| IRBIS S.R.L. | Bucharest |
| Irdasys | Bucharest |
| Iristel România S.R.L. | Bucharest |
| IRON Sheep TECH | |
| ISA | Bucharest |
| ISANET Software | |
| IT Asistență | Bucharest |
| IT Assist | Bucharest |
| IT Direct | Bucharest |
| IT Exchange | Cluj |
| It Genetics S.R.L. | Bucharest |
| IT Smart Systems | |
| IT Vision S.R.L. | Bucharest |
| IT Web Services | Vâlcea |
| It-euroconsult.ro | |
| ITarena.ro | Bucharest |
| ITCNET | Bucharest |
| ITNet | Bucharest |
| ITNT | Sibiu |
| iTrade Systems | |
| Joker Sarina S.R.L. | Satu Mare |
| JSHeroes | Cluj |
| Junior Soft | Bucharest |
| JUNO Software S.R.L. | Bucharest |
| Justpixel | Bucharest |
| KA Damar Import Export S.R.L. | Bucharest |
| Karma | Bistrița-Năsăud |
| KennoMedia | Bucharest |
| Kepler Systèmes d'information | Bucharest |
| Key Soft S.R.L. | |
| KFactory | |
| Kinderpedia | |
| Kinetic Software | Bucharest |
| King Systems S.R.L. | Maramureș |
| Kodis | Bucharest |
| Kondiment | Bucharest |
| Konica Minolta Business Solutions Romania S.R.L. | Bucharest |
| KPIs Studio | |
| Kronect | Bucharest |
| Kronsoft Development S.R.L. | |
| Kubitech S.R.L. | |
| Kvm Dot Ro | Bucharest |
| L2 | |
| LaDent | Cluj |
| Lambert Group Productions | Bucharest |
| Lamit Company | Bucharest |
| Land of Web | |
| Landingexam | |
| Lasting Software | Timiș |
| LASTING Software | |