| Institute of Technology Australia | South Australia |
| Insync Surveys Pty Ltd | |
| inTechnology Distribution Pty Ltd | Queensland |
| Integral Logic Pty Ltd | Queensland |
| Integral Media Pty Ltd | |
| Integral Technology Solutions | Queensland |
| Integrale Marketing Pty Ltd | Victoria |
| Integralis | |
| Integrated Software Solutions | |
| Integrated Technical Software Pty Ltd | Victoria |
| Integratedfm Ltd | New South Wales |
| Integry Consulting | |
| Intellect Information Technology Pty Ltd | Victoria |
| Intellectual Technology & Communication | New South Wales |
| IntelliDesign Pty Ltd | Queensland |
| IntelligenceBank | Victoria |
| IntelligenceBank | |
| Intelligent Home | Western Australia |
| Intelligent Transport Systems Australia | Victoria |
| Intellis Pty Ltd | Victoria |
| Intellitek | |
| Intelliwolf | Western Australia |
| Intello IT | |
| Intentree | |
| InteractCard | Victoria |
| Interaction Consortium | |
| Interactive | Victoria |
| Interactive Images | Queensland |
| InteractSport Pty Ltd | Victoria |
| Intercel Pty Ltd | Victoria |
| Interconnections | Victoria |
| Interface Solutions | New South Wales |
| Interfuze Pty Ltd | |
| InterK Peptide Therapeutics Ltd | |
| Interlogic Placements | New South Wales |
| Intermast IT Solutions | Tasmania |
| International Capital Markets Pty Ltd | |
| International College of Hotel Management | |
| International College of Management, Sydney Pty Ltd | |
| International Institute of Business & Information Technology | |
| International Institute of Business & Technology (Australia) Pty Ltd | |
| International Training & Management Pty Ltd | South Australia |
| Internet Association of Australia | Western Australia |
| Internet Information Group | Queensland |
| Internet Macintosh User Group, Inc. | Victoria |
| Internode | South Australia |
| Intersect | South Australia |
| Intersect Australia Ltd | New South Wales |
| Intertec Consulting | |
| Intertech Country | South Australia |