There has been a lot of confusion about the product positioning of the Connected Services Framework and BizTalk Server. I think the main reason is that CSF uses BizTalk Server for its primary provisioning scenario. However, there are some key differences based on the functional areas within a SaaS provider that easily distinguish the two. BizTalk Server focuses on the Order-to-Cash functional area while CSF focuses on the Service Network. There are components within the Service Network that BizTalk supports (and thus CSF leverages BizTalk), but over 80 percent of the Service Network requirements need additional functionality.
There are three main scenarios to help determine which product to use first or together: