| B. Braun Melsungen AG | |
| b.i.t. Beratungsgesellschaft für Informations-Technologie mbH | Hesse |
| b.itmap digital services GmbH | North Rhine-Westphalia |
| B.O.S. Software Service und Vertrieb GmbH | Bavaria |
| B.S.O. 2001 Software und CAD Engineering GmbH | Baden-Württemberg |
| b.telligent GmbH & Co. KG | Bavaria |
| b.unique Mediendesign | Rhineland-Palatinate |
| B1 Systems GmbH | Bavaria |
| b1.ai GmbH | |
| b10 | Berlin |
| B2 Software GmbH | North Rhine-Westphalia |
| BA4V Fondsmanagement GmbH | North Rhine-Westphalia |
| Baade M2M-Solutions GmbH | |
| BAB Technologie GmbH | North Rhine-Westphalia |
| Babbel GmbH | |
| Babiel GmbH | North Rhine-Westphalia |
| BABLE GmbH | |
| Babtec | North Rhine-Westphalia |
| BaBuCo | Bavaria |
| BACE GmbH | |
| Bachert Datentechnik GmbH | Hesse |
| Bachinger Software | Bavaria |
| Backauf Computer GmbH | Schleswig-Holstein |
| BACKCLICK GmbH | Lower Saxony |
| BACKEND Postproduction | |
| BacklinkGPT | |
| Backnet Entwicklungs- & Support GmbH | |
| Backup2Net | Hesse |
| BadenIT GmbH | Baden-Württemberg |
| Badenova AG & Co. KG | |
| badenovaNETZE GmbH | |
| BAG Diagnostics GmbH | |
| BAG Health Care GmbH | |
| BAGHUS GmbH | Bavaria |
| baito UG (haftungsbeschränkt) | Berlin |
| baj.de GmbH | North Rhine-Westphalia |
| Bajorat Media | Berlin |
| Bakara Software und Beratungs GmbH | Hesse |
| bakdata GmbH | |
| Bakonyi Technologies GmbH | Bavaria |
| Balance Re AG | |
| Balanced Code GmbH | Rhineland-Palatinate |
| Balesio AG | Baden-Württemberg |
| Baltic-Akustik GmbH | Hesse |
| BamseNet GbR | Saxony |
| Bananapie GmbH | |
| Bancon GmbH | |
| Bank Elektronik - Intelligent Controls GmbH | Hesse |
| Bank-Media GmbH | |
| Banken Software BS GmbH | Rhineland-Palatinate |