| BrainDonors | |
| Braingineers International B.V. | |
| Brainport Eindhoven | North Brabant |
| BrainSys | |
| Brainwave Systems | North Holland |
| Brama Systems B.V. | |
| Brand New Day | |
| Brandium Agency | |
| Bratpack | North Holland |
| Braventure | North Brabant |
| Bravo | Limburg |
| Bravoure IT | |
| Bread University of Applied Sciences | North Brabant |
| Breathomix | South Holland |
| Bredero Groep | Overijssel |
| Breedband Nederland | Gelderland |
| Breedbandshop | |
| Breekveldt Automatisering B.V. | Gelderland |
| Bridge Systems B.V. | South Holland |
| BridgeFund B.V. | |
| Bright Answers | South Holland |
| Bright Idiots B.V. | |
| Bright Photonics B.V. | North Brabant |
| BRIGHT Software B.V. | |
| BrightMarbles | |
| Brilliance Hosting | Friesland |
| Brimit B.V. | |
| Brimore Holding B.V. | |
| Brin | Groningen |
| Bringly B.V. | |
| Brink | South Holland |
| Brinkman.IT | Groningen |
| Broadcast Partners | |
| Brooklyn Venture | Utrecht |
| Brosis.nl | Overijssel |
| Brother International (Nederland) B.V. | North Holland |
| Brthrs Agency | |
| Brxs B.V. | |
| BS Phonefix | |
| Bset Media | |
| BSU Groep B.V. | North Brabant |
| Bttn | |
| BUBTY | South Holland |
| Buckaroo B.V. | Utrecht |
| Buddy Payment B.V. | |
| Budget Computers | South Holland |
| BudgeTronics | North Holland |
| Budgetwebhosting.nl | North Holland |
| Bugloos B.V. | |
| Builders | |