| Trestle Ridge | |
| Treventis Corporation | |
| Trevlac Computer Services Ltd | Ontario |
| Trevor Tynes | Ontario |
| TREX Ai | |
| Trexo Robotics | |
| TRGR Advertising Ltd | |
| Tri Tech | |
| Tri Tech Information Systems | British Columbia |
| Tri-City | British Columbia |
| Tri-City Retail Systems, Inc. | Ontario |
| TRi-D-FX Security | Alberta |
| Tri-global Solutions Group, Inc. | Alberta |
| Tri-M Technologies, Inc. | British Columbia |
| Tri-Media Integrated Marketing Technologies, Inc. | Ontario |
| Tri-Star Computers | Ontario |
| Triacolyte Business Solutions, Inc. | Ontario |
| Triacom | |
| Triade | Quebec |
| TrialStat Solutions, Inc. | |
| Triamedia | Quebec |
| Triangle Research International, Inc. | British Columbia |
| TribalScale | Ontario |
| Tribe | |
| Tribe Network | |
| Tribe Technologies, Inc. | |
| TriBro Studios | |
| Tribute Games, Inc. | |
| TriCarm Software, Inc. | Ontario |
| Tricim | Ontario |
| Tricity Computers | British Columbia |
| TriCube Media | Alberta |
| Tridon Communications | Alberta |
| Triera Biosciences | |
| Trigger Internet Solutions | Ontario |
| Trignofy | |
| Trigon Computer Solutions Ltd | Ontario |
| Trigonix | Quebec |
| TrillaBit | |
| TrilliumPC Network Solutions, Inc. | British Columbia |
| Trillys Systems, Inc. | Ontario |
| Trilogiam | |
| Trilogie | Quebec |
| Trilogix Electronic Manufacturing | Quebec |
| Trilogy-Net, Inc. | |
| TRIM-P.O.S. Software Corporation | Ontario |
| Trimmed Creative | |
| Trinary | |
| Trinergie | Quebec |
| Trinetra | |