| Alconet, s.r.o. | |
| ALEF Distribution SK | |
| AlejTech, spol. s r.o. | Bratislava |
| Alfa Reklama, s.r.o. | |
| alfaBASE, s.r.o. | |
| Alfasat, s.r.o. | |
| ALISON Slovakia, s.r.o. | |
| Aliter Technologies | Bratislava |
| All4Net, s.r.o. | Bratislava |
| AllWeb, s.r.o. | Nitra |
| Altamira | |
| Altamira Technologies, a.s. | |
| Alternet, s.r.o. | Košice |
| Alto Slovakia, s.r.o. | Bratislava |
| AMD plus, s.r.o. | |
| AMI Plus, s.r.o. | Prešov |
| AMICOMP BB, s.r.o. | Banská Bystrica |
| Amset, s.r.o. | |
| An systems.sk, s.r.o. | |
| AnalyticaDesign | |
| Anasoft APR, s.r.o. | Bratislava |
| Aner Haus, s.r.o. | |
| ANTIK Technology | |
| ANTIK Telecom, s.r.o. | Košice |
| Apirox, s.r.o. | Prešov |
| APIS | Banská Bystrica |
| APIS, spol. s.r.o. | Banská Bystrica |
| Applied Precision Ltd | Bratislava |
| Aproks, spol. s r.o. | |
| Ardaco, a.s. | Bratislava |
| Argenio, s.r.o. | Bratislava |
| Arkos, spol. s r.o. | |
| Armstrong Competence Consulting | |
| Arnet, s.r.o. | Žilina |
| Ars Nova, s.r.o. | Bratislava |
| Art4web | Trenčín |
| ASIX, s.r.o. | Žilina |
| ASNET | |
| Astarta | |
| Aston ITM | Bratislava |
| ATAK systems, s.r.o. | Žilina |
| Au Media, s.r.o. | Prešov |
| Auto Mute | |
| AutoCom, s.r.o. | |
| Automatica | |
| Avenis Pro, s.r.o. | Trenčín |
| AVVIS, spol. s r.o. | Nitra |
| Aweb.sk | Bratislava |
| Axalnet, s.r.o. | |
| AXASOFT, a.s. | |