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

PayAnywhere - PayAnywhere is a smart payment processing platform that comes with the modular methodology to streamline your business process with instant payments.

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

PayJunction - PayJunction powers mid- to large-scale businesses with smart payment processing, electronic signature capturing, and comprehensive multi-user multi-location reporting.

Zuora - Zuora creates cloud-based software on a subscription basis that enables any company in any industry to successfully launch, manage, and transform into a subscription business.

Bill 1st - Bill 1st is a leading Payment Gateway, ISO Management, and Payment Solution Provider that powers hundreds of enterprise businesses.