| Stack Digital | |
| Stack Sols | |
| STACK.aero | |
| Stairways Software Pty Ltd | Queensland |
| Staley Automation | Victoria |
| Stamina Software | New South Wales |
| Stanski Group | Victoria |
| Star 3 Media | Western Australia |
| Star Business Solutions | Victoria |
| Star Config | New South Wales |
| Star-tek Technology Pty Ltd | Victoria |
| Starack | |
| Starfish Ventures Pty Ltd | Victoria |
| Starpharma Holdings Ltd | |
| Start Digital | Western Australia |
| StartInno Ventures Pty Ltd | New South Wales |
| Startmate | Victoria |
| StartSomeGood | |
| Startup Adelaide | South Australia |
| Startup Catalyst Pty Ltd | Queensland |
| Startup Circle | New South Wales |
| Startup Creative | New South Wales |
| Startup Daily | New South Wales |
| Startup Melbourne | Victoria |
| Startup Muster | |
| Startup Names | |
| Startup News | Western Australia |
| Startup Victoria | Victoria |
| Startup WA | Western Australia |
| StartupAUS Ltd | New South Wales |
| Startupbootcamp Australia | Victoria |
| Stat Health Systems | Queensland |
| State Government of Victoria Innovation Network | Victoria |
| State of Social | |
| statistiXL | Western Australia |
| Statronics Power Supplies | New South Wales |
| Statseeker | |
| StayOnHire | |
| Steadfast | New South Wales |
| Steadfast Solutions | Victoria |
| Steep Digital | Western Australia |
| Step Ahead Software Pty Ltd | New South Wales |
| Step Change | New South Wales |
| Step Two Designs Pty Ltd | New South Wales |
| Step Up Digital Marketing | |
| Stepinsight | |
| Sterland | New South Wales |
| StewArtMedia | Victoria |
| STI Engineering Pty Ltd | Western Australia |
| Stickman | New South Wales |