| Allie Sante | Care Homes | — |
| Allied Aluminum Products Compagny Inc | Aluminum Products | alliedaluminumproducts.com |
| Allied Services D'Entretien D'Edifices (Québec) Inc | Cleaning Services, Cleaning Service | alliedquebec.com |
| Allnet Maintenance | Home Improvement | facebook.com |
| Allo Ménage Pro | Cleaning Services, Cleaning Service | facebook.com |
| Allo Reno | Bathroom Renovations | allorenovations.ca |
| Allo Services | Appliance Repair & Service, Tout Commerces au détail | alloservices.ca |
| Allo'Tek | Computer Repair & Cleaning | allo-tek.com |
| Allo-salles | Auditoriums & Halls | 1001salles.com |
| Allo-Stop | Carpooling & Car Sharing | allostopmontreal.com |
| AlloFirm | Business Brokers | allofirm.com |
| Alloyco International Inc. | Tout Commerces au détail | alloyco.com |
| Allstate Assurance: David Varano | Car Insurance | agents.allstate.ca |
| Allstate Assurance: Filomena Galante | Car Insurance | agents.allstate.ca |
| Allstate Assurance: Joseph Kamal | Car Insurance | agents.allstate.ca |
| Allstate Assurance: Maria Campanelli | Car Insurance | agents.allstate.ca |
| Allstate Assurance: Wissam Deir | Car Insurance | agents.allstate.ca |
| Alltech Distributions | Alternators & Starters | dcalltech.com |
| Allure Bar & Lounge | Brasseries | facebook.com |
| Allure Eyelash extension's bar | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Allô mon Coco | Breakfast Restaurants | allomoncoco.com |
| Allô mon Coco | Restaurant Déjeuner - Brunch - Diner | Plateau Mont-Royal | Breakfast Restaurants | allomoncoco.com |
| ALMA Quartier Latin - Furnished Apartments | Apartments | thisismyalma.ca |
| ALMAZ | Alternative Health | — |
| Aloha Espresso Bar | Automobiles, Restaurants | alohaespressobar.com |
| Alou-Tech Électrique Inc | Electricians | facebook.com |
| ALP Microsystems | Tout Informatique et internet | alpmicro.com |
| Alpa Import & Export Corp. | Auto Part Manufacturers & Wholesalers | alpaimex.com |
| Alpen Secrets | Tout Entreprises et services | alpensecrets.com |
| Alpha Beauté | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Alpha Bêta Carrelage | Ceramic Tile Installers & Contractors | — |
| Alpha Candela Électrique Inc. | Electricians | alphacandela.ca |
| Alpha DNA inc. | Life Sciences and Health Technologies (LSHT) | alphadna.com |
| Alpha Electric | Electricians | — |
| Alpha Logistiques | Tout Entreprises et services | alphalogistiques.com |
| Alpha Natura | Physiotherapy | — |
| Alpha Scrap Metal | Scrap metal – recycling | — |
| Alphacad Inc | Computer Graphics Design & Animation | facebook.com |
| Alphacasting Inc. | Aerospace, Tout Entreprises et services | alphacasting.com |
| Alphakid Inc | Candles | alphakid.com |
| Alphamosaik | Computer Consultants | alphamosaik.com |
| Alphanet Services d'Entretien | Cleaning Services, Cleaning Service | facebook.com |
| Alphi Apparel Group | Tout Entreprises et services | alphi.ca |
| Alsago Entrepreneurs | Startup Ecosystem | alsagoentrepreneurs.com |
| Alset Cars | Automobiles, car Dealers | — |
| ALSIM | Aerospace | alsim.com |
| Alstom Transport Information Solutions | Information Technologies (IT) | telecite.com |
| Alt Art et Design | Commercial Artists | altartetdesign.com |
| Alt Art Et Design | Artists | — |
| Alta Maintenance Inc | Cleaning Services, Cleaning Service | facebook.com |
