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

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