| MKPOL | Greater Poland |
| ML System S.A. | |
| Mobicom Sp. z o.o. | West Pomeranian |
| Mobile Madness Sp. z o.o. | |
| Mobile Reality | |
| Mobile Reality Sp. z o.o. | |
| Mobilis Robotics Sp. z o.o. | |
| Mobiltek | |
| Mobo Studio | |
| Modsen | |
| Modulus Sp. z o.o. | Lesser Poland |
| Modulus Sp. z o.o. | |
| mohi.to | Lower Silesian |
| Mojosoft | Greater Poland |
| Mojosoft Software | |
| Molecule One Sp. z o.o. | |
| Molecure | |
| Monolit IT Sp. z o.o. | |
| Monterail.com Sp. z o.o. | Lower Silesian |
| Moobite S.A. | |
| Mood Up Team | Greater Poland |
| MooseFS | Masovian |
| More Growth Sp. z o.o. | |
| more7 Polska Sp. z o.o. | Masovian |
| MoserNet | Łódź |
| Mospan | Masovian |
| MOTIFE | Lesser Poland |
| Mouton.pl | Masovian |
| Movens Capital | |
| Movie Games S.A. | |
| MP System Sp. z o.o. | Lesser Poland |
| mpanek.net | Lesser Poland |
| MPL Verbum S.A. | |
| MRE Partners | |
| MSC | Lower Silesian |
| MSH Software | Lower Silesian |
| MTA Digital | |
| MTM-INFO | Subcarpathian |
| MUG | Greater Poland |
| Multi-COM Sp. z o.o. | Subcarpathian |
| Multi-PC | Świętokrzyskie |
| Multicall | Masovian |
| Multimedia Cafe | Pomeranian |
| Multimedia Communication Sp. z o.o. | Lesser Poland |
| Multisoft S.A. | |
| Multiuser | Łódź |
| MWT Solutions S.A. | Greater Poland |
| MyDevil | Lesser Poland |
| Mykk S.C. | Greater Poland |
| MyLED Sp. z o.o. | |