| Madison Group Enterprises | Queensland |
| Maestro Pty Ltd | New South Wales |
| Mag-Tek Pty Ltd | New South Wales |
| Magellan Stem Cells | |
| Magento Professionals | New South Wales |
| MagicBrief Pty Ltd | New South Wales |
| Magicdust | New South Wales |
| Magik Digital | Queensland |
| Magneto Communications | New South Wales |
| MailEnable | Victoria |
| Maileroo | |
| MailGuard Pty Ltd | Victoria |
| Main Sequence Ventures | |
| Mainframe Cloud Pty Ltd | New South Wales |
| Mainpac | New South Wales |
| MainPlan Systems | Victoria |
| Maintenance Experts | Queensland |
| Majestic Computer Technology | Victoria |
| Major Creative | |
| Make My Website | |
| Make Search Work | |
| Makerspace Adelaide | South Australia |
| Making Spaces Design | Victoria |
| Mamba Digital | Victoria |
| Mamma | Victoria |
| Mammoth Media Pty Ltd | Queensland |
| Manage IT Pty Ltd | |
| Managed Growth Australia Pty Ltd | |
| Managed SEO | New South Wales |
| Managed Solutions | Queensland |
| Manatronics Pty Ltd | Queensland |
| Mandalay Funds Management Pty Ltd | |
| MandoeMedia | |
| Mangano IT | Queensland |
| Manjrasoft Pty Ltd | Victoria |
| Manly Electronics | New South Wales |
| ManomayWeb | |
| Mantel Group Pty Ltd | |
| Mantis Technologies | Queensland |
| MaoWebstyle | New South Wales |
| MapData Services Pty Ltd | New South Wales |
| Maple Cloud | |
| Marby Apps | Victoria |
| March-hare.com | New South Wales |
| Marcus Oldham College | Victoria |
| Margarita Media | |
| Mark Gurry & Associates | Victoria |
| Markar Consulting | Victoria |
| Marken Hosting | Victoria |
| Market Creations Agency | Western Australia |