GNUnet is a free software framework for decentralized, peer-to-peer networking and an official GNU package. Developed by Christian Grothoff
License: Open Source
Psiphon is primarily focused on providing a user-friendly solution for bypassing internet censorship with a straightforward interface and multiple platform support. In contrast, GNUnet emphasizes decentralization and privacy, offering a more complex but secure peer-to-peer networking solution.