| Happy Advertising | |
| Happy Pencil | |
| Happy Recruiter S.A. | |
| Happy Web | |
| HappyHosting.ro | Gorj |
| Hart Consulting | |
| Head Hunting IT | Bucharest |
| HED Solutions S.R.L. | |
| HEITS.digital | |
| hhconsulting | |
| Hieroglyph Consulting | Bucharest |
| HOFAG Engineering | Prahova |
| HoliSun | Maramureș |
| Host-Age.ro | Bucharest |
| Hosterion | Cluj |
| Hostico | Bucharest |
| HostMonter | Bucharest |
| HostVision S.R.L. | Cluj |
| HostX.ro | Bucharest |
| HostZilla | Dolj |
| How to Web | Bucharest |
| HP Infotech S.R.L. | Bucharest |
| HQ Level Business Services S.R.L. | Timiș |
| HR Time | |
| HungryBytes | |
| Hypercubic IT Outsourcing | Bucharest |
| HyperSense Software | Bucharest |
| Iaşi It S.R.L. | Iași |
| ICD Web | |
| Icetech | Arad |
| ICG Integrated Consulting Group S.R.L. | |
| IcoFX | Bucharest |
| ICS Design | Dolj |
| ID System | Mureș |
| Idea::Bank România | Bucharest |
| Ideance | Iași |
| IF Soft S.R.L. | |
| Ilco Networks S.R.L. | Bucharest |
| iMAKE3D | |
| IMATI Software S.R.L. | |
| ImobiliPro | Sibiu |
| ImOK | |
| Impactweb | Dolj |
| IMT-Bucharest | Bucharest |
| INAS S.A. | Dolj |
| Inatech S.R.L. | |
| INCAS | |
| Incuboxx | |
| Indaco Systems | Bucharest |
| Indeo Soft | |