EFSS is a crowded market with many vendors worthy of investigation. There are dozens of EFSS providers that may fit particular needs. Vendors with solid offerings that did not meet one or more inclusion criteria for this Forrester Wave include AeroFS (which uses a chat-channel approach to file sharing), CTERA, FinalCode (a relatively new vendor with success and backing in Asia), and ownCloud (one of the few open source options in the EFSS market). Avepoint offers SharePoint specific EFSS extensions, and Metalogix offers tools to bring consistent governance to cloud file sharing systems.