Chargify. JUST DON'T DO IT! It's very limiting, the api sucks, and it's expensive. We got locked in by a dev before I was a part of things and I think before Stripe (maybe not.) Either way; just don't.
1000% this. We started using chargify before Stripe when there were very few options and they were cheap.
They increased pricing and added a bunch of features we dont use, plus our payment processor (DPS now Windcave) refuse to export our customer card data.
So for the past few years we are slowly migrating people away as they update their card details, but its been a frustrating experience.
