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Simplenote vs Notesnook: catalog facts
Simplenote	Notesnook
Free The software is free under its open-source licence. Hosting, hardware and external…	Freemium A free tier covers unlimited notes and sync across devices. A paid Pro subscription adds…
Windows, macOS, Linux, Android	Windows, macOS, Linux, Android, Web
Syncing is free and unlimited across every platform, notes keep a version history, and the whole thing stays…	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
There is no encryption of note contents on Automattic's servers, and no attachments, folders or rich formatting.	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
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-2.0	License: GPL-3.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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