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Quaternion vs Fractal: catalog facts
Quaternion	Fractal
Free Free and open source.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Linux
Native Qt interface instead of a web wrapper Works with any Matrix homeserver	Native GTK interface that fits GNOME Written in Rust
Smaller project than the major Matrix clients such as Element Development pace is slower than larger clients	Linux only Needs a Matrix account
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
Account needed	Account needed
Needs internet	Needs internet
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.