| Hentero, Inc. | Alberta |
| Herb Sutter | Ontario |
| Herely | |
| Heritage College | |
| Heritage College & Seminary | |
| Herjavec Group | Ontario |
| Hermary Opto Electronics, Inc. | British Columbia |
| Herne Data Systems Ltd | Ontario |
| Hero Technical Solutions, Inc. | Ontario |
| Héroux-Devtek | |
| Hervana Vancouver | |
| Herzing College | |
| Hess Aerospace | |
| Hetman | |
| Heureux IT | |
| Hexap Solutions | |
| Hexfit | |
| Hexmind | Quebec |
| Hexonet Services, Inc. | British Columbia |
| Hexoskin Wearable Body Metrics | Quebec |
| Heyday Technologies, Inc. | Quebec |
| HeyOrca | |
| HeyOrca! | Newfoundland and Labrador |
| HeyTony | |
| HGC Technologies, Inc. | |
| HGP Technologies | Quebec |
| HHS Software Corporation | Ontario |
| Hi Mama, Inc. | Ontario |
| Hi Tech Cell, Inc. | Ontario |
| Hi Tech-C Systems, Inc. | Ontario |
| Hi-Fi Centre Ltd | British Columbia |
| Hi-Tech Business Solutions | Alberta |
| Hi-Tech Homes | Ontario |
| Hi-Tech Paradigm Solutions, Inc. | |
| Hide Folder | British Columbia |
| Higgs Software Services, Inc. | |
| High Country Web Design | Alberta |
| High Go | |
| High IQ Soft Corporation | British Columbia |
| High Q Technologies, Inc. | |
| High Speed Crow, Inc. | Manitoba |
| High Tech Communications, Inc. | Ontario |
| High Tech Genesis | |
| High-Touch Communications, Inc. | Quebec |
| HIGH5 | |
| HighCloud Solutions Télépilotées, Inc. | |
| HighCriteria | Ontario |
| Higher Design, Inc. | Prince Edward Island |
| HigherMe | |
| Highgate Systems | |