| Argentina Global Virtual | Buenos Aires |
| Argentina Virtual | Buenos Aires |
| Argentina-Hosting.Com | Santa Fe |
| Argentina.com | Buenos Aires |
| ARGENTINAHOST | Santa Fe |
| Argin Marketing Digital | Buenos Aires |
| Arnet | Buenos Aires |
| Around | |
| Arsat | |
| ArsUltra | |
| Artcon Design | Buenos Aires |
| Artech S.R.L. | Buenos Aires |
| Artech Servicio Tecnico | Buenos Aires |
| Artware | Buenos Aires |
| Aryem Automatizaciones | Buenos Aires |
| Arzion S.R.L. | Buenos Aires |
| Asesores Informaticos | Buenos Aires |
| Asociación de Desarrolladores de Videojuegos Argentina | Buenos Aires |
| Asociación de Emprendedores de Argentina | Buenos Aires |
| Asociación de Redes de Interconexión Universitaria | |
| Assert Solutions | |
| ATCI, S.A.S. | Buenos Aires |
| ATN Comunicaciones & Sistemas | Buenos Aires |
| Autologica, S.A. | Santa Fe |
| AUTOSoft y Asoc | Buenos Aires |
| AutoSolve | |
| Auxitec | Buenos Aires |
| AVaTAR MedTech | |
| Avatec | Buenos Aires |
| AVG Antivirus Latinoaméricana | Buenos Aires |
| AVR Audio Visual Rental & Sales | Buenos Aires |
| Avra Dev | |
| AXA Computación | Buenos Aires |
| Axent Studio | Buenos Aires |
| Axioma IT Solutions, S.R.L. | |
| Axsoft Argentina S.A. | Buenos Aires |
| Axter | Buenos Aires |
| Axton IT | Buenos Aires |
| AYIGROUP | |
| AyP Hotelera | Buenos Aires |
| Ayres IT | Buenos Aires |
| AZP | Buenos Aires |
| Azur Desarrollos | Buenos Aires |
| BACP | |
| BAEHOST | Buenos Aires |
| BairesHost | Buenos Aires |
| Banana Software | |
| Bantics Cooperativa, Ltda | |
| BAPS | Buenos Aires |
| Barco Design Studio | |