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kardi notes vs ciphernotes: catalog facts
kardi notes	ciphernotes
Free Free and open source under the GPL 3.0.	Free Open source under the AGPL-3.0; the research does not mention paid plans.
Windows, macOS, Linux, Android, iOS, Web	Android, Self-hosted
Encrypted notes readable only by you Clients for desktop, mobile and the web	Notes are encrypted on the device before syncing Works offline with cloud sync
Lost password or device means lost data Built and maintained by a single developer	Small project with few users so far No tagged releases on GitHub
Downloadable app, Web application	Downloadable app, Self-hosted, Hosted service
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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