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.

SolidInvoice - SolidInvoice is simple to use online invoicing software that helps small businesses to get paid faster on time.

Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.

Upodi - Unified Commerce 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.