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Notesnook vs kardi notes: catalog facts
Notesnook	kardi notes
Freemium A free tier covers unlimited notes and sync across devices. A paid Pro subscription adds…	Free Free and open source under the GPL 3.0.
Windows, macOS, Linux, Android, Web	Windows, macOS, Linux, Android, iOS, Web
End-to-end encrypted on device with XChaCha20-Poly1305 and Argon2, so the service holds no readable data The full client codebase is published, which makes the privacy claim auditable	Encrypted notes readable only by you Clients for desktop, mobile and the web
An account is required; it is a sync service, not a local-only app Encryption means no server-side search, and losing your password loses the notes	Lost password or device means lost data Built and maintained by a single developer
Downloadable app, Web application	Downloadable app, Web application
Open source	Open source
License: GPL-3.0	License: GPL-3.0
Account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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