| Q-ray | Drenthe |
| Q-Tech B.V. | |
| Q42 | South Holland |
| QA Systems GmbH | North Holland |
| Qblox | |
| QBS group | Utrecht |
| Qconferencing | North Holland |
| QDC Internetservices | South Holland |
| QDI Systems | Groningen |
| Qexpertise | Utrecht |
| QISS IT | |
| Qlikchain International B.V. | South Holland |
| QNP ICT & Telecom Profesionals | North Brabant |
| Qoncord | North Holland |
| Qone Internet Services | North Holland |
| QphoX B.V. | |
| Qpinch B.V. | |
| Qrcus | Limburg |
| Qsite.com B.V. | Flevoland |
| Quad Team | North Brabant |
| Quadient | Flevoland |
| Quadira B.V. | |
| Qualinx B.V. | |
| Quality Networks | |
| Quality Positioning Services B.V. | Utrecht |
| Quality Support B.V. | Gelderland |
| Quality Systems B.V. | Utrecht |
| Qualogy | South Holland |
| Quantaris | Utrecht |
| Quantib B.V. | |
| Quantoz N.V. | Utrecht |
| Quantum Delta NL | |
| Quantum for Business | |
| Quantum Inspire | South Holland |
| Quantum Network Explorer | South Holland |
| Quantum.Amsterdam | North Holland |
| QuantWare | |
| QuantWare | |
| Quanza Engineering | North Holland |
| Quaras Software | North Holland |
| Quartess | Gelderland |
| QUBE ICT Solutions B.V. | North Holland |
| Quint | North Holland |
| Quintor | Utrecht |
| Quipment | Gelderland |
| Quirem Medical B.V. | |
| QuiX Quantum B.V. | |
| QuTech | South Holland |
| Qware ICT | |
| Qweb Internet Services B.V. | South Holland |