| Mellongames S.A. | |
| Memento | Masovian |
| Memory Squared | |
| Memtor Marketing Sp. z o.o. | Masovian |
| Menedżerska Akademia Nauk Stosowanych w Warszawie | |
| Mente | |
| Mentorist.app | |
| Mentors4Starters | |
| Mera Systemy Sp. z o.o. | |
| Mercomp | Masovian |
| Merix Studio | Greater Poland |
| Merixstudio | Greater Poland |
| Merkar Sp. z o.o. | Silesian |
| Merlo Sp. z o.o. | |
| Merope | Masovian |
| Messi Design | Lubusz |
| Met.pl | Masovian |
| MetaGravity Group Ltd | |
| Metasoft S.C. | Lower Silesian |
| Metrosoft Polska Sp. z o.o. | Lesser Poland |
| MGA Sp. z o.o. | Kuyavian-Pomeranian |
| MicComp.com | Masovian |
| Michaelsoft | |
| Michał Sobczak | |
| Micro Polska | Łódź |
| MicroscopeIT Sp. z o.o. | |
| Microsoft Poland | Masovian |
| Microtech S.C. | Lower Silesian |
| Midea Sp. z o.o. | |
| Międzynarodowa Wyższa Szkoła Logistyki i Transportu we Wrocławiu | |
| Międzynarodowy Instytut Biologii Molekularnej i Komórkowej w Warszawie | |
| Migam | |
| Mikro Serwis Jarosław Wysocki | Warmian-Masurian |
| Mikrobit Sp. z o.o. | Lublin |
| Mikrokomputery Serwis S.C. | Lubusz |
| Mikron | Opole |
| MIKROSERWIS | West Pomeranian |
| Mikrowitrynie | Lublin |
| Milenium Grupa Edukacyjna | |
| Millenium Studio | |
| MIM.ai | |
| mind&matter | |
| Mind-it | |
| Mindento Sp. z o.o. | |
| Mindgram | |
| Mindz IT Sp. z o.o. sp. k. | |
| MineBest | Masovian |
| Mini Office | |
| MintyMint | |
| MiP Data & Forensic Sp. z o.o. | Masovian |