| Les Systèmes SOLITEK Systems, Inc. | Ontario |
| Les Technologies Easy | |
| Les Technologies Reweb | Quebec |
| Lescan.ca | Quebec |
| Lesia Design | Saskatchewan |
| Leslie Designs | Ontario |
| LestoreTech | |
| Let My Web | |
| Let's Get Digital | Ontario |
| Let's Get Optimized | |
| Lethbridge College | |
| Lethbridge College - Computer Information Technology | Alberta |
| Lethbridge Polytechnic | |
| Lethbridge Web Design | Alberta |
| Lets Nurture | New Brunswick |
| Lev-Fab | |
| Level 4 Technologies, Inc. | British Columbia |
| Level Hosting | Ontario |
| Leven Systems | |
| LeverageIT | |
| LeverageTek IT Solutions | |
| Levert Marketing | Ontario |
| Levio | Quebec |
| Levio Consulting, Inc. | |
| Lex Tec, Inc. | Ontario |
| Lexaria Bioscience Corporation | |
| Lexcom Systems Group | Saskatchewan |
| Lexicom | Alberta |
| Lexis Communications | Quebec |
| LexisNexis Canada | Ontario |
| Lexmark Canada, Inc. | Ontario |
| Lexop Solutions, Inc. | Quebec |
| Lexstart | |
| Lexum | Quebec |
| LFC Hosting | Saskatchewan |
| LFE Software, Inc. | Quebec |
| LG Electronics Canada, Inc. | Ontario |
| LGG Media | Ontario |
| LGIT | Quebec |
| LGM Solution | Quebec |
| LGR Internet Solutions | Saskatchewan |
| LGS | Quebec |
| LHC Technology Corporation | British Columbia |
| Li-Cycle | Ontario |
| Liaison College | |
| Liaisons réseau d'affaires | |
| LibelluleMonde, Inc. | Quebec |
| Libéo | Quebec |
| Liberated | Nova Scotia |
| Liberty | Quebec |