| GX Communication | Quebec |
| GxP Cellators | |
| Gyan.Consulting | |
| GYDesign | Alberta |
| g[squared] | Alberta |
| H&SS Solutions | Ontario |
| H10 AI | |
| H2nanO | |
| H2O Communication | Quebec |
| H2O Digital | Ontario |
| H2O Home to Overseas Conference | |
| H2R Business Solutions, Inc. | Ontario |
| H2Safety Services, Inc. | |
| H3 Creative, Inc. | Ontario |
| Habanero Consulting Group | Alberta |
| Habichat, Inc. | |
| Habit Creative Agency | Alberta |
| Habtech | Ontario |
| Hack the 6ix | Ontario |
| Hack the North | Ontario |
| Hacker Consulting | Ontario |
| HackerNest | Ontario |
| Hackfest | Quebec |
| Hacking Away, Inc. | Ontario |
| Hacking Health | Quebec |
| Hacklab.to | Ontario |
| Hackworks | |
| Hadamard | |
| Hagel Technologies Ltd | British Columbia |
| Haivision | Quebec |
| Hakim Electronics, Inc. | Ontario |
| Hal Nor Computers | Ontario |
| Halco Software Systems Ltd | British Columbia |
| Hale! Marketing Communications, Inc. | British Columbia |
| Halex | Ontario |
| Half-Baked Software, Inc. | British Columbia |
| Halfull Design Solutions | Ontario |
| Halifax Biomedical, Inc. | Nova Scotia |
| Halifax Computer Consulting Group, Inc. | Ontario |
| Halifax Innovation District | Nova Scotia |
| Halifax Partnership | Nova Scotia |
| Halifax Regional Municipality | |
| HaliHost.ca | Nova Scotia |
| Halion | |
| Hall Telecommunications | Ontario |
| Halo Trois-Rivières | |
| HaloHealth | |
| Haloo | |
| Halte 24-7 | Quebec |
| Halton's Regional Innovation Centre | Ontario |