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LyX vs Mellel: catalog facts
LyX	Mellel
Free Free and open source under the GPL.	Paid Paid application sold through the developer's web store, with occasional discounts.
Windows, macOS, Linux	macOS
LaTeX typesetting quality without writing LaTeX syntax Excellent equation editor with both visual and keyboard entry	Designed for long academic and technical documents Native builds for Apple Silicon and Intel Macs
Its own file format rather than plain LaTeX, which complicates collaboration Requires a TeX distribution installed separately	macOS only on the desktop Paid software with no free tier mentioned
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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