In Forrester's 31-criteria evaluation of information security consulting service providers, we identified the 13 most significant firms in the category — Accenture, Atos, BAE Systems, Dell SecureWorks, Deloitte, EY, HPE, IBM Security Services, KPMG, Protiviti, PwC, Verizon and Wipro — and analyzed their offerings. This report details our findings about how well these consultancies fulfill our criteria, and where they stand in relation to each other, to help security leaders select the right partner for their initiatives.