| Tronos | |
| Troops Consulting, Inc. | Ontario |
| Tropical Web Shop, Inc. | Ontario |
| Troubleshooters Computer Services, Inc. | British Columbia |
| Trouvus | |
| Troy Fawkes | Ontario |
| Troy Thibault | |
| Trple PC Ltd | Ontario |
| Tru Design Media | British Columbia |
| Tru Universe | |
| Truckadium | |
| TruckRight | |
| Trudell Medical international | |
| True inSite | Nova Scotia |
| True Market | Alberta |
| True North Marine | |
| True North Mortgage, Inc. | |
| True North SEO | |
| True Pixel Group | |
| True-E | |
| True802 Wireless, Inc. | Ontario |
| TrueCourse Communications, Inc. | Ontario |
| TrueNorth Quantum, Inc. | |
| TruePulse | Ontario |
| TrueWeb Media | |
| Trufla Technology | |
| TruLeaf | Nova Scotia |
| Trulioo | |
| Trump Systems, Inc. | Ontario |
| Trunexa, Inc. | |
| Trunkit | |
| Truro Techs 2 Go | |
| Trust Science, Inc. | |
| Trusted Dispatch, Inc. | |
| Trusted Marketing Services | |
| Trusted Technology, Inc. | British Columbia |
| TrustSSD | |
| Truxweb | |
| Trylon TSF, Inc. | Ontario |
| TryTec | Ontario |
| TS Solutions, Inc. | Ontario |
| TS2E | |
| TSG Computer Services | British Columbia |
| TSOT, Inc. | Ontario |
| TST | |
| Tsunami Solutions Ltd | British Columbia |
| Tsunami Technology Group, Inc. | Ontario |
| TTag Systems Corporation | Ontario |
| TTBA Group, Inc. | Quebec |
| TTL Tech Lab | |