qutIM is free and open-source multiprotocol (ICQ, Jabber, Mail.Ru, IRC, VKontakte) instant messenger. Developed by Rustam Chakin & Ruslan Nigmatullin
License: Open Source
Psi is known for its user-friendly interface and PGP encryption, making it ideal for users prioritizing security and ease of use. In contrast, qutIM is an open-source, lightweight client with extensive plugin support, appealing to users who prefer customization and a broader protocol range.