| Dot Design Studio | Cluj |
| dotLumen | |
| Dpixel Agency | |
| Dream Webdesign | Argeș |
| Druid AI | Bucharest |
| dsp-studio.ro | Bucharest |
| DTK Security | Vâlcea |
| Ducadu | Prahova |
| Durran | |
| Duty Labs | |
| DX Software | |
| Dynamic DOX | |
| e-sistem.ro | Ialomița |
| EA Design Studio | Iași |
| Early Game Ventures | |
| East Vision Systems | |
| East-Tec | Bihor |
| Easy IT S.R.L. | Bucharest |
| Easy Media S.R.L. | Bucharest |
| EasyDo 247 Digital Technologies | |
| easySales | |
| easySales | |
| eAtlas | Timiș |
| Eau de Web | |
| EazyCode | |
| Eben Advertising | |
| EBIG | |
| ECDL România | |
| Economis | Bucharest |
| EDGE Software Solutions S.R.L. | |
| Ediris.ro | Mureș |
| EDUS.ro | |
| EEU Software | Bucharest |
| Ejobs.ro | Bucharest |
| eJump Media | |
| Elastic Studio | |
| Elcom International | Bistrița-Năsăud |
| eLearning & Software Ltd | |
| Electro Mobile S.R.L. | Maramureș |
| Electronic Design & Consulting Group - Informatica S.R.L. | Bucharest |
| ELIAN | |
| Elite Pro S.R.L. | Bucharest |
| Elstar | Bihor |
| ELTOP Electronics | Bucharest |
| Elysian Software | |
| eM2Soft S.R.L. | |
| eMAG.ro | Bucharest |
| Emerigos | Bihor |
| Emiral | |
| EMOTIONstudios | |