| TRAF, Inc. | |
| Traffic Engineering Software | |
| Traffic Marketing + Design, Inc. | Ontario |
| TrafficSoda | Ontario |
| Traffitise | |
| TraficJunky | Quebec |
| Trafick Interactive Media Solutions | Saskatchewan |
| Traficmedia | |
| Trailmark Systems, Inc. | |
| Trainer+ | |
| Trainerize | |
| TRAINFO | |
| Training Vancouver | British Columbia |
| Training Works, Inc. | |
| TrainingPartner | British Columbia |
| TrainingPlaces.ca | Ontario |
| Trait Marketing | |
| Trajectoire Québec | Quebec |
| Trajectory Group, Inc. | Ontario |
| Trak Com Wireless, Inc. | Ontario |
| TRAK Data, Inc. | |
| Tram Média | Quebec |
| Trampoline Branding | |
| Tranquility | |
| Trans Bio Tech – Centre de recherche et de transfert en biotechnologies | Quebec |
| Trans International Communications | Alberta |
| Trans+Plus Systems Corporation | Ontario |
| TransACT Communications Canada Ltd | Alberta |
| TransBIOTech | |
| TransCanadaHwy | Ontario |
| Transcat, Inc. | |
| Transcend Communications Corporation | Ontario |
| Transcension Media | Manitoba |
| Transcriptome Sciences | |
| TransData Internet Services | Ontario |
| TransferTech Sherbrooke | Quebec |
| Transformation Software, Inc. | Ontario |
| Transformative Quantum Technologies | |
| Transformix Engineering | Ontario |
| Transglobal Systems of Canada, Inc. | Ontario |
| TransGrid Solutions, Inc. | Manitoba |
| Transistor Software | |
| Transit | Quebec |
| Transit Network | Ontario |
| Transit-bids.com | |
| Transition Services Conseils, Inc. | Quebec |
| Translane Systems, Inc. | |
| Translatum Medicus, Inc. | |
| Transledger | |
| TransLink | |