| Marinomed Biotech AG | |
| Mario Ranftl | |
| Marko Denic | |
| Markus Stefan Websolutions | Vienna |
| Martin Bernauer | Vienna |
| Martin Salbaba Softwaredesign | Vienna |
| Martin Thaller IT Dienstleistungen | Vienna |
| mass:werk | Vienna |
| MASSIVE ART WebServices GmbH | Vorarlberg |
| Master Design GmbH | Burgenland |
| MasterSoft Software Solutions Ltd | Tyrol |
| Match-Maker Ventures | |
| Mathmod | Vienna |
| Matrixware Information Services GmbH | Burgenland |
| Max Perutz Labs Vienna | |
| MBIT Solutions GmbH | Lower Austria |
| MC Components Ewald Mogg GmbH | Burgenland |
| MCI Management Center Innsbruck Internationale Hochschule GmbH | Tyrol |
| MCSoft Security | Styria |
| MCW Handelsgesellschaft mbH | Vienna |
| mDesign | Upper Austria |
| Mechatronic Systemtechnik GmbH | |
| Medani GmbH | Vienna |
| Media Apparat GmbH | |
| Media Beesign | Vienna |
| mediainvent Service GmbH | Vienna |
| Medicus AI | Vienna |
| Medizinische Universität Graz | Styria |
| Medizinische Universität Innsbruck | |
| Medizinische Universität Wien | |
| medPhoton GmbH | |
| MEHR Datasystems GmbH | Styria |
| MeisterLabs | |
| Mesonic Datenverarbeitung GmbH | Lower Austria |
| Metalab | |
| Metaloop | |
| MH | direkt | Vorarlberg |
| Mi'pu'mi Games GmbH | Vienna |
| MIA Systems | Vorarlberg |
| Michael Prokop | Styria |
| Micro-Systeme Entwicklungs und Produktions GmbH | Salzburg |
| Microsoft Austria | Vienna |
| Mikas ISP Werbe GmbH | Salzburg |
| Mimo GmbH | |
| Mind42 | Vienna |
| Mindbreeze GmbH | |
| MINTED | |
| mlc.media KG | Tyrol |
| MM-Webconsulting | Vienna |
| MobFox Mobile Advertising GmbH | Vienna |