Which companies are the top 10 Managed Service Providers for 2013?

EarthLink, Logicalis, NSPI, Longview Systems, MindSHIFT Technologies, Datapipe, All Covered, Brennan IT, Liason Technologies and Iomart Group are the top 10 managed service providers of 2013 according to the MSP Mentor website. They have ranked a list of 501 service providers.