| MAGNOTHERM Solutions GmbH | |
| magnussoft Deutschland GmbH | Saxony |
| Magrathea Informatik GmbH | Lower Saxony |
| MagSoft Computer und Software | Rhineland-Palatinate |
| Magton GmbH | |
| Mahle GmbH | |
| Mahr & Müller Informationssysteme GmbH | Hesse |
| Mahr EDV GmbH | Berlin |
| Maihöfer GmbH | North Rhine-Westphalia |
| Mail Com Dialogmarketing GmbH | Bavaria |
| Mail Elektronik Vertriebs GmbH | Bavaria |
| Mailbutler | |
| Mailingwork - w3work Gneuß & Arnold GbR | Saxony |
| mailo AG | |
| Mailvelope GmbH | |
| MainConcept GmbH | North Rhine-Westphalia |
| Mainmatter GmbH | |
| MainSoft GmbH | Bavaria |
| Maintainet AG | |
| Maintect GmbH | |
| Mainz Biomed N.V. | |
| MAIT Germany GmbH | |
| MAIT GmbH | Baden-Württemberg |
| MaiTec Computer und Elektronik | Bavaria |
| Maja.cloud | |
| Majornet IT-Systemhaus | Hesse |
| Make-IT Initiative | North Rhine-Westphalia |
| makeit online | North Rhine-Westphalia |
| Makers IT Services GmbH | Berlin |
| Makers' Den GmbH | |
| Makersite GmbH | |
| Maklersoftware.com GmbH | Berlin |
| MAKOM Gesellschaft für Marketingkommunikation mbH | |
| MAKONIS GmbH | |
| Makrolog AG | Hesse |
| Mallia Innovations GmbH | |
| Mallia Therapeutics GmbH | |
| Malottki GmbH | Saxony-Anhalt |
| Malt Community GmbH | |
| Malte Schonvogel | |
| Maltego Technologies | |
| Malz++Kassner GmbH | Lower Saxony |
| Mambu GmbH | Berlin |
| Mamtemic GmbH | Schleswig-Holstein |
| man CityNet | Saxony |
| MAN Impact Accelerator | |
| managedhosting.de GmbH | Berlin |
| Management Project Consulting GbR | Hamburg |
| Manager SQL | North Rhine-Westphalia |
| Mandala Labs GmbH | |