| HotDoc Online Pty Ltd | Victoria |
| Hotline IT | New South Wales |
| Hotmix Group | Western Australia |
| Hotpink Websites | Queensland |
| Hotstart Software | Western Australia |
| House Digital | Western Australia |
| Housley Communications Pty Ltd | New South Wales |
| Howling Frog | New South Wales |
| HS Coms Digital | |
| HSBC Bank Australia Ltd | New South Wales |
| Hub Australia | Victoria |
| Hubway | New South Wales |
| Human Digital | New South Wales |
| Human Edge Software Corporation Pty Ltd | Victoria |
| Human Element IT Pty Ltd | Victoria |
| Human IT | Victoria |
| Human Pixel Pty Ltd | Victoria |
| Humaniti | New South Wales |
| Huon IT | New South Wales |
| Hutchinson Software Pty Ltd | New South Wales |
| Hutchison Telecommunications (Australia) Ltd | New South Wales |
| Hy-Q International (Australia) Pty Ltd | Victoria |
| Hybrid Electronics Australia Pty Ltd | Victoria |
| Hype Marketing | |
| Hyperactive Design | Queensland |
| Hyperdyne Software | Queensland |
| HyperWrite Pty Ltd | Victoria |
| I Hate My PC | Tasmania |
| I-Nex Corporation | South Australia |
| I-Tech | New South Wales |
| I.T. Basecamp | New South Wales |
| I.W.S. Internet Web Solutions | Victoria |
| i2i Logic (Australia) Pty Ltd | Victoria |
| i4U | Queensland |
| IA Design | South Australia |
| iBase Solutions | New South Wales |
| IBC Digital | Western Australia |
| IBISWorld | Victoria |
| iBoss | New South Wales |
| ICA Solutions | New South Wales |
| iCetana Pty Ltd | Western Australia |
| Icom Australia Pty Ltd | Victoria |
| iComply Pty Ltd | Victoria |
| ICON Technologies | Western Australia |
| ICP GLOBAL Pty Ltd | New South Wales |
| Idea Box Pty Ltd | Victoria |
| Idealpos Solutions | Queensland |
| Identitii Ltd | New South Wales |
| IDG Communications Pty Ltd | New South Wales |
| IDP Solutions Pty Ltd | New South Wales |