| Logit Internet Services Ltd | |
| Logon d.o.o. | Varaždin |
| Lorijen | Osijek-Baranja |
| Lost d.o.o. | City of Zagreb |
| Lumo Lab | |
| Lupus art net | City of Zagreb |
| M SAN Grupa d.d. | City of Zagreb |
| M SAN Grupa d.o.o. | |
| M+S d.o.o. | City of Zagreb |
| M-Bit | City of Zagreb |
| M-Computers | City of Zagreb |
| Majur d.o.o. | City of Zagreb |
| Makabi Agritech d.o.o. | |
| Maker d.o.o. | Varaždin |
| Makol marketing | |
| MakroMikro d.o.o. | City of Zagreb |
| Mali Hotel | Osijek-Baranja |
| Malleus d.o.o. | Sisak-Moslavina |
| Mangonel | |
| Maoio Agency | |
| Mar-Com Rijeka | Primorje-Gorski Kotar |
| Margins Ltd | |
| Margon Media d.o.o. | |
| Marsonia | Brod-Posavina |
| Marvin Global d.o.o. | |
| Mater | |
| Matija Marohnić | |
| Matrix informatika | Istria |
| Matrix informatika | |
| Matsys d.o.o. | Split-Dalmatia |
| Me.mum j.d.o.o. | |
| Media marketing d.o.o. | |
| Media Soft | |
| Media-Net | |
| Media-trend | |
| MEDIALINK - računalne i internet usluge | City of Zagreb |
| Medicom d.o.o. | |
| Megabit d.o.o. | |
| MegaNET d.o.o. | |
| Megatrend d.o.o. | City of Zagreb |
| Melcomp | Varaždin |
| Meliorate | |
| Menassati | |
| Meritum Soft d.o.o. | Varaždin |
| Međimursko veleučilište u Čakovcu | |
| MGM Studio Novel d.o.o. | |
| Mi-trade d.o.o. | Šibenik-Knin |
| MIADRIA d.o.o. | City of Zagreb |
| Micro Mag d.o.o. | Primorje-Gorski Kotar |
| Microlab d.o.o. | City of Zagreb |