| Capturi | |
| Cardlay A/S | Region of Southern Denmark |
| Cardlay A/S | |
| Carl C A/S | Central Denmark Region |
| Casalogic | Region Zealand |
| CathVision ApS | |
| cBrain | Capital Region of Denmark |
| CC:Networks | |
| CCPro | Capital Region of Denmark |
| Centre for Scientific Computing Aarhus | Central Denmark Region |
| CerCell A/S | |
| CERTA Intelligence & Security | |
| Certainly | |
| CESCOM | North Jutland Region |
| Cessatech A/S | |
| ChangeGroup | Capital Region of Denmark |
| ChannelCRM | Capital Region of Denmark |
| CheatSheet.WTF | |
| ChemoMetec | |
| Chili Security Denmark ApS | |
| Chocolate Cloud ApS | |
| Chrisper Automatdrejning | |
| Chromaviso | |
| CIM PrintTronic A/S | Central Denmark Region |
| CIM.AS | Capital Region of Denmark |
| CIMCO A/S | Capital Region of Denmark |
| Cirqle Biomedical | |
| Clarus, Company & Partners ApS | Central Denmark Region |
| Classerium A/S | |
| Clearhaus A/S | |
| Clever Choice | |
| Clever Choice | |
| Climaider | |
| Clinical Microbiomics | |
| Clockwork Reklamebureau A/S | |
| Cloud Circus ApS | North Jutland Region |
| Cloud Factory A/S | |
| Cloud123 ApS | |
| Cloudhuset A/S | |
| Cloudify | |
| CluedIn | |
| CM Network A/S | |
| CN Group CZ, a.s. | |
| Coalescent Mobile Robotics | |
| Cobiro | |
| Codafweb ApS | |
| Code3 ApS | Capital Region of Denmark |
| Code3 ApS | |
| Codeable | |
| CodeCompany.dk | |