| Seja Design | Western Australia |
| Selborne Biological Services | |
| Select Marketing | |
| Select Software Group | New South Wales |
| Selfmade Advice Services Pty Ltd | Victoria |
| SelfWealth | Victoria |
| Selling Online Made Simple | |
| SEM::SME | New South Wales |
| Sementis | South Australia |
| Semico | New South Wales |
| Senetas Corporation Ltd | Victoria |
| Senex Energy | |
| Senex Energy Ltd | Queensland |
| Senortech | Queensland |
| Sensis Pty Ltd | Victoria |
| Sensorem | Western Australia |
| Sentia Australia Pty Ltd | New South Wales |
| Sentient Computing | Western Australia |
| Sentient Software | Victoria |
| Sentinel Data Security | Victoria |
| Sentius | |
| Sentius Digital | |
| SEO Advantage Australia | Victoria |
| SEO Company Pty Ltd | New South Wales |
| SEO Consultancy | New South Wales |
| SEO Consultant | Victoria |
| SEO Expert Melbourne | |
| SEO for Small Business Australia | |
| SEO Gold Coast | |
| SEO Melbourne | |
| SEO Melbourne Consultant - Tony Adams | Victoria |
| SEO North Sydney Pty Ltd | |
| SEO Plans | |
| SEO Premier | |
| SEO PRO | New South Wales |
| SEO Services Australia | New South Wales |
| SEO Sydney | New South Wales |
| SEO Sydney Experts | |
| SEO Sydney Solutions | New South Wales |
| SEO Web Logistics | Queensland |
| SEO Worx | |
| Seo-Xpress.com | New South Wales |
| SEO4U Australia | |
| SEOBookLab | |
| SEOcycle | |
| Seonix Bio | |
| SEOVerve | |
| September AI Labs | |
| Serendipity Software | New South Wales |
| Seriously Good Design Pty Ltd | |