| Micrològic, S.L.U. | Girona |
| Micromedia, S.L. | A Coruña |
| Micronet, S.A. | Madrid |
| Microsa | Sevilla |
| MicrosShop Tiendas, S.L. | Valencia |
| MicruX Fluidic, S.L. | Asturias |
| Midatel Tecnología, S.L. | |
| Milenium System Soluciones, S.L. | Zaragoza |
| Millenium Soft | Madrid |
| Millennials Consulting | |
| Milú | |
| Mimark | |
| Mind Your Gap Studio, S.L. | Barcelona |
| Minerva Hosting, S.L.U. | Madrid |
| Minicoders21, S.L. | Barcelona |
| Minimum.run | |
| Miniprice Express | A Coruña |
| Minoryx | Barcelona |
| Mio Consulting Inteligencia de Negocio, S.L.U. | Madrid |
| MiPc OK | Murcia |
| Miru Studio VR, S.L. | Gipuzkoa |
| Mitae | Biscay |
| Mitiga Solutions | Barcelona |
| MiTSoftware.com | Alicante |
| Miura Partners | Barcelona |
| Miweb | Barcelona |
| mjn-neuro | Girona |
| MKS Work Together, S.L. | Madrid |
| MLCode | |
| MO Advertising Global | |
| Mobbeel | Cáceres |
| Mobile Dreams Ventures | |
| Mobile Media Content | |
| Mobile One2One | Madrid |
| Mobile World Capital | Barcelona |
| Mobilers | Madrid |
| Mobincube | |
| Mobivery | Sevilla |
| Modelos Informáticos, S.L. | Valencia |
| Modemsys, S.L. | Madrid |
| mODUSoPERANDI Publicidas, S.L.U. | Valencia |
| Moira Capital Partners | Madrid |
| Moirai Biodesign | Barcelona |
| MOIXÓ, S.L. | Barcelona |
| Mola Factory, S.A. | Balearic Islands |
| Momo Pocket | Granada |
| MomSoft | Madrid |
| MoncaSoft, S.L. | Girona |
| Mondragon Unibertsitatea | |
| Monei Digital Payments, S.L. | Málaga |