| Leadmotion | |
| LeadPulse | |
| Leads & Designs | |
| Leads Pro | |
| LeadSift | Nova Scotia |
| LeadsOnline | |
| LeadX Marketing | |
| Leaf Design, Inc. | Ontario |
| Leafcom Corporation | Ontario |
| Leafsprout | Ontario |
| League | Ontario |
| League of Innovators | |
| Lean Automation | |
| Lean On Me Business Consulting, Inc. | British Columbia |
| Lean Team | |
| Leankor | |
| Leanpub | British Columbia |
| Leap Conseil | |
| Leapbeyond Solutions | Ontario |
| Learndot | British Columbia |
| Learning Library, Inc. | Ontario |
| Learning Tree International | Ontario |
| LearnSphere | New Brunswick |
| Leclerc Communication | |
| LED Smart, Inc. | |
| Ledatech | Quebec |
| LeddarTech, Inc. | |
| LedgerDocs | |
| Ledning Loop | |
| Lee Graphics | |
| Leebly Technologies | |
| Leed | |
| Leelatechnologies | Ontario |
| LEEROY | Quebec |
| LeesLittleComputerService | British Columbia |
| LEESTA Industries Ltd | |
| LeeWay Marine | |
| Left Right Minds | British Columbia |
| Legacy Computers and Parts | Ontario |
| Legacy Designs | Ontario |
| LegacyX | |
| Legal Matters Software, Inc. | British Columbia |
| Legalboards | |
| Legault Électronique | |
| LegoGreen IT Consulting, Inc. | Ontario |
| LegUp Computing, Inc. | Ontario |
| Lekla | Quebec |
| Lemay.ai | Ontario |
| Lemieux Bédard Communications, Inc. | Quebec |
| Lemon Productions | Saskatchewan |