Information Services Group Inc. (ISG) has published new research highlighting the growing importance of subscription management software as enterprises increasingly adopt subscription-based business models. The report notes that companies are seeking adaptable and easily integrated platforms, particularly those featuring AI capabilities, to meet evolving customer demands and new purchasing options. ISG's Buyers Guides™ for Subscription Management provide comprehensive ratings and rankings of subscription management software, helping organizations select solutions that can scale with their needs and support future growth. The 2025 ISG Buyers Guides™ evaluated 27 leading software providers across five categories: Subscription Management, B2B Subscription Management, B2C Subscription Management, Subscription Billing, and Subscription Platforms. The guides are based on more than a year of independent research and are designed to help enterprises optimize their business and IT software investments. Providers assessed include major names such as Oracle, Salesforce, SAP, Stripe, Zuora, and others. Executive summaries of each report are publicly available, with full provider rankings and detailed findings offered by contacting ISG Software Research.