| AKI Power Systems GmbH | Hesse |
| Akii | |
| Akitogo | Hesse |
| Akkon Hochschule für Humanwissenschaften | |
| Akktor GmbH | Berlin |
| Aklamio | |
| AKos Consulting & Solutions Deutschland GmbH | Baden-Württemberg |
| Akosim GmbH | Hamburg |
| Akquinet AG | Hamburg |
| AKRYL digital consulting | Hamburg |
| Akteneinlagerung Weilhammer GmbH | Hesse |
| AKTIF Technology GmbH | Brandenburg |
| Aktiv-Kabel GmbH | Berlin |
| Aktivbank AG | Hesse |
| aktivweb System- und Datentechnik GmbH | Bavaria |
| AKTS S.A. | Baden-Württemberg |
| Aktualisierer Internet GmbH | Bavaria |
| Al Engineering AG | Saarland |
| ALAC Software GmbH | North Rhine-Westphalia |
| Alacris Theranostics GmbH | |
| Alaiko GmbH | |
| Alan Electronics GmbH | Hesse |
| Aland Cloud GmbH | |
| Alasco GmbH | Bavaria |
| Alasco GmbH | |
| Alaska Software Inc. | Hesse |
| AlbamSoft | North Rhine-Westphalia |
| Albega Medical GmbH | |
| Albert-Ludwigs-Universität Freiburg - Freiburg Center for Data Analysis and Modeling | Baden-Württemberg |
| Albert-Ludwigs-Universität Freiburg - Mathematisches Institut | Baden-Württemberg |
| albis-elcon system Germany GmbH | Saxony |
| Albrecht Elektronik | Bavaria |
| Albrecht Jung GmbH & Co. KG | North Rhine-Westphalia |
| Alcan Systems GmbH i.L. | |
| Alcatech | Saxony |
| alcemy GmbH | |
| Aldebaran Robotics | |
| Aleia Holding AG | |
| alemo kommunikations GmbH | Hamburg |
| Aleph Alpha GmbH | |
| Aleph Alpha GmbH | |
| Aleph Engineering GmbH | |
| Alexa Hackathon | North Rhine-Westphalia |
| Alexander Franzkowiak | Baden-Württemberg |
| Alexander Zotz | North Rhine-Westphalia |
| Alexander´s Webdesign | Lower Saxony |
| alfa Media Partner GmbH | Hesse |
| AlfaDocs GmbH | |
| Alfahosting GmbH | Saxony-Anhalt |
| alfatec GmbH & Co. KG | Bavaria |