| Air Transport Association of Canada | |
| Air Whistle | Ontario |
| Airbly, Inc. | Prince Edward Island |
| Aircraft Maintenance Systems | |
| Airdrie Computer Ltd | Alberta |
| AirdrieWeb.ca | Alberta |
| AireNet Internet Solutions | Alberta |
| airG | British Columbia |
| AirIQ, Inc. | Ontario |
| AirMatrix | Ontario |
| AirMed Canada Systems, Inc. | British Columbia |
| Airos Group | Ontario |
| Airsource | Saskatchewan |
| Airspeed Consulting | Manitoba |
| Airtel Wireless Ltd | Alberta |
| AirTest Technologies, Inc. | British Columbia |
| AIRY:3D | Quebec |
| AiTerra | |
| AIVIA, Inc. | Alberta |
| AiWood Digital | Ontario |
| Aizan Technologies, Inc. | Ontario |
| AJ Computer Solutions | Ontario |
| AJ2000 | Ontario |
| Ajah | |
| Ajax Sound Studio | |
| Ajaxify | Ontario |
| AJEFO | |
| AKA Broker | Ontario |
| Akamina Technologies | Ontario |
| Akendi | Ontario |
| Akeni | Ontario |
| Akinox Solutions, Inc. | |
| Akira Studio | Ontario |
| Akiri Consultants, Inc. | Quebec |
| Akova | Quebec |
| AKP Solutions, Inc. | |
| Akri Consulting | Ontario |
| Akrö Design, Inc. | Quebec |
| Akrons | |
| Akrons Web Development Corporation | |
| AKS Computer Sales and Services | Alberta |
| Akseera Pharma Corporation | British Columbia |
| Aksel | Ontario |
| Aksure Networks Corporation | Ontario |
| AKTe Web Design | Quebec |
| AKTIV Software Corporation | British Columbia |
| Akvis | British Columbia |
| AL Software Consulting | |
| Al-Software | British Columbia |
| AL6400.com | British Columbia |