| Creatix Media Development | |
| Credia Fintech S.R.L. | |
| Criosweb | Dâmbovița |
| CRIsoft | |
| Crystal Eye | |
| CS Romania | |
| CS-Software S.R.L. | Bucharest |
| CSSTemplatesForFree | Bucharest |
| Cubic Agency | |
| Cubus Arts | Sibiu |
| CubyCode | |
| Custom Code Factory | |
| Custom Web | Bucharest |
| CustomSoft | |
| CyberGhost S.A. | Bucharest |
| Cybernet S.R.L. | Bucharest |
| cyber_Folks S.R.L. | |
| Cypien | |
| D-NET Communication Services | |
| DAB MSP | Prahova |
| Dabex Online Market S.R.L. | Bucharest |
| Dacosoft Solution S.R.L. | |
| Dallnet | Bucharest |
| Danco Vision S.R.L. | Bucharest |
| Dante-HD Computers & Trading | Bucharest |
| Dare Digital | |
| Data Core Systems | |
| Data Revolt Agency | |
| data/morphosis | |
| Datacom International S.A. | |
| DataFlux Software | |
| DataGrab | |
| Datanest | |
| Datanet Systems | Bucharest |
| DCS Plus | Bucharest |
| Dealinweb | |
| Deboot | Timiș |
| DEC-IT | |
| Deck Computers | Bucharest |
| Deduxer S.R.L. | |
| Deep Vision | |
| Defend IT | Alba |
| Dehalo | |
| DeliteSoft S.R.L. | |
| Delphi Webdesign | Bucharest |
| Delta HR Consult | |
| Dendrio | Bucharest |
| Design of Frames | Bucharest |
| Design Your Way | |
| DesignNow | |