| BFK edv-consulting GmbH | Baden-Württemberg |
| BFP-Q Management GmbH | |
| BG Klinikum Unfallkrankenhaus Berlin gGmbH | |
| BG-Phoenics GmbH | Lower Saxony |
| bgp e.media GmbH | North Rhine-Westphalia |
| BHO Legal | |
| BHS.Solutions | |
| bhv Publishing GmbH | North Rhine-Westphalia |
| BI Business Intelligence GmbH | Saxony |
| BIB GmbH | Baden-Württemberg |
| bib International College | |
| BibSonomy | |
| bicomfor | North Rhine-Westphalia |
| Bidpath GmbH | |
| Bieber-IT GbR | Bavaria |
| Biedermann Motech GmbH & Co. KG | |
| Bieniek & Partner IT Group | North Rhine-Westphalia |
| Bierbörsensystemen | Schleswig-Holstein |
| Bierwirth & Gabele SoftwareDesign GbR | Hesse |
| Big Data Blog | Bavaria |
| Big Picture GmbH | |
| Big-xyt AG | |
| BigChainDB GmbH | Berlin |
| BiggePC GbR | North Rhine-Westphalia |
| BigMammut | Baden-Württemberg |
| BigMammut.net | Baden-Württemberg |
| Bigpoint GmbH | Hamburg |
| BIK Computer GmbH | Bavaria |
| BIKONET | North Rhine-Westphalia |
| Bikotronic-Industrie-Elektronik GmbH | Rhineland-Palatinate |
| Bild- und Textwerkstatt | Baden-Württemberg |
| Bildbau AG | Berlin |
| BilderLoad | Rhineland-Palatinate |
| Bildhuus GmbH | |
| Bildungsinitiative der Netzwerk Industrie | Baden-Württemberg |
| Bilendo GmbH | |
| BIlger.media | Baden-Württemberg |
| Bilgi Interface GmbH | Berlin |
| Billie GmbH | Berlin |
| Billing Components GmbH | Bavaria |
| Billiton Internet Services GmbH | North Rhine-Westphalia |
| Billomat | |
| Billwerk GmbH | |
| Biloba IT Balleyer & Lohrmann GbR | Baden-Württemberg |
| Bimex Elektronikbauteile GmbH | Hesse |
| BIMsystems GmbH | |
| Binaris informatik GmbH | |
| Binary Code Barn | |
| binary stars GmbH | |
| Binder & Geck EDV-Service GbR | Bavaria |