TaxSlayer.com - Tax preparation software and proud sponsor of Dale Earnhardt, Jr.

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

ProSeries - Try the #1 professional tax preparation software chosen by more than 62,000 pros. ProSeries helps you make a meaningful difference for clients and file returns fast.

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

UltraTax CS - UltraTax CS is an all-in-one professional tax preparation software that works in a streamlined fashion with work papers and provides seamless document management.

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.