| Name | Region |
|---|---|
| Devision | Sofia |
| devlabs | Varna |
| Devnox | Veliko Tarnovo |
| DevriX | Sofia |
| DevScale | Sofia |
| DevStyle.io | Sofia |
| Devtitans Ltd | Sofia |
| DevUnit | Sofia |
| DIANIC | Sofia |
| DieS Web | Sofia |
| Digi.bg | Sofia |
| Digilab Bulgaria | Sofia |
| Digital Communications | Sofia |
| Digital ID | Sofia |
| Digital Lights Ltd | Sofia |
| Digital Systems Ltd | Varna |
| Digital Vision | Sofia |
| Digital Voivode | Sliven |
| Digital World Ltd | Sofia |
| Digital.bg | Sofia |
| Digitalk | Sofia |
| Digitalpoint | Sofia |
| DigitInk | Sofia |
| DilisNet | Sofia |
| Dinova Rusev & Partners | |
| Direct Media KRES | Sofia |
| DOBG Internet Company | Sofia |
| DoggoCollar | |
| Dolphin-3 | Varna |
| dom.BG | Sofia |
| DomainEye | Sofia |
| Donatix | Sofia |
| DotMedia | Sofia |
| Dreamix Ltd | Sofia |
| Droxic | |
| DRS Bulgaria Ltd | Sofia |
| Drumev Development Studio | Sofia |
| Drupal Bulgaria | Sofia |
| DSI Ltd | Sofia |
| Duksoft | Sofia |
| DV Play | Sofia |
| DVTests | Sofia |
| Dynamic Solutions | Sofia |
| Dynamic Solutions Group | Sofia |
| E-Card Ltd | Sofia |
| E-Sion.net | Sofia |
| Easy Credit | Sofia |
| Easy Credit | Sofia |
| EasyAds | Sofia |
| eBag.bg | Sofia |