| Cape Breton Web Design | Nova Scotia |
| Capella Telecommunications, Inc. | Ontario |
| CapeTown Computing | Ontario |
| Capian | Quebec |
| Capiche | |
| Capilano University | British Columbia |
| Capilano University - Computing & Data Science Department | British Columbia |
| Capital Angel Network | Ontario |
| Capital Canada Ltd | |
| Capital Data Recovery | Ontario |
| Capital Event Management Ltd | |
| Capital Networks Ltd | Ontario |
| Capital Park | |
| Capital Ridge | Ontario |
| CapitalTek | |
| Capitalware, Inc. | Ontario |
| Capitol Technologies | Ontario |
| CAPP Associates, Inc. | Ontario |
| Cappers | Ontario |
| Caprina Creative | British Columbia |
| Caprivi Solutions | Ontario |
| CAPSolar | Quebec |
| Capstone Ridge Group | Manitoba |
| Captec Americas, Inc. | Ontario |
| Captelco | Quebec |
| Captiva Innovations | British Columbia |
| Capybara Games, Inc. | Ontario |
| Car-San Manufacturing Ltd | Ontario |
| Caravan | Quebec |
| Carbide | |
| Carbon Computing | Ontario |
| Carbon Copy Laser | British Columbia |
| Carbon Engineering ULC | |
| Carbon Networks Ltd | |
| Carbon Streaming Corporation | |
| Carbon Web | Quebec |
| Carbon6 | |
| Carbon60 Operating Co. Ltd | Ontario |
| Carbone graphique | |
| Carbonified | |
| Carbonink Graphic Designer | Ontario |
| Carbonize | British Columbia |
| CarbonRun | |
| CarbonX Personal Carbon Trading, Inc. | |
| Carcajou Games | Quebec |
| Card Labs, Inc. | Alberta |
| CARDA Consultants, Inc. | Quebec |
| Cardac Systems, Inc. | |
| Cardant Holdings Ltd | |
| Cardboard Utopia | Quebec |