| CliftonGroup International Ltd | |
| Clik.ai | |
| Clikoweb | |
| Climate Insider | |
| Climate Ventures | |
| Climative | |
| CLiNFO | Quebec |
| ClinicAid.ca | British Columbia |
| Clinical Trials Ontario | |
| ClinicGlide Technologies, Inc. | |
| Clinicmaster | |
| Clinique d'accompagnement entrepreneurial | |
| Clinique électronique RD, Inc. | |
| Clinisys EMR, INc. | |
| Clio | British Columbia |
| Clip Mobile, Inc. | |
| Clipping Path Experts BD | |
| Clipwire Pte Ltd | Ontario |
| CliqueIA | |
| Clir Renewables | |
| CLM Consulting, Inc. | Ontario |
| Clockora | |
| CloseReach | Ontario |
| Cloud 7 I.T. Services | |
| Cloud Canal Corporation | |
| Cloud Choice | Ontario |
| Cloud Collective, Inc. | |
| Cloud Forces | Ontario |
| Cloud Horizon | Quebec |
| Cloud Lion, Inc. | Quebec |
| Cloud Nova | |
| Cloud Pilots, Inc. | |
| Cloud SynApps, Inc. | |
| Cloud Systems | British Columbia |
| Cloud Walk Software | |
| Cloud-A Computing | |
| cloud.ca | Quebec |
| Cloud247 | |
| Cloud9 Solutions | British Columbia |
| CloudAdvisors | |
| CloudAlly Ltd | |
| CloudArmy | British Columbia |
| CloudForex | |
| CloudGenie Corporation | |
| Cloudhead Games Ltd | |
| Cloudiverse | |
| CloudKettle | |
| Cloudli Communications, Inc. | |
| CloudLink Technologies | |
| CloudLocal Technologies | |