| BeKa-Software GmbH | |
| Belichberg GmbH | |
| Beratung für IT, Zeiterfassung & BDE | Salzburg |
| berghWerk New Media | Vienna |
| Bergmann engineering & consulting GmbH | Vienna |
| Bernecker + Rainer Industrie Elektronik Ges.m.b.H. | Upper Austria |
| BestSolution.at | Tyrol |
| BetterTogether | |
| BHS Datensysteme GmbH | Salzburg |
| Big Cheese Ventures GmbH | |
| Bimspot | Vienna |
| Biocrates Life Sciences AG | |
| Biomay AG | |
| Biome Diagnostics | |
| Biometrix | Vienna |
| Bit-Studio GmbH | |
| Bitcoin Austria | |
| Bitlab Technology GmbH | |
| Bitpanda GmbH | |
| BitXtreme | Vienna |
| biz4you Kircher & Klehr OG | Vienna |
| BJB-media Webdesign | Styria |
| Blackmirror Media | |
| Blackshark.ai GmbH | |
| Blockpit AG | |
| Blockserv Blockchain Services e.U. | |
| Blockshake GmbH | |
| Blue Banana Software | Styria |
| Blue Planet Ecosystems GmbH | |
| Bluechip Software GmbH | Salzburg |
| BlueSky Immunotherapies GmbH | |
| Bluetech Systems Barcodesysteme GmbH | Vienna |
| BlueVisionTec e.U. | Styria |
| BMD Systemhaus Ges.m.b.H. | Upper Austria |
| Böck & Partner KG | |
| Bongfish GmbH | Styria |
| bonit.at Software OG | Lower Austria |
| Bonrepublic GmbH | |
| Bookamat OG | Vienna |
| Boom Software AG | Styria |
| bplaced | Vienna |
| Brainhero GmbH | |
| Brandauer IT-Services | Tyrol |
| Brandl Talos | |
| breathe ilo GmbH | |
| Bright IT GmbH | Tyrol |
| Bright Red Systems GmbH | |
| Broken Rules Interactive Media GmbH | Vienna |
| Brunner Webhosting | Upper Austria |
| Brutkasten Media GmbH | |