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

Google Marketing Platform - Google's unified and improved marketing and analytics tools.

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

AdRoll - AdRoll is a leader in retargeting display advertising. Draw the right people with the right strategies.

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.

Smartly.io - Smartly.io is the leading Facebook ad optimization solution for agencies and performance marketers