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.

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

WooCommerce Subscriptions - WooCommerce Subscriptions is an extension that allows WooCommerce sites to create and manage products with recurring payments.

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

MONEI - MONEI lets you accept and manage the widest range of payment methods in a single platform so you can grow your e-commerce business faster.

FinancialForce Financial Management - FinancialForce.com provides cloud back-office applications for Salesforce CRM.