| Microtech S.r.l. | Siena |
| MIcrowave Filters | Milan |
| MICSO S.r.l. | Pescara |
| MiDo S.r.l. | Ferrara |
| Midori S.r.l. | |
| Migratory Data Systems S.r.l. | |
| Milan Fintech Summit | Milan |
| Milano Investment Partners SGR S.p.A. | |
| Milkman S.p.A. | |
| Millennium Dataware S.r.l. | Alessandria |
| Miluma Factory Care | Naples |
| MimeTech S.r.l. | |
| Minisumo.net | Rome |
| MioAssicuratore S.r.l. | |
| Mipot Hi-Tech Company S.p.A. | Friuli-Venezia Giulia |
| Miraitek S.r.l. | |
| Miriade S.r.l. | Vicenza |
| Mirta | Milan |
| Mister SEO | Bari |
| MisterPOS | Trento |
| Mitan S.r.l. | Treviso |
| Mitan Telematica S.r.l. | Milan |
| Mitconsulting | Bari |
| MITO Technology S.r.l. | |
| MIX S.r.l. | Milan |
| miXweb | Macerata |
| MKT S.r.l. | Milan |
| MM Imagine S.a.s. | Lecco |
| MM-One Group S.r.l. | Venice |
| MNet S.r.l. | Mantua |
| MOCA Interactive S.r.l. | Treviso |
| Mod Security S.r.l. | Brescia |
| Modefinance | Friuli-Venezia Giulia |
| Modelway | Turin |
| Modi Nuovi S.a.s. | Padua |
| Modyo S.p.A. | |
| Mogu S.r.l. | |
| Mokadom S.r.l. | Milan |
| Molteni Therapeutics S.r.l. | |
| MOMA S.p.A. | Salerno |
| MON5 S.r.l. | |
| MondoServer IT | Lecce |
| Mondoweb S.r.l. | Rome |
| Money360.it S.p.A. | |
| Montebelluna Linux Users Group | Treviso |
| Moonstone Venture Capital | |
| Mopso | Milan |
| Mosft.it | Novara |
| Motion Engineering S.r.l. | Biella |
| Motocicli Italiani S.r.l. | |