| bankingSoftwareLabs GmbH | North Rhine-Westphalia |
| BANKSapi Technology GmbH | Bavaria |
| Banxware GmbH | Berlin |
| Bao Solutions GmbH | |
| BÄR Automation GmbH | |
| Baramundi Software AG | Bavaria |
| BARC GmbH | |
| Bard College Berlin | |
| Bareos GmbH & Co. KG | |
| Barketing IMS GmbH | Berlin |
| Baro Pfannenstein | |
| Barracuda Digitale Agentur GmbH | North Rhine-Westphalia |
| Bartec Sicherheits-Schaltanlagen GmbH | Baden-Württemberg |
| Bartels Media GmbH | Rhineland-Palatinate |
| Barth Elektronik GmbH | Lower Saxony |
| Barthauder Software | Lower Saxony |
| Barzahlen | |
| base iX | Baden-Württemberg |
| Base Templates | |
| base4IT | Rhineland-Palatinate |
| Baseclick GmbH | |
| basecom GmbH & Co. KG | |
| based on IT GmbH | |
| Basename Internetlösungen | Saarland |
| Baseplus DIGITAL MEDIA GmbH | |
| BaseX | Baden-Württemberg |
| BASIC Thinking GmbH | Berlin |
| BASICS09 GbR | |
| BASIS 1 Softwarevertriebs-GmbH | Bavaria |
| BASIS GmbH Wismar | Mecklenburg-Vorpommern |
| Basis Systeme netzwerk | Bavaria |
| Basislager Coworking | |
| Bassen Electronic GmbH | Lower Saxony |
| Basspage Mediadesign | Berlin |
| Bastian Allgeier | |
| Basys GmbH | Lower Saxony |
| basysKom GmbH | Hesse |
| BATOP GmbH | Thuringia |
| Bauakademie Gesellschaft für Forschung, Entwicklung und Bildung mbH | Berlin |
| Baubauwerk | |
| Bauer + Kirch GmbH | Hesse |
| Bauer Daten-Systeme GmbH | Baden-Württemberg |
| Bauer Informationssysteme GmbH | Hesse |
| Bauer Martin | Bavaria |
| Bauer Media Group | |
| bauer+bauer webdesign | Bavaria |
| BauerSoftware | Hesse |
| Baufi24 | |
| Bauhaus-Universität Weimar | |
| Bauknecht Softfolio.edv GmbH | |