| JRS Consulting | Ontario |
| JRS VirtualStudio, Inc. | Ontario |
| JRX | Ontario |
| JS Digital Marketing | British Columbia |
| JS-Montréal | Quebec |
| JSB Multimedia, Inc. | Ontario |
| JSGUIL, Inc. | |
| JSI Data Systems Ltd | Ontario |
| JSI Research Chemicals, Inc. | |
| JSI WebTools | Ontario |
| JSO Web Dev | |
| JSS recherche médicale | |
| JTC Technologies | Ontario |
| JTG Systems | Ontario |
| JTG Systems Welland | Ontario |
| JTS Tech Services | Ontario |
| Juan Vasquez | Quebec |
| Jubarte Design | |
| JUDI.AI | British Columbia |
| Judy Intelligence, Inc. | |
| Juggernaut Computers | Manitoba |
| Juice Computer | Ontario |
| Juicebox Group | |
| Juiced Digital Agency | |
| Juicy Beast Studio Ltd | |
| Jukah Digital | Prince Edward Island |
| Julia Evans | |
| Julian Thomas Screawn | New Brunswick |
| Julien Thomas | |
| Julivi CAD/ERP Systems | Ontario |
| July 9 Studios | |
| Jump Analytics, Inc. | |
| Jump I.T. | Ontario |
| Jump Network Telecommunications Ltd | Ontario |
| Jump Tech | |
| Jump+ | Ontario |
| Jump.ca | Saskatchewan |
| JumpSearch.ca | Ontario |
| Junip, Inc. | |
| Juno College | Ontario |
| Juno EMR | British Columbia |
| Juno Pharma Canada, Inc. | |
| Juno Pharmaceuticals | |
| Jupia Consultants, Inc. | |
| Jurando and Associates | Ontario |
| Juris Concept | Quebec |
| Jurismedia, Inc. | Quebec |
| Just Accessories | Ontario |
| Just BioFiber | |
| Just Consult | |