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Koofr Vault vs CryptSync: catalog facts
Koofr Vault	CryptSync
Freemium Included in all Koofr plans, including the free plan.	Free Free and open source.
Android, Web	Windows
Client-side, zero-knowledge encryption Included with the free Koofr plan	Keeps a plain folder and an encrypted folder in step automatically Works with any cloud sync client
Requires a Koofr account Only works with Koofr storage	Windows only Encrypts file by file rather than hiding folder structure in a container
Downloadable app, Web application	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0
Account needed	No account 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 1, 2026

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