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Notesnook vs UpNote: catalog facts
Notesnook	UpNote
Freemium A free tier covers unlimited notes and sync across devices. A paid Pro subscription adds…	Freemium Free to download, with paid plans listed on the pricing page.
Windows, macOS, Linux, Android, Web	Windows, macOS, Linux, Android, iOS, Browser extension
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	Native apps for all major desktop and mobile systems Rich editor with Markdown, code blocks and attachments
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	Closed source Full feature set depends on a paid plan
Downloadable app, Web application	Downloadable app, Browser extension
Open source	Closed source
License: GPL-3.0	License not stated
Account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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