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Filen vs Koofr: catalog facts
Filen	Koofr
Freemium A free tier is available. More storage requires a paid plan or a lifetime purchase.	Freemium The first 10 GB are free; larger storage plans are paid.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS, Web, Browser extension
Client applications are open source and the encryption is zero-knowledge Data stored in Germany under EU data protection rules	EU-based storage with a no-tracking policy Connects other cloud accounts in one view
Smaller and newer than the established providers Some clients still carry rough edges	Free tier limited to 10 GB Requires an account on a hosted service
Downloadable app, Hosted service	Downloadable app, Web application, Hosted service, Browser extension
Open source	Closed source
License not stated	License not stated
Account needed	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 23, 2026

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