Mollie itself is hosted on GCP: https://cloud.google.com/customers/mollie
This is actually important to understand. What are the dependencies of your dependencies? I.e. if your goal is to be sovereign than knowing how far the turtles go, and who the turtles are, is quite important.
Also, TFA says:
> If you have used Stripe before, Mollie is the closest thing to that experience in the EU.
But Mollie does not even properly support recurring payments, a pretty important feature for SaaS. It does not track subscription state and does not retry failed payments.