| Tom Harris | British Columbia |
| Tom McLaughlin | Alberta |
| Tom Trottier, MBA, ATM-G, CL | Ontario |
| Tomahawk Technologies, Inc. | Ontario |
| Tomauri, Inc. | Ontario |
| Tomkorp Computer Solutions, Inc. | Manitoba |
| Toner Warehouse, Inc. | Ontario |
| TonerParts | British Columbia |
| Tonertech | British Columbia |
| Tonik Webstudio | Quebec |
| Tonton | Quebec |
| Toodledo | |
| Tool Inventory Software | Alberta |
| Tooleweb Computer Solutions | Alberta |
| Tooly | |
| Tooly.ai | Quebec |
| Toon Boom | Quebec |
| Toonie Hosting | Ontario |
| Tootelo Innovation, Inc. | Quebec |
| Top 4th GL | Quebec |
| Top Aces, Inc. | |
| Top Canada SEO Web Design | |
| Top Computer | Ontario |
| Top Dog Social Media | British Columbia |
| Top Down Ventures | |
| Top Floor Computer Systems Ltd | British Columbia |
| Top Hat | |
| Top Hat Monocle, Inc. | Ontario |
| Top Priority Systems | |
| Top Producer Software, Inc. | British Columbia |
| Top Renergy, Inc. | |
| Top Search Result | Prince Edward Island |
| Top Shelfmedia | Alberta |
| Top Tech Solution | Quebec |
| Top Web Games | Ontario |
| Top Web3 Jobs | |
| TopDesk USA, Inc. | Ontario |
| TopDevs | Ontario |
| Topdraw | Alberta |
| Topic | Ontario |
| Topology Health | |
| Topping Electronics, Inc. | Ontario |
| TopRank.Domains | |
| TOPS Office | British Columbia |
| TopShelf SEO | |
| Topsky, Inc. | Ontario |
| Torch Media | New Brunswick |
| TorCHI Toronto Region Computer Human Interaction | Ontario |
| Torgon | Ontario |
| TorIX - The Toronto Internet Exchange | Ontario |