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

The Contractors Edge - Oilpatch contractor software.

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

NeoFirma - NeoFirma is a cloud-based drilling and production software that allows to capture, analyze and manage operation.

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.

Petroware - Petroware is an oil & gas software solution that provides features and tools like accounting & financial management, production management, land management and more.