In our 35-criteria evaluation of recurring customer and billing management providers, we identified the nine most significant ones — Apttus, Aria Systems, BillingPlatform, Digital River, goTransverse, Oracle, SAP Hybris, Vindicia, and Zuora — and researched, analyzed, and scored them. This report and the associated downloadable tool show how each provider measures up and helps digital business strategy professionals choose the products that best fit their needs.