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

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

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

Merchant Warrior - Merchant Warrior is an end-to-end payments gateway that provides merchant services via an online payment gateway, ISO management, and payment solution providing platform.

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.

Vapulus - Vapulus is an ultimate Payment solution for businesses that meet their specific needs.