| World Service | Buenos Aires |
| Worldsys S.A. | Buenos Aires |
| Wormhole S.A. | Buenos Aires |
| Writing Instruments Shop | Buenos Aires |
| www.com.ar, S.A. | Buenos Aires |
| Xaersoft | Buenos Aires |
| Xcapit | Buenos Aires |
| Xelere | Buenos Aires |
| Xigma Internet & Computacion | Buenos Aires |
| Xinergia | Santa Fe |
| Xixtech | Buenos Aires |
| XMundo Networks | Buenos Aires |
| XOFT Tech S.r.l. | Buenos Aires |
| XRP | Buenos Aires |
| XTR Notebooks | Buenos Aires |
| Ypsilon Media | Buenos Aires |
| Zampatti Maida & Asociados | Buenos Aires |
| Zarego | Buenos Aires |
| ZConsulting S.R.L. | Chaco |
| ZedPlan | Buenos Aires |
| Zelarus | Santa Fe |
| Zennovia S.R.L. | Buenos Aires |
| Zenrise.io | Córdoba |
| ZERO Digital | Buenos Aires |
| Zeta Positivo | Buenos Aires |
| Zetenta | Buenos Aires |
| Zinc | Buenos Aires |
| ZONACROMO Comunicación Visual | Buenos Aires |
| ZonaPHP | Buenos Aires |
| Zonaprop.com.ar | |
| Zoo Logic S.A. | Buenos Aires |
| Zureo Software | Buenos Aires |