| Canberra Data Centres Pty Ltd | Australian Capital Territory |
| Canberra Innovation Network | Australian Capital Territory |
| Canberra Linux Users Group | Australian Capital Territory |
| Canberra Technology Park | Australian Capital Territory |
| Candela.info | New South Wales |
| Canon Australia Pty Ltd | New South Wales |
| Canopus Networks | New South Wales |
| Canterbury Partners Pty Ltd | |
| Canthera Discovery Ltd | Victoria |
| Canva | New South Wales |
| CANVAS | New South Wales |
| Canvas | New South Wales |
| Cap Connect | Queensland |
| Capax Technology | New South Wales |
| Cape Pty Ltd | New South Wales |
| Capital Information Services | New South Wales |
| Capital Office Business Software | New South Wales |
| Capital Partners Consulting Pty Ltd | Western Australia |
| CapitalRoad Financial Pty Ltd | Victoria |
| Captovate | |
| Carbon Offset by Greenfleet | New South Wales |
| Card Acess Services Pty Ltd | New South Wales |
| CardieX Ltd | New South Wales |
| Careers in Space Pty Ltd | New South Wales |
| Carina Biotech | South Australia |
| Carisma Solutions | |
| Carl Chapman | Queensland |
| Carnegie Mellon University in Australia | South Australia |
| Carringbush.Net | Victoria |
| Cartherics Pty Ltd | Victoria |
| Carthona Capital AFS | New South Wales |
| Cartridges Direct | Victoria |
| CartridgeSpecialists.com.au | Victoria |
| CAS Netlink (Aust) Pty Ltd | Victoria |
| Cascade | New South Wales |
| Case Management Society of Australia | Queensland |
| Cash Focus | New South Wales |
| Cashpoint ATM Company | New South Wales |
| Castaway Forecasting | New South Wales |
| Catalyst IT Australia Pty Ltd | New South Wales |
| Catalyst Media | Queensland |
| Catalyst Strategic | Victoria |
| Catchy Pages | New South Wales |
| Cathco Consultancy Pty Ltd | Queensland |
| Cazazz | Queensland |
| CBDWeb | Victoria |
| CBE Pure Solutions | Victoria |
| CBIT Internet & Hosting | Australian Capital Territory |
| CBL Data Recovery Technologies Pty Ltd | Queensland |
| CBM Computers | New South Wales |