There are several online insurance brokers in Canada where you can get quotes from several Canadian car insurers. You only need to submit a generic form once, the online broker submits it to insurance companies and gets you quotes and offers. You can usually compare auto insurance rates, and eventually choose and book one without even leaving the broker website.
For a detailed info about car insurance quotes in Canada, you can refer to this Insurance-canada.ca page dedicated to online quotes.
Example of online insurence quotes websites:
Kanetix.ca is one of the most known online insurance brokers in Canada. It deals with 39 insurance suppliers.
Carinsurance.ca provides instant quotes from 7 insurance companies.