| Digilab Bulgaria | Sofia |
| Digital and Software Solutions | |
| Digital Communications | Sofia |
| Digital Connection | |
| Digital ID | Sofia |
| Digital Lights Ltd | Sofia |
| Digital Marketing Group | |
| 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 |
| DIV Motion Ltd | |
| 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 |
| EasyAds | Sofia |
| eBag.bg | Sofia |
| eCenter | Sliven |
| Economic Development via Innovation & Technology | Sofia |
| eDesign Interactive AD | |
| Edoms | Sofia |
| EduTechFlag Ltd | Sofia |
| eFellows | Sofia |
| Effect Group | Varna |
| elando | Sofia |
| Elders Ltd | |