I think it's unlikely that Stallman would consider a hosted offering of Canvas to be 'free software'. But I agree with you that it can be both SaaS and free. A

I think it's unlikely that Stallman would consider a hosted offering of Canvas to be 'free software'. But I agree with you that it can be both SaaS and free. Although at that point I question what advantage free software gives you - you can't change it and you are still at the mercy of the hosting company since you aren't able to host it yourself.