| Jala Design | New South Wales |
| Jam Jar | Victoria |
| Jamell Cables | Western Australia |
| James Cook University | Queensland |
| James Cutts | New South Wales |
| James Friend | |
| James Turner | |
| Japha Enterprises Pty Ltd | Queensland |
| Jason Watmore's Blog | New South Wales |
| Jaycar Pty Ltd | New South Wales |
| JB Hi-Fi Group Pty Ltd | Victoria |
| JCH Media Group | |
| JD Stride Pty Ltd | |
| Jeal Computer Services Pty Ltd | New South Wales |
| Jed Micro Pty Ltd | Victoria |
| Jeeves.Plus Pty Ltd | New South Wales |
| Jellyweb Digital Media | New South Wales |
| Jentla Pty Ltd | Queensland |
| Jericho Web Services | Queensland |
| Jetabroad Pty Ltd | |
| Jezweb | New South Wales |
| JG Advantage Pty Ltd | South Australia |
| JG Management Consulting | |
| JH Computer Services | Western Australia |
| Jhavtech Studios | |
| Jiga | |
| JigSpace | Victoria |
| Jim's Antennas | Victoria |
| Jimmyweb Pty Ltd | New South Wales |
| JKB Web Solutions | Tasmania |
| JLM Audio | Queensland |
| JMC Academy | |
| JobAdder Operations Pty Ltd | New South Wales |
| John Garnsworthy & Associates Pty Ltd | Queensland |
| Johnny Appleseed GPS | Queensland |
| Jonathan Bird | |
| Joomlabamboo | Victoria |
| Josef | Victoria |
| Josie Brown Web Design | Australian Capital Territory |
| Joust Software Pty Ltd | South Australia |
| Joyer | New South Wales |
| JP Consulting | Queensland |
| JR Computing Solutions | South Australia |
| JRoc Digital | |
| Jschool | |
| JTB Studios | Victoria |
| JTC Technology | New South Wales |
| Juicebox | |
| Julian Cochran's programming projects | South Australia |
| Jumbo Vision | Western Australia |