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NeoChat vs Quaternion: catalog facts
NeoChat	Quaternion
Free Free and open source, developed by the KDE community.	Free Free and open source.
Windows, Linux	Windows, macOS, Linux
Fits into the KDE Plasma desktop Supports Spaces, polls, stickers and location sharing	Native Qt interface instead of a web wrapper Works with any Matrix homeserver
No voice or video calls No threads and incomplete end-to-end encryption support	Smaller project than the major Matrix clients such as Element Development pace is slower than larger clients
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Account needed	Account needed
Needs internet	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.