| q1q Telematic GmbH | Bavaria |
| Q4U GmbH | North Rhine-Westphalia |
| QAware GmbH | |
| QC Design | |
| QC-Quality Control GmbH | |
| Qdrant | |
| QDT GmbH & Co. KG | |
| QF-Test | Bavaria |
| qhconsulting.de | |
| Qiagen | |
| Qimia GmbH | North Rhine-Westphalia |
| Qint Software GmbH | Bavaria |
| Qira | |
| Qiskit Hackathon at World of QUANTUM | |
| QL-IT Lösungen GmbH | Bremen |
| QLi5 Therapeutics GmbH | |
| qlworx | Berlin |
| Qnetics GmbH | |
| Qomboo - IT Consulting | North Rhine-Westphalia |
| QooXdoo | Baden-Württemberg |
| Qosmotec GmbH | North Rhine-Westphalia |
| QPLIX GmbH | |
| QPM Quality Personnel Management GmbH | |
| QR GmbH | Lower Saxony |
| QRCode-Generator.de | North Rhine-Westphalia |
| QRSKIN GmbH | |
| Qruise GmbH | |
| QS QualitySoft GmbH | Hamburg |
| qSkills GmbH & Co. KG | Bavaria |
| QT software GmbH | North Rhine-Westphalia |
| QTIS GmbH | North Rhine-Westphalia |
| QUAD GmbH | North Rhine-Westphalia |
| Quadecco | |
| Quadress GmbH | North Rhine-Westphalia |
| Quadriga Media Berlin GmbH | |
| Quadro-Computer | Baden-Württemberg |
| Quadrosoft GmbH | Saxony-Anhalt |
| Qualifyze GmbH | |
| Quality Match GmbH | |
| QualityHosting AG | |
| Qualitype AG | Saxony |
| QualitySoft | |
| QUANCOM Informationssysteme GmbH | North Rhine-Westphalia |
| Quandoo GmbH | |
| QUANT Electronic GmbH | Bavaria |
| Quant IP GmbH | |
| QuanTag IT Solutions GmbH | Bavaria |
| Quantagonia | |
| QUANTIC Digital GmbH | Saxony |
| QuantiCor Security GmbH | |