| Conquest Planning, Inc. | Manitoba |
| Conscia Corporation | |
| Conscia.ai | |
| Conseil canadien de l’identification et de l’authentification numériques | Ontario |
| Conseil de l'innovation du Québec | Quebec |
| Conseil économique de Beauce | |
| Conseil emploi métropole | |
| Conseil québécois du commerce de détail | |
| ConseilsWeb | Quebec |
| Consensus Creative Corporation | |
| Consensus Medical Systems, Inc. | British Columbia |
| Consider Canada City Alliance | Ontario |
| Consomme Ltd | |
| Consortech | Quebec |
| Consortium de recherche et d'innovation en aérospatiale au Québec | |
| Consortium de recherche et d’innovation en aérospatiale au Québec | Quebec |
| Consortium de recherche et innovations en bioprocédés industriels au Québec | |
| Consortium for Software Engineering Research | |
| Consortium Québécois sur la Découverte du Médicament | |
| Constant C Technology Group | Manitoba |
| Constellation Computers | Manitoba |
| Constellation HomeBuilder Systems | Ontario |
| Constellation Software, Inc. | Ontario |
| Constellio | Quebec |
| ConstructBuy | Quebec |
| Construction Virtuelle et Technologie BIM One, Inc. | |
| Constructive Media | British Columbia |
| Consultaions Datact | |
| Consultation BENEFYS, Inc. | Quebec |
| Consultation NMi Consulting | Quebec |
| Consultation SOS | Quebec |
| Consultech Informatique, Inc. | Quebec |
| Consultech.Info | |
| Consultica | Manitoba |
| Consultica Software Services, Inc. | |
| Consumer Smart Media | |
| Consyst SQL, Inc. | Quebec |
| Contact Automation, Inc. | |
| Contact Boss | |
| Contact Canada | British Columbia |
| Contact Informatique | Quebec |
| Contact Innovations | Ontario |
| Contact Strategies | Ontario |
| Contactzilla | |
| Contalitec Informatique, Inc. | Quebec |
| Contax, Inc. | Ontario |
| Contech Creatives | |
| Contego Tech Solutions | Alberta |
| Contemporary Computers | Ontario |
| Contendo | |