Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.
SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.
Look at that SaaS - Inspiration and resources for SaaS founders
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.
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies