FastSpring vs Square Payments: Which is best for you?

it was mediocre at best when things were working, they are currently costing me sales since they have turned off our account while they re-verify us.

Overall, Square Payments is a very good payment-processing solution for small-to-mid sized businesses, startups, side hustles, or anyone who values ease of setup and flexibility over deep customization or maximum cost efficiency.

The flat percentage-per-transaction model can be more expensive than custom merchant-account rates if you do a lot of sales, or have large-ticket items — so for high-volume businesses, fees may become significant.