| Name | Region |
|---|---|
| Devign Studios | |
| Devious Solutions | |
| DevITjobs | |
| Devlin Electronics Ltd | Hampshire |
| DevNinja | |
| DevOcean Services | |
| Devon Web Designs | Devon |
| Devonto Ltd | |
| DevOps consultancy | |
| DevOps Engineering | |
| DevOrbit | |
| DevOwt Digital | |
| Devoxx UK | |
| Devphics | |
| Devro Ltd | |
| Devroom | |
| Devsphere | |
| DevsStream Ltd | |
| Devstack Consultancy Ltd | |
| Devstree UK | |
| DevStudioAI | |
| Devto Ltd | Lancashire |
| Devute UK Ltd | West Yorkshire |
| Devyce | |
| Dewsign Ltd | Greater London |
| Dexdyne Ltd | Gloucestershire |
| Dexon Software Ltd | Greater London |
| Dexory | |
| DexProtector | |
| Dext | Greater London |
| Dexter Digital | |
| Dexterous Designs Ltd | |
| Dexterous Software | |
| DezineStream | |
| Dezrez Services Ltd | Swansea |
| DG Newmedia Ltd | Somerset |
| DG Partners, LLP | |
| DG Solutions | |
| DGSOL | |
| DH Creative Solutions | |
| DH Websites | |
| DHA Computers | Berkshire |
| DHosting | Lancashire |
| Dhound Cybersecurity | |
| Dia Beta Labs Ltd | |
| Diabetech | |
| Diaceutics plc | |
| Diagknows Ltd | |
| DiagNodus Ltd | |
| Diagnostics.ai |