| Sunrise Technologies | New South Wales |
| SUPA Web Solutions | |
| Super A | |
| Super Domains Australia | Victoria |
| SuperConcepts | New South Wales |
| SuperDataScience Pty Ltd | |
| Superior IT | Western Australia |
| Supple | |
| SupplyLink International | Queensland |
| Supportsoft Technologies | New South Wales |
| Supportsoft Technologies | |
| Supreme Supports Ltd | New South Wales |
| SuRe Procurement | |
| Surety IT | Queensland |
| Surfpacific | Queensland |
| Surpass Computer | Queensland |
| Sushi Digital | |
| SwarmFarm Robotics | Queensland |
| Swift Computers Pty Ltd | New South Wales |
| Swift Digital | New South Wales |
| SwiftTech | Queensland |
| Swinburn University of Technology | Victoria |
| Swinburne University of Technology - Information Technology | Victoria |
| Swish Connect Pty Ltd | Victoria |
| Swish Online | Western Australia |
| SwivelTech | |
| Swoop Digital | Victoria |
| Swyvl | |
| Swyvl | South Australia |
| SXiQ | Victoria |
| Sybiz Software | South Australia |
| SYD Ventures | New South Wales |
| Sydney Angels | New South Wales |
| Sydney Antennas | New South Wales |
| Sydney Branding Services | New South Wales |
| Sydney College of Divinity | |
| Sydney Institute of Business and Technology | |
| Sydney IT Solutions | |
| Sydney ITS | |
| Sydney Linux User Group | New South Wales |
| Sydney Maestro | |
| Sydney PC User Group | New South Wales |
| Sydney Search Results Pty Ltd | New South Wales |
| Sydney Software Development | |
| Sydney Startup Hub | New South Wales |
| Sydney Technology Solutions Pty Ltd | New South Wales |
| SydWeb3 | |
| Symbio Holdings Ltd | New South Wales |
| Symbion Pty Ltd | |
| Symmetri Pty Ltd | Victoria |