| Tenn-Tek, Inc. | Ontario |
| TenScores | Quebec |
| TenSpeed Technologies | |
| Tenstorrent, Inc. | |
| Tentaq | |
| Tenthline, Inc. | Ontario |
| Tenzing | Ontario |
| Tenzing Interactive | Ontario |
| Tenzor Ltd | |
| Tera-Byte | Alberta |
| Terabit | Ontario |
| Teradici | British Columbia |
| Teradocs Systems, Inc. | Ontario |
| TeraGo Networks, Inc. | Ontario |
| Teralys Capital | Quebec |
| TeraMach Technologies, Inc. | Ontario |
| Teranet | Ontario |
| Terasol Computers Solutions, Inc | Alberta |
| Teraspan Networks | British Columbia |
| TeraXion | Quebec |
| Terentia, Inc. | |
| Terepac | Ontario |
| Terminal Systems International, Inc. | Saskatchewan |
| Terminotix, Inc. | Ontario |
| Tero Consulting Ltd | British Columbia |
| Terra Consultants Ltd | Prince Edward Island |
| Terra Excel Drones | |
| Terra Informatica Software | British Columbia |
| Terra Media Design Ltd | Ontario |
| Terra Software | Alberta |
| Terra Viva, Inc. | Ontario |
| Terracad Geoscience | British Columbia |
| Terracor Business Solutions | |
| Terragon Technologies, Inc. | |
| Terramera, Inc. | |
| Terranova Security | Quebec |
| Terranova WW Corporation | Quebec |
| TerraSense Analytics | |
| Terraspec | |
| TerraZero Technologies, Inc. | |
| Terrestar Solutions, Inc. | |
| Terrestrial Energy, Inc. | |
| TerrisGPS | Quebec |
| Territorial | Saskatchewan |
| Tervene | Quebec |
| TESER | |
| Tesera Systems | Alberta |
| Tesla Computers | Ontario |
| tesserNet Systems, Inc. | Alberta |
| TestDEN.com | British Columbia |