| Aldea Solutions Inc | Information Technologies (IT) | aldea.tv |
| Aldeavision Inc. | Tout Entreprises et services | aldea.tv |
| ALDO Accessoires | Air Conditioning Systems & Parts | aldoshoes.com |
| Aldo Construction | Tout Entreprises et services | aldoconstruction.ca |
| Aldon Renovations | Home Improvement | — |
| Alec Stephani | Tout Arts et divertissement | alec5.com |
| Alerte Aménagement Paysager | Landscaping | alerteamenagementpaysager.com |
| Alerte fissure inc. | Tout Entreprises et services | alertefissure.qc.ca |
| Alerte-Café Services Techniques Inc. | Coffee Machines & Roasting Equipment | alertecafe.com |
| Alessandra's Beauty Studio | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Alethes Architecture | Architects | alethesarchitecture.com |
| Alethia Biotherapeutics Inc. | Life Sciences and Health Technologies (LSHT) | alethiabio.com |
| Alethia Biothérapeutiques Inc. | Life Sciences and Health Technologies (LSHT) | alethiabio.com |
| Alex Breton Electrique Inc | Electricians | alexbretonelectrique.com |
| Alex Dupuis | Health and Beauty | — |
| Alex Mecanique | Car Repair | facebook.com |
| Alex Média Services Inc | Circular & Sample Distribution | alexmediaservices.com |
| Alex pneu et mécanique | Tout Commerces au détail | pneubedard.ca |
| Alex Pneu et Mécanique-Alliance Les professionnels Du Pneu | Car Repair | — |
| Alex Pneu et Mécanique-Détaillant Autorisé Michelin | Car Repair | alex.ca |
| AlexAM Aménagement Paysager | Landscaping | — |
| Alexander Lewis | Car Insurance | facebook.com |
| Alexander Rivera Massothérapeute | Massage Therapy | facebook.com |
| Alexander Technique Montreal | Alternative Health | alexandertechnique-montreal.com |
| Alexandra Esthétique | Beauty & Fitness, Hairdressers & Beauty Salons | vagaro.com |
| Alexandra's Nostalgic Memorabilia | Antique Dealers | — |
| Alexandre Bernier Architecte | Architectural Technologists | ab-architecte.ca |
| Alexandre et fils | Breakfast Restaurants | chezalexandre.com |
| Alexandre-Alexander Enr | Book Stores | alexanderpress.com |
| Alexandria Créations | Baskets | — |
| Alexandrium Fine Art Inc | Artists | — |
| Alexis Brosseau Infographie | Computer Graphics Design & Animation | — |
| AlexSam - Pro Inc | Cleaning Services, Cleaning Service | menagersmontreal.ca |
| Alfa Ménage | Cleaning Services, Cleaning Service | entretienmenagercommercial.info |
| Alfa Ordinateurs | Answering Machines & Equipment | alfa-electronique.com |
| Alfa Rococo | Tout Arts et divertissement | alfarococo.com |
| Alfa Romeo Montreal | Tout Informations générales | alfamontreal.info |
| ALFID Résidentiel | Tout Entreprises et services | alfidlouer.ca |
| Alfohno Pizzaria | Pizza & Pizzerias | — |
| Alhadj | Astrologers & Psychics | consultationalhadj.com |
| Ali Ebéniste | Cabinet Makers | facebook.com |
| Ali Jeans | Boutiques | — |
| Ali Si-Salem | si | — |
| Alibec Auto Parts Inc | Garage Auto | — |
| Alice and smith | Information Technologies (IT) | aliceandsmith.com |
| Alid'art Créations Enr | Arts & Crafts Classes & Schools | — |
| Alien8 Recordings | Tout Entreprises et services | alien8record.com |
| Aligned Capital Partners inc. | Computer Data Recovery | facebook.com |
| Alignement M L Enrg | Garage Auto | — |
| Alignements Western | Car Repair | alignementswestern.ca |
