| Java Logix | Quebec |
| Javascript Obfuscator.com | Ontario |
| Javelin Technologies, Inc. | Ontario |
| Jaw Droping Marketing | |
| Jay Analytix | |
| Jay Kay Systems Consulting, Inc. | Alberta |
| JAY Technologies, Inc. | Quebec |
| JAZ Marketing & Design | Ontario |
| Jaza Energy | |
| Jazzé | Quebec |
| jBilling | Ontario |
| JBJ Computers | British Columbia |
| JBL Soft, Inc. | New Brunswick |
| JC Computers | Ontario |
| JC Kelly | Ontario |
| JC WebOptions | Quebec |
| JC Wilton Ltd | Ontario |
| JCDS Solutions, Inc. | Quebec |
| JCMB Technology, Inc. | Quebec |
| JCTWD | Ontario |
| JD Communication and Design | Ontario |
| JDH Warehousing Systems Ltd | Ontario |
| JDIS | Quebec |
| JDL Technical Services | Ontario |
| JDPSoftwareSolutions | |
| Jean Lasnier | Quebec |
| Jean-François Blais Designer Web | Quebec |
| Jean-marc Boscq Informatique | Quebec |
| Jeanrioux.net Programmeur Web | Quebec |
| jEdit | Ontario |
| Jedron Software | Ontario |
| Jeet Technologies | |
| Jeff Rendek | Alberta |
| Jeff Rivett Consulting | British Columbia |
| Jeff Social Marketing | |
| Jeffhardy.pro | Ontario |
| Jelly Marketing | |
| jemaffiche.com | Quebec |
| Jen Research, Inc. | Ontario |
| JensenGroup | |
| JenTekk | British Columbia |
| Jenthera Therapeutics | |
| Jerika, Inc. | Ontario |
| Jessica Rousseau Design | Ontario |
| Jesta I.S. | Quebec |
| Jester Creative, Inc. | Ontario |
| Jet 2 Net Internet Solutions | Ontario |
| Jet Black Games | British Columbia |
| Jet Tel Solutions, Inc. | Ontario |
| JetDog | British Columbia |