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RedNotebook vs Diarium: catalog facts
RedNotebook	Diarium
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Free to start; Diarium Pro is a one-time purchase per platform.
Windows, Linux	Windows, macOS, Android, iOS
Supports tags, templates, images and document exports.	No account needed to start Sync through your own OneDrive, Google Drive, Dropbox, iCloud or WebDAV
It is a local journal rather than a collaborative workspace.	Pro must be bought separately on each platform Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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