| Corix AG | Solothurn |
| Cosapien GmbH | |
| Cotecna | |
| Couniq Consulting AG | Bern |
| Coworking Bottighofen | |
| Coworking Frauenfeld GmbH | |
| Coworking Lounge Tessinerplatz | |
| Coworking Switzerland | |
| CPAutomation S.A. | Fribourg |
| Creaholic S.A. | |
| Creaitor AI | |
| CREAL S.A. | |
| CREAL3D S.A. | Vaud |
| Crealogix AG | |
| Creanet Internet Services AG | Lucerne |
| Créateur de Site | Vaud |
| Creative Acts GmbH | Basel-Stadt |
| Creative Web Studio | Lucerne |
| CreativeSpace AG | |
| Credema AG | |
| Credit Europe Bank (Suisse) S.A. | |
| Credit Suisse Group AG | |
| Creditshelf AG | |
| Creisi Productions | Lucerne |
| Crisalix S.A. | |
| Cropmark | Aargau |
| Cropwise | |
| Cross Systems | Geneva |
| Crowdhouse AG | |
| Crowne Associates AG | Schwyz |
| Crypto Finance Group | |
| Crypto International AG | Zug |
| Crypto Valley Association | |
| CS-Computing GmbH | Aargau |
| CS2 AG | Basel-Landschaft |
| CSS Intensivstation | |
| CTC Analytics AG | Basel-Landschaft |
| ctf Informatik GmbH | Appenzell Innerrhoden |
| CTISTARTUP | |
| CTOL Digital Solutions | |
| Cubegrafik GmbH | Bern |
| Cubera Solutions AG | Zurich |
| cubic.ch GmbH | Zurich |
| Curatis AG | |
| Curio Biotech Ltd | |
| Customweb GmbH | Zurich |
| Cutiss AG | |
| CUTISS AG | |
| CV VC AG | |
| Cybelec S.A. | Vaud |