| MESA Electronics GmbH | Bavaria |
| Meshcapade GmbH | |
| meshcloud GmbH | |
| Meshmerize GmbH | |
| Messcomp Datentechnik GmbH | Bavaria |
| MESSOTRON Hennig GmbH & Co. KG | Hesse |
| Mestrona GbR | Rhineland-Palatinate |
| Mesytec GBR | Bavaria |
| Meta-fusion GmbH | North Rhine-Westphalia |
| Meta-Level Software AG | Saarland |
| Metabion International AG | |
| Metacarp GmbH | |
| MetaComp GmbH | |
| metacrew Group GmbH | |
| metafinanz Informationssysteme GmbH | |
| MetaGer | Lower Saxony |
| metalogic GmbH | Bavaria |
| Metals Hub GmbH | |
| Metamove GmbH | Bavaria |
| Metanoia IT Solutions | |
| METANOVIS Visuelle Kommunikation | |
| Metaphacts | |
| Metas GmbH | North Rhine-Westphalia |
| MetaSystems Hard & Software GmbH | |
| MetaTexis Software and Services | Rhineland-Palatinate |
| Metaways Infosystems GmbH | Hamburg |
| Metec Electronic GmbH | Lower Saxony |
| Metechon AG | |
| methodica software GmbH | |
| MetisMotion GmbH | |
| metr Building Management Systems GmbH | |
| Metrikflow | |
| METRO Markets GmbH | |
| METRO Xcel | |
| Metrodata GmbH | Lower Saxony |
| Metronics Semiconductor Equipment GmbH | Bavaria |
| METRONOMIA Clinical Research GmbH | |
| Metzconsult GmbH | |
| Meurologic | North Rhine-Westphalia |
| Meuser IT-Service | North Rhine-Westphalia |
| MEX EDV Marketing- und Expertensysteme GmbH | Rhineland-Palatinate |
| Meyer Apps GmbH | |
| Meyer Misgin Media GmbH | Berlin |
| MFC Solutions GmbH | |
| MFMC GmbH & Co. KG | North Rhine-Westphalia |
| MG Industrieelektronik GmbH | Baden-Württemberg |
| MG Software Entwicklung | North Rhine-Westphalia |
| MG Systems GmbH | Saxony |
| MG Training GmbH | Hesse |
| MG-Systems GmbH | Saxony |