| Deviz | Brașov |
| DevNest | |
| DevTalks | |
| Diablos Computer | Bucharest |
| Diadi Telsat | Bucharest |
| Diamond Consulting | |
| Different View | Bucharest |
| Digi Communications N.V. | Bucharest |
| Digidemat | |
| DigiSign S.A. | Bucharest |
| Digital Access Network S.R.L. | Bucharest |
| Digital Artflow S.R.L. | Bucharest |
| DIGITAL ByteDesign | Cluj |
| Digital Design Team | Bucharest |
| Digital Expression | Bucharest |
| Digital Metrics | |
| Digital Ninja | |
| Digital Partners | |
| Digital Software Development | Bucharest |
| Digital Star | |
| Digital Systems XXI S.R.L. | Bucharest |
| Digital Workforce S.R.L. | |
| DigiTales | |
| Digitalhero | |
| Digitalya | |
| DigiTech Solutions | Bucharest |
| Digitline Automatizari S.R.L. | Bucharest |
| DirectWEB | Harghita |
| Display Solutions | |
| DlhSoft | Cluj |
| Docbook | |
| DocProcess | |
| DominioPC | Cluj |
| Donau | Cluj |
| DoPDF by Softland | Cluj |
| Dot Design Studio | Cluj |
| Dream Webdesign | Argeș |
| Druid AI | Bucharest |
| dsp-studio.ro | Bucharest |
| DTK Security | Vâlcea |
| Ducadu | Prahova |
| 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 | |