| BIZTEAM Systemhaus GmbH | Bavaria |
| Björn Heumann, Dipl.-Ing. (FH) | Hesse |
| Björn Wibben | North Rhine-Westphalia |
| BKL Electronic Kreimendahl GmbH | North Rhine-Westphalia |
| BKS Kassensysteme GmbH | Bavaria |
| Black Box Deutschland GmbH | Bavaria |
| Black Cat Web Design | Baden-Württemberg |
| Black Forest Games GmbH | |
| Black Forest Labs | |
| Black Pants Game Studio | Hesse |
| Black Semiconductor | |
| Blackbit digital Commerce GmbH | |
| Blackbit digital Commerce GmbH | |
| Blackcam 4D GmbH | |
| Blackemon Büro für Mediengestaltung | Rhineland-Palatinate |
| blaich IT GmbH | |
| Blank | Bavaria |
| Blank & Nassauer GmbH | |
| Blauhut & Partner Informationssysteme GmbH | Bavaria |
| BlauWeb.DE | Brandenburg |
| Blech GmbH | Berlin |
| Blecher Networld GmbH | Bavaria |
| Blended.io | |
| blendFX | |
| Blenk Software | Bavaria |
| blic-voraus | |
| Blickfeld GmbH | Bavaria |
| BLICKFELD Retail Services GmbH | |
| Blickle & Scherer Kommunikationstechnik GmbH & Co. KG | Baden-Württemberg |
| Blickshift GmbH | |
| Blindside HB GmbH | |
| blinkenbox eG | |
| Blinkenlichten Open Source Solutions | Berlin |
| BlinkIn GmbH | |
| Blinkist | |
| Blish GmbH | |
| bll computersysteme GmbH & Co. KG | Baden-Württemberg |
| Blloc GmbH | |
| BLMEDiA GmbH | North Rhine-Westphalia |
| Blockbrain GmbH | |
| Blockchain Hackathon | Baden-Württemberg |
| Blockchain Helix AG | Hesse |
| Blockchain Holding GmbH | |
| Blockchain Research Lab gGmbH | |
| blockLAB Stuttgart e.V. | |
| Blockrocket GmbH | |
| Blocksize | |
| Blocksize Capital | |
| Blockwall Management GmbH | Hesse |
| Blockwall Management GmbH | |