| Andrews IT Engineering Kft. | Budapest |
| Answare Kft. | Budapest |
| AP4 Digital | |
| ApertusVR | |
| Apor Vilmos Katolikus Főiskola | |
| AppCorner Kft. | |
| ApPello | |
| Appercell Biotech Kft. | |
| Appsters | |
| Apter Technologies Ltd | |
| Arcanum Adatbázis Kft. | |
| Areus Infokommunikációs Zrt. | Budapest |
| ArgonSoft Informatikai Szolgáltató Kft. | |
| Arrow ECS Kft. | |
| Artamax Creative Solutions | Budapest |
| Arteries | |
| Artsoft Hungary Kft. | |
| ARworks | |
| ASBIS Magyarország Kft. | Budapest |
| ASPnet.hu | Budapest |
| Assister | |
| Asura Technologies Ltd | |
| Asyst Solutions Zrt. | Budapest |
| AteDin | |
| ATL Kft. | Pest |
| Atoll Technologies | Budapest |
| Attrecto Zrt. | |
| ATW Internet Kft. | Budapest |
| Audio Partner Kft. | |
| Automizy | |
| Autosoft | Budapest |
| AutSoft Zrt. | |
| Avatao | |
| Aventail Szolgáltató és Informatikai Tanácsadó Kft. | |
| Avian Systems | |
| Avicenna International College | |
| Avicor Biotech | |
| AWEX Multimedia | Budapest |
| AXEL Professional Softwares Kft. | Bács-Kiskun |
| Axico Informatikai Kft. | Budapest |
| AxisVM | Budapest |
| Axon Digital Ltd | |
| Babilon Informatika Kft. | Budapest |
| Baconsult Kft. | |
| Balasys | |
| BAOBAB Coworking Oasis | |
| Barion Payment, Inc. | |
| BaSys | |
| BauApp Kft. | |
| Bay Zoltán Alkalmazott Kutatási Közhasznú Nonprofit Kft. | |