| Computer Analysts and Recovery Experts Pte Ltd | Singapore |
| Computer Book Centre | Singapore |
| Computer Network Technologies Pte Ltd | Singapore |
| ComputerGuys | Singapore |
| ConceptLane Pte Ltd | Singapore |
| Connectbit Pte Ltd | Singapore |
| ConnectCode Pte Ltd | Singapore |
| Connected Machines | Singapore |
| Consultancy.asia | Singapore |
| Content Concepts | Singapore |
| Continental Services Pte Ltd | Singapore |
| Conversion Hub | |
| CoQoons Coworking Pte Ltd | Singapore |
| Corbell Technology Pte Ltd | Singapore |
| CorpZap Pte Ltd | Singapore |
| Cortical Labs Pte Ltd | Singapore |
| Coselec Pte Ltd | Singapore |
| Cosmose, Inc. | Singapore |
| Cosmoweb Pte Ltd | Singapore |
| Courts Singapore Webstore | Singapore |
| Covalent Capital | Singapore |
| CPO Magazine | Singapore |
| Create Technologies | Singapore |
| Creatella | Singapore |
| Createsoft Computer & Trading Pte Ltd | Singapore |
| Creative Eworld Pte Ltd | Singapore |
| Creative Knowledge Ltd | Singapore |
| Creative Technology Ltd | Singapore |
| Creative-T | Singapore |
| CreativeEdge | Singapore |
| Credo Diagnostics Biomedical Pte Ltd | Singapore |
| CreoPop | Singapore |
| CrimsonLogic Pte Ltd | Singapore |
| Cristal Solutions Pte Ltd | Singapore |
| CrossShore Solutions Pte Ltd | Singapore |
| Crowd Genie Financial Services Pte Ltd | Singapore |
| CRS Communications | Singapore |
| Crystal Home | Singapore |
| CSE Global Ltd | Singapore |
| CSSSR | Singapore |
| Ctrl Alt Del | Singapore |
| CtrlWorks Pte Ltd | Singapore |
| Culum Capital Pte Ltd | Singapore |
| Cuny’s Global Pte Ltd | Singapore |
| Custodio Technologies | Singapore |
| Cyber Intelligence House | Singapore |
| Cyber Security Agency of Singapore | Singapore |
| Cyber Solution | Singapore |
| Cyber Ultra Network | Singapore |
| Cybermarine | Singapore |