| Axper | Quebec |
| Axsera | Quebec |
| AXSES SCI | Nova Scotia |
| AXSource | |
| Axxium Vision | Quebec |
| Axxon Computer Corporation | Ontario |
| Axya | |
| AxyalCom, Inc. | Quebec |
| AXYS Technologies, Inc. | British Columbia |
| AyaNova | British Columbia |
| Ayima Ltd | British Columbia |
| Ayogo | British Columbia |
| Ayograph | Quebec |
| AyoWeb | Quebec |
| Aypa Power | |
| AYS Software | Ontario |
| AZ Blockchain | Ontario |
| Azimut POS Solutions | |
| AZIMUT Solutions Géomatiques | Quebec |
| Azor Biotek | |
| Azor Group | Alberta |
| Azorus | Nova Scotia |
| Aztec Internet | Ontario |
| Aztus | Quebec |
| B&B Solutions II, Inc. | Quebec |
| B&L Coaxial Connectors | Ontario |
| B-Temia | Quebec |
| B.B.D.S. Computers | Alberta |
| B.C. Communications | British Columbia |
| B.I.M. Ltd | Ontario |
| B.S.C. Technologies, Inc. | Ontario |
| B2B Connex | Ontario |
| B2B Cyber Secure | Quebec |
| B2B Cyber Secure | Quebec |
| B2B Wave, Inc. | Ontario |
| B2B2C, Inc. | Quebec |
| B3D Performance | Quebec |
| b4 Networks | Ontario |
| B4Checkin Ltd | Nova Scotia |
| BAASS Business Solutions, Inc. | Ontario |
| Babel | Quebec |
| Babel Média Communications | Quebec |
| Babysoft | Ontario |
| Back to the Game, Inc. | Quebec |
| Back-Bone Gear, Inc. | |
| Back2front | Ontario |
| Backbone | British Columbia |
| Backbone Angels | |
| Backbone IT Services Ltd | British Columbia |
| Backland Communications, Inc. | Ontario |