Here are 21 top free business listings in Canada:

1. Google My Business – This is one of the most important business listings as it appears in Google search results and Google Maps.
2. Bing Places for Business – This is Microsoft’s version of Google My Business and provides another opportunity for businesses to appear in search results.
3. Yelp – This is a popular review site where users can leave reviews about businesses. Yelp listings often appear in search results.
4. Yellow Pages – This is a Canadian business directory with over 1.6 million listings. Businesses can create a free listing or pay for a premium listing.
5. 411.ca – This is another popular Canadian directory with over 20 million Canadian business and residential listings.
6. Canada411.ca – This is a directory operated by Yellow Pages and provides phone number and address information for businesses and individuals.
7. HotFrog.ca – This is a local business directory with over 1.5 million listings in Canada.
8. Cylex.ca – This is a business directory that allows businesses to add photos, videos, and other multimedia to their listing.
9. Brownbook.net – This is a global business directory that allows businesses to create a free listing and add photos, videos, and other multimedia.
10. Foursquare – This is a location-based social network that allows users to discover and review businesses.
11. N49.ca – This is a Canadian business directory with over 2 million listings. Businesses can create a free listing or pay for a premium listing.
12. Yalwa.ca – This is a business directory that allows businesses to add photos, videos, and other multimedia to their listing.
13. Opendi.ca – This is a global business directory with over 5 million listings. Businesses can create a free listing and add photos, videos, and other multimedia.
14. ShopInCanada.com – This is a Canadian business directory that allows businesses to add photos, videos, and other multimedia to their listing.
15. SalesSpider.com – This is a business directory and social network for businesses.
16. Fyple.ca – This is a Canadian business directory that allows businesses to add photos, videos, and other multimedia to their listing.
17. CanadianBusinessDirectory.ca – This is a Canadian business directory that allows businesses to create a free listing or pay for a premium listing.
18. LocalSiteSubmit.com – This is a directory submission service that submits your business to multiple directories.
19. Go4WorldBusiness.com – This is a global business directory that allows businesses to create a free listing and connect with buyers and suppliers.
20. Lacartes.com – This is a global business directory that allows businesses to create a free listing and add photos, videos, and other multimedia.
21. GetFreeListing.com – This is a global business directory that allows businesses to create a free listing and add photos, videos, and other multimedia.