| Micromatic | Međimurje |
| Microsoft Croatia | City of Zagreb |
| mikroNET d.o.o. | |
| Mikronis | City of Zagreb |
| MikroStil d.o.o. | Varaždin |
| Mikrotik Hrvatska | Split-Dalmatia |
| Milinfo d.o.o. | City of Zagreb |
| Miracolina Webart | Istria |
| MIRAL d.o.o. | City of Zagreb |
| Mireo d.o.o. | City of Zagreb |
| MM servis d.o.o. | City of Zagreb |
| MMK d.o.o. | City of Zagreb |
| MMK Systems d.o.o. | |
| MMM Marketing d.o.o. | |
| Mobendo d.o.o. | City of Zagreb |
| Mobis electronic d.o.o. | City of Zagreb |
| MockupScreens | City of Zagreb |
| Mono d.o.o. | Osijek-Baranja |
| Mono Software | Osijek-Baranja |
| Motiv d.o.o. | City of Zagreb |
| Mp-Elektronika Shop | City of Zagreb |
| MPO d.o.o. | |
| Mreža5 | Istria |
| Multi Insert d.o.o. | |
| MULTILINK d.o.o. | Primorje-Gorski Kotar |
| Multus d.o.o. | |
| MyValet | |
| N-LAB Software | City of Zagreb |
| Nacionalna i sveučilišna knjižnica u Zagrebu | |
| Nanobit d.o.o. | City of Zagreb |
| NASA d.o.o. | City of Zagreb |
| Nava IT | |
| NavaIT | Split-Dalmatia |
| Nemus Lex d.o.o. | |
| Neo Studio | |
| Neoinfo d.o.o. | |
| Neoinfo Ltd | City of Zagreb |
| Neos Ltd | City of Zagreb |
| NEPTED | |
| NET d.o.o. | |
| Net Projekt | |
| Net.Studio Aranea | City of Zagreb |
| NetCom d.o.o. | |
| Netdomena d.o.o. | Lika-Senj |
| Netgen | City of Zagreb |
| Netmedia | |
| Netokracija d.o.o. | Zagreb |
| netr@ computers | City of Zagreb |
| NetVision d.o.o. | |
| Neuralab d.o.o. | City of Zagreb |