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Mini Diarium vs Penzu: catalog facts
Mini Diarium	Penzu
Free Free and open source under the MIT licence.	Free Free to start, with unlimited entries at no cost.
Windows, macOS, Linux	Android, iOS, Web
AES-256-GCM encryption of every entry No network access or telemetry	Unlimited entries on the free plan Encryption and per-entry or per-journal locking
No sync between devices Name change announced, so the branding will shift	Journals are stored on Penzu's service rather than in files you own Built for journaling, not general note-taking
Downloadable app	Downloadable app, Web application, Hosted service
Open source	Closed source
License: MIT	License not stated
No account needed	Account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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