In Forrester’s 51-criteria evaluation of hybrid² integration vendors, we identified the 14 most significant middleware providers. Instead of exploring only single products, we researched the functionality and interoperability of all relevant products from each vendor to understand their fit for hybrid scenarios between the cloud and on-premises as well as across the different traditional on-premises integration capabilities. This report details our findings about how well each vendor fulfills our criteria and where they stand in relation to each other to help CIOs select the right partner for their hybrid² integration endeavors.