Amazon FPS vs ChargeOver: What are the differences?

Developers describe Amazon FPS as "Charge Amazon’s tens of millions of customers using their Amazon account". With Amazon Flexible Payments Service developers can accept payments on their website for selling goods or services, raise donations, execute recurring payments, and send payments. Amazon customers can pay using the same login credentials, shipping address and payment information they already have on file with Amazon. Amazon FPS supports the processing of payments using credit cards, bank accounts and Amazon Payments account balances to send or receive money. On the other hand, ChargeOver is detailed as "SIMPLE RECURRING BILLING SOFTWARE". Trusted recurring billing software helps subscription businesses collect credit, paypal, and ACH payments. Syncs with Xero & Quickbooks.

Amazon FPS and ChargeOver belong to "Payment Services" category of the tech stack.