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ThiefMD vs Zettlr: catalog facts
ThiefMD	Zettlr
Free Free and open source under the GPL-3.0 or later licence.	Free The open-source software is available without a license fee. Hosting, hardware and…
Linux	Windows, macOS, Linux
Library is plain files on your own file system Export to PDF, ePub, docx and blog platforms via Pandoc	Combines document navigation with flexible export workflows.
Linux only Developers note it comes with no guarantees against lost files	Some publication formats require additional export dependencies.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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