(In order of ease of implementation) Stripe, Braintree, Authorize.net TBH though - Authorize.net was a pretty good experience overall (esp. considering when I

(In order of ease of implementation) Stripe, Braintree, Authorize.net TBH though - Authorize.net was a pretty good experience overall (esp. considering when I had to implement it years ago). I'd still take their 10-year-old API over Zuora's nowadays. The docs were a bit rough, but nothing you couldn't sort out with some trial and error and brute forcing of a few weird payloads to their sandbox environment. :)