| LASystems.be | Flemish Brabant |
| LC2 S.P.R.L. | Brussels-Capital |
| LCL Belgium N.V. | Flemish Brabant |
| LCR Telecom N.V. | Antwerp |
| Lean Fund S.A./N.V. | |
| LEDS React | |
| Legend Software | Walloon Brabant |
| Lesterius | East Flanders |
| Level27 B.V. | Limburg |
| Levelapp | |
| Lexitech | |
| LHM N.V. | Antwerp |
| LIEGE science park | Liège |
| Lifepowr N.V. | Antwerp |
| lifetech.brussels | Brussels-Capital |
| Limecraft | |
| Linkare | |
| Linkbuilding & SEO | |
| Linux Belgium B.V.B.A. | Flemish Brabant |
| Linux User Group de la ville de Namur | Namur |
| LinuxComputers | |
| Lobbi | |
| Logicalsys | Walloon Brabant |
| Logidrive | Walloon Brabant |
| LoLiGrUB A.S.B.L. | Hainaut |
| Look & Fin S.A. | |
| Louvain-la-Neuve Science Park | Walloon Brabant |
| LRM | |
| LSEC - Leaders In Security | |
| LSP.expert | |
| LUCA School of Arts | |
| Ludus | |
| LuGus Studios | |
| Lusis Communication Responsable | |
| Luzmo | |
| LynxCare Clinical Informatics N.V. | |
| M-sphere | Flemish Brabant |
| Maastery | |
| MAC Telecom | Brussels-Capital |
| Madewithlove | Flemish Brabant |
| MaggiC Solutions | Liège |
| Mail.be | Brussels-Capital |
| Mainteneo | |
| MAMS Computers | Hainaut |
| Manol Networks | Limburg |
| Manual.to | |
| MAPA B.V.B.A. | West Flanders |
| Marbles | Antwerp |
| Marple | |
| Massive Media | East Flanders |