It encompasses all the features that can help in managing subscriptions, invoicing and payments. Business Edition requires very minimal integration and can be used as a standalone solution to manage the subscriptions of your product.
It is suitable for ISVs that are looking for reengineering their product to a SaaS multi-tenant model or building a new SaaS product. Ultimate Edition is a 'one stop solution' covering all the aspects of developing, managing and operating your SaaS solution. The unique plug & play architecture of Cello allows even existing SaaS products to utilize the features.