| Red Cooperativa de Comunicaciones | Buenos Aires |
| Red Net Argentina | Buenos Aires |
| Red Plataforma | Buenos Aires |
| Redmedia Estudio | Buenos Aires |
| Rednodo | Buenos Aires |
| Redógena | Buenos Aires |
| Redy | Córdoba |
| RedyNet | Buenos Aires |
| Reed Computers | Buenos Aires |
| Refillkit | Buenos Aires |
| Relational Solutions | Buenos Aires |
| Rendoro | Buenos Aires |
| RentaControl | Buenos Aires |
| Reserv IT Solutions | Buenos Aires |
| RetroNet | Buenos Aires |
| Retys | Buenos Aires |
| RHI Soluciones Informaticos | Buenos Aires |
| RL System Designer | Santa Fe |
| RNB Diseno Web y Grafico | Buenos Aires |
| Rodrigo Calvo | Buenos Aires |
| Rotsis Integra | Buenos Aires |
| Rubicon | Buenos Aires |
| RufinoWeb | Buenos Aires |
| Rumble S.R.L. | Buenos Aires |
| Russell & Drexler S.A. | Buenos Aires |
| RV2000 | Buenos Aires |
| Ryaco | Buenos Aires |
| Ryder | Buenos Aires |
| Sage S.R.L. | Buenos Aires |
| SAM Sistemas | Buenos Aires |
| Sandstorm Interactive | Buenos Aires |
| SANI Hosting | Buenos Aires |
| Santa Fe Hosting | Santa Fe |
| Sapaoga Servicios Tecnológicos | Buenos Aires |
| Sapid Agency | Buenos Aires |
| Satelco Ingeniería S.A. | Buenos Aires |
| Savedata | Buenos Aires |
| Sawerin Networks | Buenos Aires |
| SCD Planet | Buenos Aires |
| SCD Servicios Informáticos, S.R.L. | Buenos Aires |
| Sebastian Thüer | Buenos Aires |
| Secure Informatica, S.R.L. | Santa Fe |
| Seek Sistemas | Buenos Aires |
| SEI Servicios Especiales en Informática S.A. | Buenos Aires |
| Selfmy Web Design | Buenos Aires |
| SEO Argentina | Buenos Aires |
| Seo Express | Buenos Aires |
| SEOnet | Buenos Aires |
| Serfe | Santa Fe |
| Sergio Montagna | Buenos Aires |