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Thorium Reader vs crqt-ng: catalog facts
Thorium Reader	crqt-ng
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the GNU GPL version 2 or later.
Windows, macOS, Linux	Linux
Supports library imports, bookmarks and adjustable reading layouts.	Supports a broad range of ebook formats Can open books from ZIP archives
Format and protection support depend on the book being opened.	DRM-protected EPUB and MOBI are not supported
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-2.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 8, 2026

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