| Apps Complex | |
| Apps Developer Dot Ca, Inc. | |
| Appspring | |
| Appstastic Software, Inc. | Ontario |
| AppStudio | Ontario |
| Apption | Ontario |
| Apptrino | |
| AppVelocity | |
| AppVeyor Systems, Inc. | |
| Appwapp | |
| AprilAge, Inc. | Ontario |
| Apropos Marketing Communication | New Brunswick |
| ApSTAT Technologies, Inc. | Quebec |
| ApSTAT Technologies, Inc. | |
| APT-Logic | Ontario |
| Aptika | Quebec |
| Aptitude Digital | Nova Scotia |
| Aptum Technologies | Quebec |
| Aptus Systems, Inc. | British Columbia |
| APTX | |
| AQC Capital | |
| Aqua Data | Quebec |
| Aqua Intelligent Technology | |
| Aqua-Cell Energy | Ontario |
| Aquabits, Inc. | |
| Aquafort | |
| Aquanow | |
| Aquantix | |
| Aquatic Informatics | British Columbia |
| Aquilon Software | British Columbia |
| Aqurus | Alberta |
| AR Communications, Inc. | Ontario |
| ARA Robotics | |
| Aradial Technologies | Ontario |
| Aradial Wi-fi Billing Technologies Ltd | Ontario |
| Aralco Point of Sale Systems | British Columbia |
| Aratec | |
| Arbault, Inc. | Quebec |
| Arbrio | |
| Arbuckle Media, Inc. | |
| Arbutus College | |
| Arbutus Software, Inc. | British Columbia |
| ARC Business Solutions | Alberta |
| ARC Clean Technology, Inc. | |
| ARC Medical, Inc. | British Columbia |
| ARC Systems | |
| Arcacia | Ontario |
| Arcane Digital, Inc. | Ontario |
| Arcane Technologies, Inc. | Quebec |
| Arch Visual Communications, Inc. | Alberta |