| Agentur zur schönen Gärtnerin GmbH | Bavaria |
| AgenturWebfox GmbH | Berlin |
| agex IT GmbH | |
| AGFEO GmbH & Co. KG | North Rhine-Westphalia |
| Agil Software GmbH | Baden-Württemberg |
| Agile Partners GmbH | |
| Agile Robots AG | Bavaria |
| Agile42 Consulting GmbH | |
| agilTech Information Technologies GmbH | |
| AGIQON GmbH | |
| Agnitas AG | Bavaria |
| Agorum Software GmbH | Baden-Württemberg |
| AgreeDo | Bavaria |
| Agricomm | Baden-Württemberg |
| Agrident GmbH | Lower Saxony |
| Agro Drisa GmbH | Saxony |
| AgroData | |
| Agroproject Technologie und Informationssysteme GmbH & Co. KG | North Rhine-Westphalia |
| AGS Automation Greifsysteme Schwope GmbH | |
| AHB Electronic GmbH | Baden-Württemberg |
| ahd GmbH & Co. KG | North Rhine-Westphalia |
| Ahead Solutions GmbH | |
| ahhh kah! | Hesse |
| Ahoy Berlin GmbH | |
| AHP Gesellschaft für Informationsverarbeitung mbH | Schleswig-Holstein |
| Ahrens | iT-Service | Lower Saxony |
| AHS GmbH Banksysteme | Baden-Württemberg |
| AI Antwort:Internet GmbH | |
| AI Prompt Randomizer | |
| AI Superior GmbH | |
| ai-coustics UG (haftungsbeschränkt) | |
| AI-Omatic Solutions GmbH | |
| Aibase Creative Software | Brandenburg |
| Aicas GmbH | Baden-Württemberg |
| AiCOMM Online Solutions GmbH | Bavaria |
| Aiconix | Hamburg |
| AICURA medical GmbH | |
| AiCuris Anti-infective Cures AG | |
| AidaForm | |
| AIDESIGNER media GmbH | Mecklenburg-Vorpommern |
| AIDeX GmbH | North Rhine-Westphalia |
| Aidoo Software GmbH | North Rhine-Westphalia |
| AIF Capital GmbH | |
| Aifinyo AG | |
| Aifora | |
| Aifotec AG | Thuringia |
| AIGES oHG | North Rhine-Westphalia |
| Aigner iT solutions - Simon Aigner | Bavaria |
| AIgnostics GmbH | |
| Aignostics GmbH | |