| LUCID, Inc. | |
| Lucidaco Consulting, Inc. | Ontario |
| Lucidea | British Columbia |
| Lucidfirst | Ontario |
| LUCIED Branding & Web Design Studio | |
| Lucila Orengo | Ontario |
| Lucinda Technology Solutions | Ontario |
| Luciole Télécom | |
| Lucky Mobile | |
| Ludia, Inc. | Quebec |
| Ludis Media | Quebec |
| Ludociels pour Tous | Quebec |
| Ludwig Design | Ontario |
| Luge Capital | Quebec |
| Lugg | Alberta |
| Lulu Labs | Quebec |
| LULU Software | Quebec |
| Luma Tech Solutions Canada Ltd | |
| Lumasonix, Inc. | Ontario |
| Lumed | Quebec |
| Lumen | |
| Lumen5 | |
| Lumerical Solutions, Inc. | British Columbia |
| Luminary Software Corporation | |
| Luminet Solutions | Quebec |
| Luminos | Ontario |
| Luminultra | |
| Lumionics, Inc. | Ontario |
| LumiR Lasers, Inc. | |
| Lumira Ventures | Ontario |
| Lumiset Studio | |
| Lumo | Manitoba |
| Luna IT Consulting, Inc. | |
| Lunarstorm | Ontario |
| Lunch Money | |
| Lune Rouge | |
| Lunenfeld-Tanenbaum Research Institute | |
| Lungpacer Medical, Inc. | |
| Lunik Intelligence Technologique | Quebec |
| Lunisity Software, Inc. | |
| Luscious Orange | Manitoba |
| Lusens | |
| Lush Concepts | Ontario |
| Luxcom Technologies, Inc. | Ontario |
| Luxia, Inc. | |
| Luxica Consulting Corporation | Alberta |
| Luxsonic Technologies, Inc. | |
| Luxuria + Apparatus | Ontario |
| LWS Design | Alberta |
| LX SIM | |