| Illuminated Software | South Australia |
| iMade Systems | Victoria |
| Image Traders | New South Wales |
| ImageOz.com Pty Ltd | Queensland |
| iMagic Pty Ltd | Western Australia |
| iMagic Software | Western Australia |
| IMAGING | Victoria |
| Imagion Biosystems Ltd | Victoria |
| iManageIT Business Services | Queensland |
| IMASEO Pty Ltd | Queensland |
| Imexpert | New South Wales |
| IMGuru | |
| Immediation Pty Ltd | Victoria |
| Immuron Ltd | Victoria |
| Immutable | New South Wales |
| Immutep Ltd | New South Wales |
| ImmVirX Pty Ltd | New South Wales |
| Impact Systems | New South Wales |
| Impagination | Victoria |
| Imperial College of Australia | |
| ImpexDocs | New South Wales |
| iMSX Pty Ltd | |
| Imugene Ltd | |
| In Marketing We Trust | New South Wales |
| in. Studio + Cafe | South Australia |
| Inausco Pvt Ltd | |
| InBlue Web Media Pty Ltd | New South Wales |
| Incepto Pty Ltd | |
| Incipient Infotech | |
| Incluziv Cloud | |
| INCO Australia | |
| Incotech | |
| Increaseo | New South Wales |
| Incsub, LLC | Victoria |
| Incubate | New South Wales |
| Incubeta | New South Wales |
| InDebted Holdings Pty Ltd | |
| Independent Computer Retailers (ICR) Pty Ltd | Queensland |
| Independent Studios | Victoria |
| Indepth | |
| Indigo Web Pty Ltd | Queensland |
| Inducta Pty Ltd | New South Wales |
| Industrial Recruitment Partners | Western Australia |
| Infinite Logic | Western Australia |
| Infinite Networks | Australian Capital Territory |
| Infiniti Telecommunications Pty Ltd | Victoria |
| Infinity Computer | Victoria |
| Infinity Web Development Pty Ltd | |
| Influx | Victoria |
| Info Plan Software | Victoria |