| Sysgarage | Buenos Aires |
| Systemscorp | Buenos Aires |
| Sytex | |
| SZnet | Buenos Aires |
| Tab-Control | Buenos Aires |
| Tacco Calpini S.A. | Buenos Aires |
| Tacticasoft | Buenos Aires |
| Taggify | Buenos Aires |
| Tai | Buenos Aires |
| Taligent | |
| TalSoft | Buenos Aires |
| Tarsis | Buenos Aires |
| Tasso | Buenos Aires |
| TAURO Computación | Buenos Aires |
| Taux Argentina | Buenos Aires |
| Teatrux | |
| Tec Solutions | Buenos Aires |
| Tec Solutions | |
| Tech-Services | Buenos Aires |
| Technology Bureau S.A. | Buenos Aires |
| Technology for Solution | Buenos Aires |
| Techys | Buenos Aires |
| Tecni-Todo | Buenos Aires |
| Tecnicos de PC | Buenos Aires |
| Tecno Acción | Buenos Aires |
| Tecno Brain | Buenos Aires |
| TecnoAp S.A. | Buenos Aires |
| TecnoCom | Córdoba |
| Tecnología y Desarrollo Informático | Buenos Aires |
| Tecnologiait | Buenos Aires |
| Tecnom | Buenos Aires |
| Tecnorea Group | |
| Tecnotrade International, S.R.L. | Buenos Aires |
| Tecro | |
| tecso Work Cooperative | Buenos Aires |
| Teira Consulting | Buenos Aires |
| Telefax Internet Balacarce | Buenos Aires |
| Telefonía Pública y Privada S.A. | Buenos Aires |
| Telematica | Buenos Aires |
| Telesonic S.R.L. | Buenos Aires |
| Telinfor S.A. | Buenos Aires |
| Telnet | Buenos Aires |
| Terzian Seguros | Buenos Aires |
| Tesacom | Buenos Aires |
| Tesis-OyS | Buenos Aires |
| Tesys | Buenos Aires |
| Texdinamo | |
| TGV | Buenos Aires |
| That Day In London | |
| The App Master | Buenos Aires |