Tor is a free software that helps to hide the identity while browsing sites online. Developed by The Tor Project Inc.
License: Open Source
Tor is designed for anonymity and privacy, using multiple servers to mask user identity, while UltraSurf focuses on bypassing censorship with faster speeds but offers less anonymity. Tor is more suitable for users needing deep privacy, while UltraSurf serves best for those seeking quick access to blocked content.