| BOS Gesellschaft für EDV-Beratung + Organisation + Software mbH | Rhineland-Palatinate |
| Bosch Mobility | |
| Bosch Rexroth AG | Bavaria |
| Bosch Semiconductors for Automotive | |
| Bosch Sensortec GmbH | |
| Bosch Sicherheitssysteme GmbH | Baden-Württemberg |
| Bosch.IO GmbH | |
| Bosenet | Berlin |
| Bosnar GmbH | |
| Botcamp.ai | |
| BoTech-EDV | Hesse |
| BOTfriends GmbH | |
| Botoni | North Rhine-Westphalia |
| botspot AG | |
| BotWorld | |
| böwa GmbH | Bremen |
| BÖWE SYSTEC GmbH | Bavaria |
| BOXIT LabSoftware | Berlin |
| Bp Event by Bankettprofi GmbH | Rhineland-Palatinate |
| BPI Solutions GmbH & Co. KG | North Rhine-Westphalia |
| bps Software GmbH & Co. KG | North Rhine-Westphalia |
| Bracht EDV Handelsvertretung e.K. | North Rhine-Westphalia |
| BraDaTec | North Rhine-Westphalia |
| Bradler & Krantz GmbH & Co. KG | North Rhine-Westphalia |
| Bragi GmbH | |
| BRAIN Biotech AG | |
| Brainbot Technologies AG | Rhineland-Palatinate |
| Brainlab AG | Bavaria |
| Brainloop AG | Bavaria |
| BrainRepair UG (haftungsbeschränkt) | |
| Brainsap GmbH | |
| BrainStation Software | Rhineland-Palatinate |
| BrainsToVentures AG | Berlin |
| Braintool Software GmbH | Baden-Württemberg |
| Braintower Technologies GmbH | Saarland |
| BrainTrade Gesellschaft für Börsensysteme mbH | |
| Braintronic Software GmbH | Brandenburg |
| Brainware Systems Gesellschaft für EDV und Franchise mbH | Schleswig-Holstein |
| Brainworxx GmbH | Lower Saxony |
| Brakensiek Systemhaus GmbH & Co. KG | North Rhine-Westphalia |
| BRAND GmbH & Co. KG | |
| Brand Science Institute GmbH & Co. KG | |
| Brand University of Applied Sciences | |
| Brand-Concept | Berlin |
| Brandback | |
| Brandbeschleuniger.net | North Rhine-Westphalia |
| brandcom GmbH | |
| Branded E-Commerce Holding GmbH | |
| Brandeis Digital GmbH | |
| Brandenburger Linux User Group | Brandenburg |