Cryptomator encrypts individual files on your device before they sync to Dropbox, Google Drive, iCloud or any other cloud so the provider only ever sees ciphertext. It creates a “vault” that mounts like a normal drive; each file is encrypted separately and filenames are scrambled too, which keeps syncing efficient. The desktop apps are free and open source under the GPL and the code was independently audited by Cure53, which found no critical issues. Unlike whole-disk tools it is built specifically for cloud storage and works across Windows, macOS, Linux, Android and iOS. Reach for it when you want to keep using mainstream cloud storage without handing the provider your plaintext.
Cryptomator
Client-side encryption for files you keep in the cloud.
cryptomator.org
FreemiumOpen SourceE2E EncryptedAccepts CryptoWindowsmacOSLinuxAndroidiOSGermany
Pricing Desktop apps are free; the mobile apps charge a one-time unlock and a supporter certificate (€29.99 from 2026) adds extras like desktop dark mode.
Strengths
- Encrypts files before they reach the cloud
- Independently audited by Cure53
- Works on desktop and mobile
- Free and open source on desktop
Considerations
- Mobile write access needs a paid unlock
- Built for cloud files, not full disks
Listed in File Encryption
