vs Trillian - WikiVS Pidgin vs Trillian From WikiVS, the open comparison website Jump to: navigation , search Pidgin Trillian VS http://pidgin.im/ http://www.ceruleanstudios.com/ Pidgin and Trillian are multi-protocol instant messaging clients. Trillian is closed source and, while Pidgin is free software, licensed under the GNU General Public License (GPL) version 2.