| Marstrand Innovation | |
| MatchOffice | |
| Matchware A/S | Central Denmark Region |
| Matriks A/S | Capital Region of Denmark |
| Matter | |
| Mazepay A/S | |
| MB Solutions A/S | Region of Southern Denmark |
| MC2 Therapeutics A/S | |
| MCB | Central Denmark Region |
| ME Management Enterprise A/S | Capital Region of Denmark |
| Meabco A/S | |
| MediaSolution ApS | |
| MedTrace | |
| MedusaJS, Inc. | |
| MedWare ApS | |
| MeetinVR | |
| Mekoprint A/S | |
| Memo IT | Region Zealand |
| Mentor IT | Region of Southern Denmark |
| Merlinia A/S | Capital Region of Denmark |
| Mermaid Consulting ApS | North Jutland Region |
| Michael Rurup Andersen | Capital Region of Denmark |
| Micro-Sys ApS | |
| Micropartner A/S | |
| MicroShade A/S | |
| Microsoft Denmark | Capital Region of Denmark |
| Microsys | Central Denmark Region |
| MicroTech Software A/S | |
| Mifon | Central Denmark Region |
| Miinto Group | Capital Region of Denmark |
| Milcom | Capital Region of Denmark |
| Milestone Systems A/S | |
| Minerva Group A/S | Central Denmark Region |
| MinervaX ApS | |
| Mingler | Capital Region of Denmark |
| Minisoft | |
| MipSalus ApS | |
| Mjolner informatics | |
| MM Vision | Region Zealand |
| MM-Graphics | Region Zealand |
| Mobil.nu | Capital Region of Denmark |
| Mobile Industrial Robots ApS | Region of Southern Denmark |
| MobilePay | |
| MobilePeople | |
| Mobilsiden.dk | Capital Region of Denmark |
| Mobitech Telecom | Capital Region of Denmark |
| MOCH A/S | Capital Region of Denmark |
| MochaSoft | |
| MochaSoft ApS | North Jutland Region |
| Modbus Tools | Central Denmark Region |