| Boccalu | |
| BoCoM Vertrieb und Service GmbH | Schleswig-Holstein |
| Bodensee Medien | Baden-Württemberg |
| Bodenso | Baden-Württemberg |
| Boehringer Ingelheim International GmbH | |
| Boehringer Ingelheim Venture Fund | Rhineland-Palatinate |
| BOG Copiersysteme GmbH | |
| Bogan Kassen und System GmbH | Lower Saxony |
| BOGEN Magnetics GmbH | |
| Boger Electonics GmbH | |
| Boglex Global Enterprises | |
| Böhme & Weihs Systemtechnik GmbH & Co. KG | North Rhine-Westphalia |
| Bohnline Medienservice GbR | Baden-Württemberg |
| Boin GmbH | Baden-Württemberg |
| Boinx Software Ltd | Bavaria |
| BOK+ Gärtner GmbH | |
| BOLD & EPIC Code GmbH | |
| Bold & Epic Transform | |
| Boldheart GmbH | |
| Boll und Partner Software GmbH | Hesse |
| Bolt Ventures GmbH | |
| Bome Software | Bavaria |
| Bonanza Design | |
| Bonanza Software GmbH | |
| bond Software-Entwicklung GmbH | Saarland |
| bonify | Berlin |
| BONN Elektronik GmbH | Bavaria |
| Bonn International Centre for Conflict Studies gGmbH | |
| Bonner Linux Users Group | North Rhine-Westphalia |
| Bonnie & Byte Berlin GmbH | |
| Bookhit-GmbH | North Rhine-Westphalia |
| BookingData IO GmbH | |
| Bookingkit GmbH | |
| Boost Internet GmbH | |
| Booster Therapeutics GmbH | |
| BOOT - Best of Open Technologies e.V. | Hamburg |
| Boot-US | Baden-Württemberg |
| Bootify | |
| BOPLA Gehäuse Systeme GmbH | North Rhine-Westphalia |
| Bor!sgloger Consulting GmbH | Baden-Württemberg |
| Bora Computer GbR | North Rhine-Westphalia |
| Boreus GmbH | Mecklenburg-Vorpommern |
| BORGWARE GmbH | Baden-Württemberg |
| Borlabs GmbH | |
| Borm Informatik GmbH | North Rhine-Westphalia |
| Born | |
| born2web | North Rhine-Westphalia |
| Bornholdt Lee GmbH | |
| Börsig GmbH | Baden-Württemberg |
| Borucinski Grafix | Hesse |