| DataVoyage | Zlatibor |
| Dayens d.o.o. | Mačva |
| DeedDesign Studio | Belgrade |
| Deo Posla d.o.o. | Belgrade |
| Deshodes | Belgrade |
| DESK Computers | Belgrade |
| Devana Technologies d.o.o. | Belgrade |
| DevSerbia Ltd | South Bačka |
| Dexsoft Games | South Bačka |
| Diamond Code | Belgrade |
| Digital Computers d.o.o. | South Banat |
| DIGITAL Direct | Belgrade |
| DigitalARTS | Belgrade |
| Digitalna Srbija | Belgrade |
| Digitalpro d.o.o. | Raška |
| Digitaz | South Bačka |
| Digitizer | Belgrade |
| Dizajn Zona | Belgrade |
| DNA d.o.o. | Belgrade |
| Dolap | Nišava |
| Dragana Djermanović | South Bačka |
| Dream Technologies Group d.o.o. | Belgrade |
| Drustvo za Informatiku Srbije | Belgrade |
| Dual | Rasina |
| DunavNET | South Bačka |
| E-CAPS d.o.o. | South Bačka |
| E-SEO Team | Belgrade |
| e-Serbia design | Belgrade |
| ECD | Belgrade |
| EdTech Center Western Balkans | Belgrade |
| Eklektika Web Design Company | Belgrade |
| Elbert Virtual Games | Belgrade |
| Electronic Design | Belgrade |
| ELITE Solution Web Technologies | Belgrade |
| Elkom | Belgrade |
| Emmi | Belgrade |
| Energosoft | South Bačka |
| Enetel Solutions | Belgrade |
| Enigmatic | Belgrade |
| Entitet d.o.o. | South Bačka |
| Epix Entertainment | South Bačka |
| Esteh d.o.o. | Belgrade |
| Eurodesk d.o.o. | Belgrade |
| EUtelNet design & development | Belgrade |
| Ewasoft | South Bačka |
| Ewe COMP | Belgrade |
| EX Ecentar d.o.o. | Belgrade |
| Exdizajn | Belgrade |
| Exe Net Advertising d.o.o. | Nišava |
| Execom, d.o.o. | South Bačka |