| Alibi | Quebec |
| Alice POS | Quebec |
| Alicia Ramirez | Manitoba |
| Alida | |
| Alien Informatique | |
| Aligned Software Solutions, Inc. | |
| Aligned Web Design | |
| Alignement | Quebec |
| Alika Internet Technologies, Inc. | Ontario |
| Alikhan Global Outsourcing | |
| Alimenthèque | Quebec |
| Alimentiv | Ontario |
| Alison K Consulting | Nova Scotia |
| Alister Creative Agency | |
| Alithya | Quebec |
| ALIX | |
| Alizem, Inc. | |
| Alkaloid Networks | British Columbia |
| Alkemi Network | |
| All Computer Services | Ontario |
| ALL IN | |
| All In Brand | Ontario |
| All In One Digital | |
| All Inclusive Marketing, Inc. | British Columbia |
| All Personnel Services, Inc. | |
| All Startups Info | |
| All Systems Go Marketing | Alberta |
| All The Way Up Media | |
| All-Net.ca | Manitoba |
| Allagma Technologies, Inc. | Quebec |
| Allainet | Ontario |
| Allan Joyner Productions | Ontario |
| Allan Lowe and Associates, Inc. | Alberta |
| Allan Pollett SEO Guru | Ontario |
| Allantra Learning Technologies Corporation | Alberta |
| Allard Hervieu Communication | Quebec |
| Allaris | Ontario |
| Allarta Life Science | Ontario |
| Allcan Distributors | Alberta |
| Allea Solutions Corporation | Ontario |
| Allegra | Ontario |
| Allegro Wireless Canada, Inc. | Ontario |
| Allen Ford | Ontario |
| Allen-Vanguard Corporation | Ontario |
| Allendale Electronics Ltd | Nova Scotia |
| Allentium Software | Alberta |
| Alleyne, Inc. | Ontario |
| Alliance Computers, Inc. | Ontario |
| Alliance Corporation | Ontario |
| Alliance HR Consulting | |