Our backend team dreaded adding another payment method, but integrating [Paykassma payment solutions](https://paykassma.com/) turned out to be painless. They offer iFrame, API, or Postback — we went with the API and had test transactions running in under two hours. The documentation is clear, and the sandbox environment let us debug properly. Also handles recurring payments for our SaaS subscriptions. If your devs are tired of clunky gateways, give this one a look.