Upodi VS Subscription Payments by involve.me

Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.

Rocket Money - Find your paid subscriptions and cancel with one click

Killbill - Open-Source Subscription Billing and Payment Platform

Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.

HonorCare - HonorCare is a web portal that makes it easy for you to make online medical payments in an accessible and authentic way.

Stripe Billing - A set of tools for billing and subscriptions