Years ago the company I worked for set up subscriptions and we used chargify. https://www.chargify.com https://www.chargify.com worked well enough and was pre

Years ago the company I worked for set up subscriptions and we used chargify. https://www.chargify.com https://www.chargify.com worked well enough and was pretty straight forward to set up for a couple of developers. We also wanted to set up one time payments (later), it wasn't a good fit for non-subscription billing. I think the back end charging was handled by braintree.