For Canadians, there are lots of alternatives, too.

I like Wealth Simple the best. Their business model is pay by donation when you're done (optional), or they try to funnel you into their investment platform. The tax service is basically a loss leader to try to get people to invest with them, and there's an ad screen near the end trying to get you to use your return to set up an investment account with them. Completely skipable in one click.

The CRA has a list of other options, too:

https://www.canada.ca/en/revenue-agency/services/e-services/digital-services-individuals/netfile-overview/certified-software-netfile-program.html