| BugHerd Pty Ltd | Victoria |
| Build Digital Growth | |
| Buildkite | Victoria |
| Buildsoft Pty Ltd | New South Wales |
| Buildxact | |
| Built At Lightspeed | |
| Built to Roam Pty Ltd | |
| BuiltWith | |
| Bulk SMS | Victoria |
| Burjolas Pty Ltd | New South Wales |
| Burncool | New South Wales |
| Burnet Institute | |
| Burning Fruit | |
| 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 Turnaround Services | |
| Business Victoria | Victoria |
| Business Warriors Digital Marketing Agency | |
| Business Works Pty Ltd | Victoria |
| BusyWeb | Queensland |
| Butn | Victoria |
| Butterfly | |
| Butterfly Internet | Victoria |
| Button Web Design | |
| Buzinga | |
| Buzz A Geek | Queensland |
| byMarketers | New South Wales |
| BYOjet Travel | |
| Byte Digital | |
| Byteback Computing | New South Wales |
| Bytestrping | Queensland |
| C Digital | Victoria |
| C Point Pty Ltd | South Australia |
| C&B Marketing Pty Ltd | |
| C. Joseph Studio | |
| c8apps Pty Ltd | Victoria |
| C9 Pty Ltd | |
| C9ADS | |
| 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 |