| Red Cartel | New South Wales |
| Red Fox Media | New South Wales |
| Red Hill Technology | Victoria |
| Red Meets Blue | Western Australia |
| Red Ochre Pty Ltd | Western Australia |
| Red Rain Corporation Pty Ltd | New South Wales |
| Red Search | New South Wales |
| Redalto | Queensland |
| Redant | New South Wales |
| Redback Solutions | New South Wales |
| Redback Studios Australia | |
| Redbax | South Australia |
| REDD | New South Wales |
| Redfox Corporation Pty Ltd | Queensland |
| Redfox Web Design | New South Wales |
| Redu.us Pty Ltd | Victoria |
| Reef Digital Agency | New South Wales |
| Refactor Pty Ltd | Queensland |
| Refined IT | |
| Reflex Technology Group Pty Ltd | Victoria |
| Regeneus Ltd | New South Wales |
| Regionaltel Telecommunications | New South Wales |
| Reinventure Group | New South Wales |
| Relación | Victoria |
| Relay Ventures Pty Ltd | New South Wales |
| Release Therapeutics | |
| Relectrify | Victoria |
| Relevance AI | |
| Reliable Computers Oatley | New South Wales |
| Reliance Communications | New South Wales |
| Reload Media Pty Ltd | Queensland |
| Rem Consulting | Western Australia |
| Remarkable Tech | New South Wales |
| Renew Adelaide | South Australia |
| Replica Studios, Inc. | Queensland |
| Rescuetech | New South Wales |
| Research Systems Pty Ltd | Victoria |
| Reserve Bank of Australia | New South Wales |
| Reset | Victoria |
| Resilient Digital | New South Wales |
| 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 | |