graphical, distributed, cross-platform IRC client

Quassel IRC, or Quassel, is an IRC client, introduced in 2008.[1] It is released under the GNU General Public License for GNU and Unix-like operating systems, OS X, and Microsoft Windows. Since the release of Kubuntu 9.04 (Jaunty Jackalope) Quassel is Kubuntu's default IRC client.[2][3] Quassel uses the Qt application framework.

Quassel IRC
Developer(s)Quassel IRC Team
Initial release0.3.0 August 27, 2008 (2008-08-27)
Stable release0.12.4 (May 17, 2016; 8 years ago (2016-05-17)) [±]
Written inC++
Operating systemOS X, Unix-like, Windows
TypeIRC client
LicenseGNU General Public License (version 2 or later)


  1. "Changelog" Archived 2013-09-28 at the Wayback Machine. Quassel-IRC.org.
  2. "Kubuntu 9.04 Out in the Wild". Kubuntu.org. 23 April 2009, retrieved 27 November 2009.
  3. Overa, Adam (October 19, 2009). "Large IRC Clients". Tom's Hardware.