The document discusses choosing the right enterprise service bus (ESB) for integration. It defines an ESB as a software product that assists with application integration by providing infrastructure for routing, translation, and other integration facilities. The document compares ESBs, integration frameworks, and integration suites. It then provides brief overviews of popular ESB tools, including Oracle Service Bus, Mule ESB, Fuse ESB, Talend ESB, and WSO2 ESB. It concludes by noting that choosing an ESB requires deciding between open source versus proprietary options and whether the full features of a suite are needed.