| Logpoint | Capital Region of Denmark |
| Lophora | |
| Lorenz Technology ApS | |
| LS Control A/S | Region Zealand |
| LT Automation Aalborg A/S | |
| Lua | Capital Region of Denmark |
| Lun Energy | |
| Lunar A/S | |
| Lund & Andresen IT ApS | Region of Southern Denmark |
| Lundbeckfonden | |
| lykholt IT PARTNER | North Jutland Region |
| Lyngsoe Systems A/S | |
| Lytzen IT A/S | North Jutland Region |
| Lægernes Pension | |
| M media ApS | North Jutland Region |
| M Networks A/S | Capital Region of Denmark |
| Macrocom | Region of Southern Denmark |
| MacVision ApS | Region Zealand |
| Mads Brodt | |
| Maersk | |
| Make IT Right | Capital Region of Denmark |
| Makeable ApS | |
| MAKEEN Energy | |
| MakeImpact ApS | |
| Makropol | |
| Mancofi A/S | |
| Mansoft A/S | |
| MapsPeople | |
| Mark Information A/S | Capital Region of Denmark |
| Marstrand Innovation | |
| MatchOffice | |
| Matchware A/S | Central Denmark Region |
| Matriks A/S | Capital Region of Denmark |
| Matter | |
| Mazepay A/S | |
| 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 Pharma A/S | |
| MedusaJS, Inc. | |
| MedWare ApS | |
| Meedo | |
| MeetinVR | |
| Mekoprint A/S | |
| MemeCam | |
| Memo IT | Region Zealand |