| Redfox Web Design | New South Wales |
| Redi Software | |
| RedPandas | |
| Redu.us Pty Ltd | Victoria |
| Reef Digital Agency | New South Wales |
| ReEnergise Digital | |
| Refactor Pty Ltd | Queensland |
| Refined IT | |
| Reflex Technology Group Pty Ltd | Victoria |
| Refuel Creative Pty Ltd | |
| Refume | |
| ReGen | |
| Regeneus Ltd | New South Wales |
| Regionaltel Telecommunications | New South Wales |
| Reinventure Group | New South Wales |
| Relab | |
| Relación | Victoria |
| Relational Data Systems | |
| Relectrify | Victoria |
| Relevance AI | |
| Reliable Computers Oatley | New South Wales |
| Reliance Communications Pty Ltd | New South Wales |
| Reload Media Pty Ltd | Queensland |
| Rem Consulting | Western Australia |
| Remarkable | |
| Remarkable Tech | New South Wales |
| Remote Office | |
| Renew Adelaide | South Australia |
| Replica Studios, Inc. | Queensland |
| Res-Q Computer Services | |
| Rescuetech | New South Wales |
| Research Data Australia | |
| Research Systems Pty Ltd | Victoria |
| Resilient Digital | New South Wales |
| Resolution Digital | |
| Resolve Digital | |
| Resolve IT | |
| Resolve Software | Victoria |
| Resort Software | Queensland |
| Result Driven SEO | |
| ResultIT.com.au | |
| Results Web Design | Queensland |
| Resync Digital | Victoria |
| Retail Directions | Victoria |
| Retail Express | Queensland |
| Retail Systems Australia | New South Wales |
| Rethink Marketing | |
| Retriever | New South Wales |
| Revelation Software Concepts Pty Ltd | Victoria |
| Revised | |