| AxonJay | |
| B & F | Brussels-Capital |
| B&B Computer Solutions | Walloon Brabant |
| B-Sprouts | |
| B-U-T N.V. | Antwerp |
| B-Webdesign | East Flanders |
| B. Rekencentra N.V. | Antwerp |
| B12 Consulting | |
| BA N.V. | Flemish Brabant |
| Babelway S.A./N.V. | Walloon Brabant |
| Backoffice Europe | Antwerp |
| BakerMEN N.V. | Antwerp |
| Balzac | |
| BAN Flanders | |
| Bandito Studio | Hainaut |
| Barclaey, Inc. | Antwerp |
| Bausch Datacom | Flemish Brabant |
| BBI Solutions | |
| BDE Service Center | Hainaut |
| Beatswitch | |
| Bee Computing | Namur |
| BeeBole | Brussels-Capital |
| Beecom | East Flanders |
| Beeple | Antwerp |
| Behostings.com | Walloon Brabant |
| BeJS | |
| Belcenter | Walloon Brabant |
| BeLead S.P.R.L. | |
| Belfius | |
| Belgian Association of Marketing | Flemish Brabant |
| Belgian Java User Group | Brussels-Capital |
| Belgian Mathematical Society | Brussels-Capital |
| Belgian Mobile ID S.A./N.V. | |
| Belgian National Internet eXchange | Brussels-Capital |
| Belgian RISC OS user group | Antwerp |
| BelgianTelecom | Antwerp |
| Belgisch Instituut voor Lastechniek | |
| Belgisch Instituut voor postdiensten en telecommunicatie | Brussels-Capital |
| Belgium Data Recovery | |
| Belighted | Walloon Brabant |
| Belighted S.R.L. | |
| Bells | Limburg |
| Belnet | Brussels-Capital |
| Belram N.V./S.A. | Brussels-Capital |
| Beltug | East Flanders |
| Bene.be | East Flanders |
| Benoit Elektronika N.V. | West Flanders |
| Benoit Libert | Namur |
| Berlin Creative Studio | |
| BICS SA/NV | Brussels-Capital |