| MESI Ltd | Central Slovenia |
| Messenger | |
| MG-Soft Corporation | Drava |
| Microbium | |
| Microbium d.o.o. | |
| Microgramm | Central Slovenia |
| Microsoft Slovenia | Central Slovenia |
| Mido d.o.o. | |
| Mihov.com d.o.o. | Central Slovenia |
| Mihov.com Ltd | |
| Miklavčič marketing d.o.o. | |
| Mikro Sistemi d.o.o. | Central Slovenia |
| Mikrocop d.o.o. | Central Slovenia |
| Mikropis Holding | Savinja |
| Minoa d.o.o. | |
| MLC Ljubljana | |
| MMstudio | |
| Mobi plane | Central Slovenia |
| Modelur | Central Slovenia |
| ModriWeb Digital Agency | |
| Ms3 d.o.o. | |
| Multimedija Studio d.o.o. | Drava |
| MVM Tel d.o.o. | Central Slovenia |
| MyCol | |
| myHours | Central Slovenia |
| Nacionalnega inštituta za biologijo | |
| Nakupovanje.net | Central Slovenia |
| Nasvet.com | Savinja |
| Neo-Serv | Central Slovenia |
| Nervtech d.o.o. | |
| Netica d.o.o. | |
| NGN Media, medijska agencija d.o.o. | |
| NiceHash | |
| NiceLabel | Upper Carniola |
| NIL d.o.o. | Central Slovenia |
| NIL Ltd | Central Slovenia |
| Nimbis d.o.o. | |
| Nizkocenovci | |
| NLB d.d. | |
| Norik Systems | |
| Nova univerza | |
| Nova Vizija d.d. | Savinja |
| noviSplet.com | Central Slovenia |
| OBERIG d.o.o. | Savinja |
| Oblikovanje in izdelava spletnih strani | Central Slovenia |
| Oblikovanje.com d.o.o. | Mura |
| OFF ON komunikacije d.o.o. | |
| Olaf Scooter | |
| Optisis d.o.o. | Drava |
| Optiweb d.o.o. | |