Powerflex Corporation | Victoria |
| Powerforce | New South Wales |
| Powerledger | Western Australia |
| Powerstaff Consulting | South Australia |
| Powertec Telecommunications Pty Ltd | Queensland |
| PPMP | Victoria |
| Practical Systens | New South Wales |
| Precedence | Queensland |
| Precise Business Solutions | Western Australia |
| Precision Computers | Queensland |
| Precisium | New South Wales |
| Preemptive Consulting Pty Ltd | Australian Capital Territory |
| Preferred Training Networks | Victoria |
| Prescient Therapeutics | Victoria |
| Prestige Communications | Western Australia |
| PretaWeb | New South Wales |
| PreviousNext | New South Wales |
| Priava | New South Wales |
| Prince | Victoria |