Are Canadian visa agencies reliable?

For Canadian visa, it is better to find a professional agency, because Canada belongs to a developed country, and the visa has a certain probability of refusal. Even if the information is good, it is possible to refuse the visa. Therefore, if you don't know the whole process or information at all, it is definitely safer to find a third-party agency, but you must be careful when choosing an agency. It is best to find a professional agency to apply for a visa.