| JSNet | Buenos Aires |
| Jubbler Technologies | |
| JusToken | |
| Kaizen Electrónica | Buenos Aires |
| Kardummen | |
| Karvi | |
| Kaszek | Buenos Aires |
| Katodica | Buenos Aires |
| Keepers.com.ar | Buenos Aires |
| Kilimo | |
| Kit Ingeniería Electrónica S.R.L. | Buenos Aires |
| Klixar | |
| Knett | Buenos Aires |
| Knowledge Management Systems, S.R.L. | Buenos Aires |
| Kodear | |
| Kunan | Córdoba |
| KyDat.com | Buenos Aires |
| La Base | Buenos Aires |
| La Casa del Cartucho | Buenos Aires |
| La Maquinita Co. | Buenos Aires |
| Lab9 | |
| Laboratorio Elea Phoenix, S.A. | Buenos Aires |
| Labsys S.A. | Buenos Aires |
| Laffont Ediciones Electrónicas S.A. | Buenos Aires |
| Lainco Software, S.A. | |
| LambdaClass | Buenos Aires |
| LAT Research | |
| LBS Informática | Buenos Aires |
| ldrs Network Services | Buenos Aires |
| LeArSoft | Buenos Aires |
| Legal Soft | Buenos Aires |
| Leonsinho | Buenos Aires |
| Lepton Sistemas | Buenos Aires |
| LG Sitios | Santa Fe |
| LiberaSOFT | Buenos Aires |
| LicenciasOnLine.com | Buenos Aires |
| LideraFX | Buenos Aires |
| Lightfaro | Buenos Aires |
| Lila Studio | |
| Linking Informática | Buenos Aires |
| Lircus | |
| Litebox | Buenos Aires |
| Literal IT Services | Buenos Aires |
| Litio 3D | Buenos Aires |
| Liveware S.A. | Buenos Aires |
| livra | Buenos Aires |
| Lobby Digital | Córdoba |
| LoboDesign | Buenos Aires |
| LocalHost Soluciones Innovadoras | Buenos Aires |
| Localpayment | Buenos Aires |