| Bud Agency | Western Australia |
| Buddy Platform Ltd | South Australia |
| Budget Web Design | South Australia |
| BugHerd Pty Ltd | Victoria |
| Buildkite | Victoria |
| Buildsoft Pty Ltd | New South Wales |
| BuiltWith | |
| Bulk SMS | Victoria |
| Burjolas Pty Ltd | New South Wales |
| Burncool | New South Wales |
| Business and Technology Precincts | Queensland |
| Business Angels | New South Wales |
| Business Computer Support | New South Wales |
| Business Databases Australia Pty Ltd | Western Australia |
| Business IT & Telecommunications Solutions | New South Wales |
| Business Solutions Plus | New South Wales |
| Business Victoria | Victoria |
| Business Works Pty Ltd | Victoria |
| BusyWeb | Queensland |
| Butn | Victoria |
| Butterfly Internet | Victoria |
| Buzz A Geek | Queensland |
| byMarketers | New South Wales |
| Byteback Computing | New South Wales |
| Bytestrping | Queensland |
| C Digital | Victoria |
| C Point Pty Ltd | South Australia |
| c8apps Pty Ltd | Victoria |
| CA Management Services Pty Ltd | Western Australia |
| Cabletecs | South Australia |
| CabMaster Software | Victoria |
| CAD International | New South Wales |
| CADDIT Software | |
| CaddWest Bureau | Western Australia |
| Cadro | Victoria |
| Cadzow TECH Pty Ltd | South Australia |
| Cairns-Copy | Queensland |
| Calibre Analytics | Victoria |
| Calidad Distributors Pty Ltd | New South Wales |
| Call Dynamics Pty Ltd | |
| Callbox | |
| Calumino | New South Wales |
| Calvert Technologies | South Australia |
| Calxa Australia Pty Ltd | Queensland |
| Cambia | |
| Cambridge Informatics | New South Wales |
| Camms | |
| Campad Electronics | Queensland |
| Campaing Digital Pty Ltd | New South Wales |
| Canary IT Solutions | New South Wales |