Interested to know how saas startups that do subscriptions choose payment gateway when starting out. I know there is like one major payment gateway in stripe but interested in knowing peoples experiences and regrets and which they ultimately recommend.
It keeps things nice and tax compliant in my country, so that reduces overhead for me.
Apart from the major players like stripe and paypal, also consider checking out Lago.
https://www.ycombinator.com/companies/lago
Then they might look into something else than stripe if they have a terrible problem with stripe like having their funds locked for weeks or if they think they charge too much fees.