Filen vs NordLocker

Filen is a German cloud storage provider built around AES 256-bit client-side encryption and a zero-knowledge architecture, meaning the company itself cannot read stored files. Alongside standard file sync and storage, it offers a network drive that mounts cloud storage as a local drive, encrypted notes with markdown support, and end-to-end encrypted chat. Filen's applications are open source, and the service supports WebDAV and S3 protocols along with a headless CLI for developers and automation. It is positioned as a security-focused alternative for individuals and small teams who want full encryption without losing everyday usability.

NordLocker provides end-to-end encrypted cloud storage using AES-256, xChaCha20-Poly1305, and Ed25519 algorithms, built on a zero-knowledge architecture so the company itself cannot access stored files. It functions as both a local encrypted vault and a syncing cloud drive, letting users secure files locally and back them up to the cloud simultaneously.

• Strong zero-knowledge, client-side encryption on all plans including free
• Open source client applications increase transparency
• Low starting price for paid storage tiers
• Includes encrypted notes and chat beyond plain file storage

• True zero-knowledge, end-to-end encrypted storage
• Backed by the established Nord Security brand
• Functions as both local vault and cloud sync
• Free 3GB tier available

• Pricing is per-tier rather than fully flexible/custom storage amounts on lower plans
• Smaller company means less mature third-party integration ecosystem
• Encrypted architecture means no server-side file previews for some file types

• Introductory pricing renews significantly higher after the first term
• No native Linux desktop client
• 3GB free tier is small compared to general-purpose cloud storage competitors