| Maison du Net | Haute-Savoie |
| Maitreweb | Isère |
| Majandcy Informatique | Gironde |
| Majestique Diffusion | |
| Majinga | Paris |
| Major Consultants | Hérault |
| Maketheweb | |
| Makheia Group | Paris |
| Maki | |
| Makina Corpus | Haute-Garonne |
| Malabar Design | Seine-Saint-Denis |
| Malibo | Paris |
| Malou | |
| Malt | Paris |
| Malt | |
| Maltem | Hauts-de-Seine |
| Mamasam | Val-de-Marne |
| Manager.one | |
| Mandalore Partners | |
| Mandarine Business School | Nord |
| Mangrove | |
| Manhattan S.A. | Métropole de Lyon |
| ManoMano | |
| Mansa | |
| Manta Digital | |
| Mantra | |
| Mantra Investment Partners | |
| Manty | |
| Manudax | Val-de-Marne |
| Mapado | |
| MAPAO | Gironde |
| Mapatho | |
| Mapaye | |
| Mapping Control | |
| Mapreg | |
| MaPS System | |
| Maqbar Diffusion | Yvelines |
| Marben Products | Hauts-de-Seine |
| Marble | |
| Marc Hertzog | Paris |
| Marcom Connect | Tarn-et-Garonne |
| Marie-Antoinette Group | |
| Marine-Label | Loire |
| Maritime Systems | Pyrénées-Atlantiques |
| Market Academy | Bouches-du-Rhône |
| Marketing direct création | Rhône |
| Marketparts | |
| Marlink S.A.S. | Paris |
| Marmelab | |
| Marozed | Paris |