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Chatty vs Kaidan: catalog facts
Chatty	Kaidan
Free Free and open source under the GPLv3.	Free Free to download and use; developed within the KDE community.
Linux	Linux
SMS and MMS through the phone modem Matrix and XMPP in the same app	Works with any XMPP server instead of a single provider End-to-end encrypted messaging
Linux only XMPP support is optional and depends on libpurple	Developers note it still lacks some basic features Has known stability issues
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.