| Healthinc | New South Wales |
| Healthy Shack Tech | |
| Hearne Software | Victoria |
| Heart Digital | |
| Heart Research Institute | |
| Heartburst Pty Ltd | |
| Hedley Digital | Victoria |
| Helbig Consulting | Victoria |
| Helios Power Solutions | New South Wales |
| Helium SEO | |
| Helix Digital | |
| Helix Technologies | Western Australia |
| Hello Brands | |
| Hello Clever | New South Wales |
| Hello Code | |
| Hello Digital | |
| Hello People | Western Australia |
| Help Desk Software Australia | Australian Capital Territory |
| Help.com Pty Ltd | |
| Hendon Semiconductors | South Australia |
| Hendrik-Jan Schoenmaker | |
| Henge Systems | New South Wales |
| Henry Wong Consulting | |
| Hereditree Pty Ltd | Victoria |
| HETI Higher Education | |
| Hewstone I.T. | Victoria |
| Hexagon Technology Pty Ltd | Victoria |
| Hexcen Pty Ltd | |
| Hey Juno | |
| HeyLink.me | New South Wales |
| Hi-Voltage Corporations Pty Ltd | Victoria |
| Hiary | New South Wales |
| Hide and Seek Digital | |
| High Earth Orbit Robotics Pty Ltd | New South Wales |
| Highland Creative | New South Wales |
| Highlands by Design | New South Wales |
| Highperformance Network | New South Wales |
| Hillrise Group | South Australia |
| Hills Web Design | New South Wales |
| Hilltop-Mail | New South Wales |
| Himalayas | New South Wales |
| Hinterlands Consultancy Pty Ltd | New South Wales |
| Hipfish Enterprises Pty Ltd | Queensland |
| Hippo Creative | South Australia |
| Hire Intelligence | New South Wales |
| Hire Skip | |
| HirePOS | Queensland |
| Hitec Phone Systems | Queensland |
| Hitori Pty Ltd | |
| HIVERY | New South Wales |