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Skribisto vs WonderPen: catalog facts
Skribisto	WonderPen
Free Free and open source under the GPL-3.0-only licence.	Paid Proprietary software sold through a purchase page on the developer's site.
Linux	Windows, macOS, Linux
Built specifically for writers Open source with a long development history	Unlimited-depth tree for chapters and documents Export to PDF, Word, EPUB and web pages, including whole books
Small project with a limited user community Linux is the documented platform	Proprietary and paid Cloud sync relies on the developer's own service
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License: Proprietary
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 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.