| BBH Systems GmbH | Rhineland-Palatinate |
| BBK Automations- und Software GmbH | Hesse |
| BBS Automation GmbH | |
| BBS Bild- und Lichtsysteme GmbH | Bavaria |
| BBS Büromaschinenservice Berlin GmbH | Berlin |
| BBV-Computer-Dienst GmbH | Bavaria |
| bbw Hochschule | |
| BC Büromaschinen Center Christian Brade e.K. | Hesse |
| bc.lab Agentur für Online Relations GmbH | Hamburg |
| BCC Unternehmensberatung GmbH | Hesse |
| BCE-Elektronik - Wilfried Eggl und Frank Büker GbR | North Rhine-Westphalia |
| bci - Gesellschaft für Identtechnik und Datenkommunikation mbH | Lower Saxony |
| BCS-Linke GmbH | Schleswig-Holstein |
| BCT Technology AG | Baden-Württemberg |
| BD4 Group GmbH i.L. | |
| BDH-Klinik Braunfels gGmbH | |
| BDL GmbH & Co. KG | Hesse |
| BDT Media Automation GmbH | Baden-Württemberg |
| BE-terna GmbH | Saxony |
| Beagle Systems GmbH | |
| BEAK Electronic Engineering | Thuringia |
| Beam GmbH | |
| BeamNG GmbH | |
| BeamYourScreen GmbH | Bavaria |
| Beans Software GmbH | |
| BEATRONIC Telekommunikation Industrievertretungen e.K. | Baden-Württemberg |
| Beatvest | |
| Bebro Electronic GmbH | Baden-Württemberg |
| bec kommunal Software GmbH | Bavaria |
| Because Software AG | Bavaria |
| Bechmann GmbH | Bavaria |
| Bechtle AG | Baden-Württemberg |
| Bechtle-Comsoft GmbH | |
| BECK GmbH & Co. Elektronik Bauelemente KG | Bavaria |
| Beck IPC GmbH | Hesse |
| Beckdahl Bahn GmbH | North Rhine-Westphalia |
| Beckdesign GmbH | North Rhine-Westphalia |
| Becker EDV-Beratung GmbH & Co. KG | Saarland |
| Becker Software Support | Hesse |
| Beckmann & Partner Consult GmbH | Hesse |
| Beckmann Elektronik GmbH | Bavaria |
| becom Systemhaus GmbH & Co. KG | Hesse |
| Bedinetz GmbH | Brandenburg |
| Beducated GmbH | |
| Bee Smart City | |
| BEE.GmbH | North Rhine-Westphalia |
| BEEHIVE Coworking | |
| Beelinguapp | |
| Beepworld | North Rhine-Westphalia |
| Beer Telekommunikation e.K. | Saxony |