| Busold Consulting GmbH | |
| BusyBytes GmbH | Baden-Württemberg |
| Butterweck IT | North Rhine-Westphalia |
| BuxSoft | Bavaria |
| Buyomics GmbH | |
| Buzzwho! GmbH & Co. KG | Baden-Württemberg |
| BVASystem | Berlin |
| BVD Datenverarbeitung GmbH & Co. KG | North Rhine-Westphalia |
| BVG Communication Technologies GmbH | |
| BW Bartel Webdesign Hannover | Lower Saxony |
| BwConsulting GmbH | |
| BWI Informationstechnik GmbH | North Rhine-Westphalia |
| BWK Systemhaus GmbH | Saxony |
| BWSolution GmbH | |
| BWZ Elektronik Vertrieb GmbH | Hamburg |
| BxW Agency | |
| Bynd GmbH | Bavaria |
| Byte Connect GmbH | |
| Byte my Eye GbR | Thuringia |
| byte5 GmbH | |
| ByteAction GmbH | Hesse |
| Bytebetrieb GmbH & Co. KG | |
| BYTEC Bodry Technology GmbH | Baden-Württemberg |
| Bytecamp GmbH | Brandenburg |
| bytecity UG | North Rhine-Westphalia |
| Bytecount | |
| Bytekonzept GmbH | Lower Saxony |
| Bytemine GmbH | Lower Saxony |
| Bytepark GmbH | |
| Byteplant GmbH | Bavaria |
| ByteRider GmbH | Bavaria |
| byterunner GmbH & Co. KG | |
| Bytonic Software | Saxony |
| BZ.medien Digital GmbH | |
| Bzdega GmbH | North Rhine-Westphalia |
| C&P Capeletti & Perl Gesellschaft für Datentechnik mbH | Hamburg |
| C+ITEC AG | Bavaria |
| C-Base e.V. | Berlin |
| C-House Marketing GmbH | Rhineland-Palatinate |
| C-Informationssysteme GmbH | Saxony |
| C-Inspector | North Rhine-Westphalia |
| c-LEcta GmbH | |
| c-line Mediensysteme GmbH | Bavaria |
| C-MAX Time Solutions GmbH | Baden-Württemberg |
| C-P-S Computer-Peripheral-Services | |
| C-Partner Systemhaus GmbH | Thuringia |
| C-Rent | North Rhine-Westphalia |
| c-software | Baden-Württemberg |
| C-Technik Software GmbH | Baden-Württemberg |
| C-XL | Bavaria |