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EteSync-Knotes vs Iotas: catalog facts
EteSync-Knotes	Iotas
Free The application is free; EteSync hosting is paid, or you can run your own instance.	Free Free and open source under the GPL-3.0 or later.
Linux	Linux
Works with notes from the EteSync mobile app Supports multiple accounts and notebooks	Fast Nextcloud Notes sync with offline editing Optional Markdown with a formatted view and task lists
Requires an EteSync account Linux only	Notes are stored in SQLite, not plain files Export to PDF, ODT and HTML is still in preview
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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