Freemium
plugandpay.com
Plug&Pay is an online payment platform that enables businesses to manage subscription billing, process one-time payments, and customize checkout pages with multi-currency support and analytics.
Free
Unschooler.me
Unschooler.me is a payment platform tailored for online educators and course creators, offering secure payment processing, subscription billing, and affiliate marketing integration.
Freemium
Owlbot
Owlbot is an AI-powered payment processing API that enables developers and businesses to securely accept and manage online payments, subscriptions, and fraud detection through a developer-friendly interface.