| Caliber Control Systems Ltd | Alberta |
| Caliber Data Labs | British Columbia |
| Calibre Consulting | Alberta |
| Calibre Design & Marketing Group, Inc. | Ontario |
| Calibre Plus | Quebec |
| Calico Communications | Ontario |
| Calico Internet Solutions, Inc. | Quebec |
| Calico Logic, Inc. | British Columbia |
| Call Select | |
| Call The Grandkids, Inc. | |
| Call4PCHelp | Ontario |
| Calla Design | British Columbia |
| CallClerk | Ontario |
| Calliere Group | Quebec |
| Calliflower | Ontario |
| Callista CTI | Ontario |
| Callow & Associates | |
| Callture Communications, Inc. | Ontario |
| Calnetic, Inc. | |
| Calogy Solutions | Quebec |
| Calow Networks | Saskatchewan |
| Calputer Business Solutions | Alberta |
| Calta Computer Systems Ltd | Alberta |
| Caltec Solutions | British Columbia |
| Caludia Beauregard | Quebec |
| Calvin Consulting Group Ltd | Alberta |
| Calwell, Inc. | Ontario |
| Calypso Communication, Inc. | Quebec |
| Cam Solutions | |
| Cambian Business Services, Inc. | British Columbia |
| Cambrian College | |
| Cambrian Credit Union | |
| Cambrian Software, Inc. | Ontario |
| Cambridge Digital Marketing | |
| Cambridge Electronics, Inc. | Alberta |
| Cambridge Global Payments | Ontario |
| Cambridge Solutions, Inc. | Ontario |
| CamCentral Systems, Inc. | British Columbia |
| Camcloud | |
| Cameleon | Quebec |
| Caméléon | |
| Cameron Web Services | Nova Scotia |
| Camis | Ontario |
| Camosun College | British Columbia |
| Camp Tech | Ontario |
| Campaigner | Ontario |
| Campana Systems | Ontario |
| Campayn.com | Ontario |
| Campbell Scientific Canada | |
| CampBrain | Ontario |