However, people often say that Stripe's integrated solution outweighs the price (see other comments here). I disagree here. Sure, if you're just building an MVP, you want things to be up and running as quickly as possible, and you don't much care about processing fees. However, in the long term, if you run a sustainable SaaS over many years, these small amounts add up quickly. So, as an example, I do not use Stripe billing; I have my own subscription system. Because I looked at the amount I would be spending with them yearly, and realized that I prefer to have my own, building my own also gives me more control and flexibility. And independence, which matters quite a bit.