| Builders en Performers | Flevoland |
| Bumicom Telecom B.V. | South Holland |
| Bunq | North Holland |
| Bureau Bright | Gelderland |
| Bureau Veritas | North Holland |
| Bureau Zigzag | Gelderland |
| Burk Consulting NL B.V. | |
| Buro voor Organisatie & Ontwikkeling | North Brabant |
| Business Angels Netwerken Nederland | North Holland |
| Business Hosting | Overijssel |
| Business IT Rent | Drenthe |
| Business School Netherlands | |
| Business to You B.V. | Utrecht |
| BusinessBase B.V. | Utrecht |
| Busy Studio | |
| BUX B.V. | North Holland |
| Buyitdirect | North Holland |
| BVB Media B.V. | North Brabant |
| ByeleX | North Brabant |
| Bynder | North Holland |
| Byondis | Gelderland |
| Bys Hosting | |
| BySky B.V. | Drenthe |
| BytePark | |
| Bytesnet | |
| C Teleport | |
| C# Coding Guidelines | |
| C-DEVICE | North Holland |
| C-Track Benelux B.V. | South Holland |
| C.A.T. Automatisering B.V. | North Brabant |
| C.N. Rood B.V. | South Holland |
| C4 Software | North Brabant |
| CAB Holland B.V. | South Holland |
| Cablescan Ltd | Flevoland |
| CACI B.V. | North Holland |
| CAD Accent B.V. | North Brabant |
| CAD Factory | South Holland |
| CAD Services | Utrecht |
| CAD2M B.V. | Gelderland |
| Cadac Group | Limburg |
| CADdesign | North Brabant |
| Cadix | Utrecht |
| CADkoop | North Brabant |
| Cadmes | North Brabant |
| Caelus Health | North Holland |
| Cafeetje | North Holland |
| Caiway | South Holland |
| Calago | Drenthe |
| Caliber | |
| Callvoip | Groningen |