| J.L.C. Group | Ontario |
| J.P. Peach & Associates | Quebec |
| J2, Inc. | |
| J2S Info Tech | |
| J3 Solution | |
| J3BWeb | Quebec |
| JAC | Newfoundland and Labrador |
| Jack Of All Trades Design | Ontario |
| Jackets Creative | |
| JackRabbit High Speed Hosting | |
| Jackson Begg Ltd | Ontario |
| Jackson Wynne | Ontario |
| JADE Software Systems, Inc. | Alberta |
| JAE Automation | Ontario |
| Jafiot | |
| Jafla Design | Ontario |
| Jaguar Capital, Inc. | |
| Jaguar Financial Corporation | |
| Jaguar Média, Inc. | Quebec |
| Jaguar Solutions, Inc. | Quebec |
| Jaguar Tech | Quebec |
| JAK Media, Inc. | Ontario |
| Jakarto 3D Mapping, Inc. | |
| Jakhu, Inc. | Ontario |
| Jakin ID Technology, Inc. | British Columbia |
| JaLin Productions | Alberta |
| Jam3 | Ontario |
| Jamaxx Web Design | British Columbia |
| Jamberee | British Columbia |
| Jambo | |
| James & Sons Electic | British Columbia |
| James Evans and Associates Ltd | British Columbia |
| James Gaudet | |
| Jami | |
| JAMP Pharma | |
| Jana Laboratories, Inc. | Ontario |
| Janalta Interactive, Inc. | Alberta |
| Jane Software, Inc. | |
| Janet Martin | British Columbia |
| Janice and Robin | Ontario |
| Jannatec Technologies | |
| JAPR Tech | |
| Jarbiz | |
| Jared Reich | |
| Jas Info Technologies | |
| JASGroup Technologies, Inc. | Alberta |
| JasonSeale.com | British Columbia |
| JasonTech | |
| JasonTEK, Inc. | |
| Jatheon Technologies, Inc. | Ontario |