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GNU TeXmacs vs Mellel: catalog facts
GNU TeXmacs	Mellel
Free Free software, part of the GNU project.	Paid Paid application sold through the developer's web store, with occasional discounts.
Windows, macOS, Linux	macOS
WYSIWYG editing of mathematical formulas Front end for computer algebra and statistics systems	Designed for long academic and technical documents Native builds for Apple Silicon and Intel Macs
Not based on LaTeX, so conversion to and from LaTeX is not always exact Interface differs from common word processors and takes learning	macOS only on the desktop Paid software with no free tier mentioned
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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