| Camos Software und Beratung GmbH | Baden-Württemberg |
| Camovis GmbH | |
| Campus Founders Ventures GmbH | |
| Campus Hackathon | Berlin |
| Campus Venture Beteiligungsgesellschaft mbH | |
| Campus Verlag GmbH | |
| Campus-Service GmbH | North Rhine-Westphalia |
| CAMTEC Systemelektronik GmbH | Baden-Württemberg |
| Camunda Services GmbH | |
| Can do GmbH | Bavaria |
| Canaletto Internet GmbH | Saxony |
| CANCOM SE | Bavaria |
| Candis GmbH | |
| candylabs GmbH | |
| Canon Deutschland GmbH | North Rhine-Westphalia |
| Cansativa Group | |
| CANTON Elektronik GmbH & Co. KG | Hesse |
| CAPCAD Systems AG | Bavaria |
| CAPCom AG | Hesse |
| capella-software AG | Hesse |
| CAPI Association i.L. | Berlin |
| Capital Intermodal | |
| CapLab GmbH | Baden-Württemberg |
| Capmo GmbH | |
| Capmont Technology GmbH | |
| Capnamic Ventures | Berlin |
| CapnoPharm GmbH | |
| Capricorn Scientific GmbH | |
| Captain FTP | Hamburg |
| Captain T Cell GmbH | |
| CapTrader GmbH | |
| Captron Electronic GmbH | Bavaria |
| CAQ AG Factory Systems | Rhineland-Palatinate |
| Cara.Care | |
| Carano Software Solutions GmbH | Berlin |
| CARAT GmbH | Hesse |
| Carbmee GmbH | |
| CarboCode | |
| Carbonfuture GmbH | |
| Cardiac Dimensions Europe GmbH | |
| Cardior Pharmaceuticals GmbH | |
| CardioSecur | |
| Cardisio GmbH | |
| Care Companion GmbH | |
| CARECOM | North Rhine-Westphalia |
| Career.pm | Baden-Württemberg |
| CareerFoundry GmbH | Berlin |
| Cargo Support GmbH & Co. KG | Bavaria |
| Cargoclix | |
| Cargomotion | |