| China Internet Watch | Singapore |
| Chugai Pharmabody Research Pte Ltd | Singapore |
| Cialfo | Singapore |
| Cinarra Systems Pte Ltd | Singapore |
| Circles.Life | Singapore |
| Cisco Singapore | Singapore |
| Citibank Singapore | Singapore |
| Civil Service College | Singapore |
| ClassIn | |
| Cleantech Energy Corporation Pte Ltd | Singapore |
| ClearEdge | Singapore |
| Click Ventures Pte Ltd | Singapore |
| ClickHere2 Network Pte Ltd | Singapore |
| Clickr Media | Singapore |
| Clicks To Success | Singapore |
| clickTRUE Pte Ltd | Singapore |
| Cloak Pte Ltd | Singapore |
| Closely Coded Pte Ltd | Singapore |
| Cloud Comrade Pte Ltd | Singapore |
| Cloud Security Alliance | Singapore |
| Cloud Tech Ventures Pte Ltd | Singapore |
| CloudKinetics | Singapore |
| CloudMile, Inc. | Singapore |
| CloudRock | Singapore |
| CloudSEK | Singapore |
| Cloudsquire Pte Ltd | Singapore |
| Cloudwise | Singapore |
| Cloudzen | Singapore |
| CNSG Consulting Group | Singapore |
| Cobo | Singapore |
| CoCRE8 | Singapore |
| Coda Payments Pte Ltd | Singapore |
| Codebay | |
| Codigo | |
| Cognius.ai | Singapore |
| Cogo | Singapore |
| Cohesion Network Technologies | Singapore |
| COMAT | Singapore |
| Combuilder Pte Ltd | Singapore |
| COMEX Singapore | Singapore |
| ComfortDelGro Corporation Ltd | Singapore |
| Comline Services | Singapore |
| CommIT Consultants | Singapore |
| CommonTown Pte ltd | Singapore |
| CommunicAsia | Singapore |
| CommzGate | Singapore |
| Comnect Communications Pte Ltd | Singapore |
| ComnetSolutions Pte Ltd | Singapore |
| Compex Systems Pte Ltd | Singapore |
| CompleteHub IT Solutions | Singapore |