| Jocey Designs | Ontario |
| Joel Vandal | |
| Joesoftware, Inc. | Alberta |
| Joeweb Productions | Ontario |
| Johann's MostlyMac Computer Consulting | Ontario |
| John Abbott College | |
| John Atkins & Co. | Newfoundland and Labrador |
| John Clarke Consulting | British Columbia |
| John De La Torre | Ontario |
| John J. Rakos & Associates | Ontario |
| John Lynn Comunications | British Columbia |
| John Michaud Computer Services | Ontario |
| John Overall | British Columbia |
| John Yates | Saskatchewan |
| JOI Media, Inc. | Alberta |
| Joist, Inc. | |
| Jolera, Inc. | Ontario |
| Joliciel Développement | Quebec |
| Jolifish | Quebec |
| Jolly Giant Software, Inc. | Ontario |
| Jolt Systems | Ontario |
| JOMAR Softcorp International, Inc. | Ontario |
| Jon Burke | Nova Scotia |
| Jon C. Phillips | |
| Jonah Group Ltd | Ontario |
| Jonar | Quebec |
| Jonas Construction Software | Ontario |
| Jonas Software | Ontario |
| Jonathan Kohl | Alberta |
| Jonmar Ltd | Ontario |
| Joomla Bliss | Ontario |
| Joomla Montréal | Quebec |
| Jooska SEO | |
| JORAL Technologies | Ontario |
| Josée Tremblay Web & Design | |
| Jostle Corporation | British Columbia |
| Josto Computers | British Columbia |
| Jot Digital | |
| Journal of Medical Internet Research | |
| Journey Publishing, Inc. | Ontario |
| JP FullTech Systems | British Columbia |
| JP Media | Newfoundland and Labrador |
| JPBrosseaulab | |
| JpegCreations Design Studios | Quebec |
| JPL Programmation | |
| JR Computers | Ontario |
| JR Web Designs | |
| JRC Ltd | |
| JResults Digital Marketing | British Columbia |
| JRP Solutions Ltd | British Columbia |