MoonClerk is described as 'An all-in-one solution for accepting recurring and one-time payments online' and is a payment processing service in the business & commerce category. There are more than 25 alternatives to MoonClerk, not only websites but also apps for a variety of platforms, including SaaS, iPhone, Android and iPad apps. The best MoonClerk alternative is Payoneer. It's not free, so if you're looking for a free alternative, you could try Chargebee or Melio. Other great sites and apps similar to MoonClerk are Bill.com, Recurly, PayForm and Chargify.