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FluffyChat vs Quaternion: catalog facts
FluffyChat	Quaternion
Free Free and open source.	Free Free and open source.
Linux, Android, iOS, Web	Windows, macOS, Linux
End-to-end encryption with cross-signing and encrypted key backups UnifiedPush support for notifications without Google services	Native Qt interface instead of a web wrapper Works with any Matrix homeserver
Audio and video calls are still experimental Requires a Matrix account on some homeserver	Smaller project than the major Matrix clients such as Element Development pace is slower than larger clients
Downloadable app, Web application	Downloadable app
Open source	Open source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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