In our 36-criteria evaluation of the managed security services market, we identified the 11 most significant providers — Alert Logic, AT&T, BAE Systems, CenturyLink, Hewlett Packard Enterprise, IBM, SecureWorks, NTT Security, Symantec, Trustwave, and Verizon — and researched, analyzed, and scored them. This report shows how each provider measures up and helps security professionals choose the right partner to meet their unique business needs.