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Sebastian Stenzel 4e2122a64f
Merge pull request #1050 from zhouer/close_request
3 days ago
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3RD PARTY LICENSES Changed license to GPLv3 [ci skip] 2 years ago
main Merge pull request #1050 from zhouer/close_request 3 days ago
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.travis-deploy-release.tmpl.json updated build config 11 months ago
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Build Status Known Vulnerabilities Codacy Badge Twitter Crowdin Latest Release Community

Supporting Cryptomator

Cryptomator is provided free of charge as an open-source project despite the high development effort and is therefore dependent on donations. If you are also interested in further development, we offer you the opportunity to support us:

Silver Sponsors



Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud.

Download native binaries of Cryptomator on or clone and build Cryptomator using Maven (instructions below).


  • Works with Dropbox, Google Drive, OneDrive, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory
  • Open Source means: No backdoors, control is better than trust
  • Client-side: No accounts, no data shared with any online service
  • Totally transparent: Just work on the virtual drive as if it were a USB flash drive
  • AES encryption with 256-bit key length
  • File names get encrypted
  • Folder structure gets obfuscated
  • Use as many vaults in your Dropbox as you want, each having individual passwords
  • One thousand commits for the security of your data!! :tada:


  • 256-bit keys (unlimited strength policy bundled with native binaries)
  • Scrypt key derivation
  • Cryptographically secure random numbers for salts, IVs and the masterkey of course
  • Sensitive data is wiped from the heap asap
  • Lightweight: Complexity kills security


  • HMAC over file contents to recognize changed ciphertext before decryption
  • I/O operations are transactional and atomic, if the filesystems support it
  • Each file contains all information needed for decryption (except for the key of course), no common metadata means no SPOF

Security Architecture

For more information on the security details visit



  • JDK 11 (we recommend to use the latest version)
  • Maven 3
  • Optional: OS-dependent build tools for native packaging (see Windows, OS X, Linux)

Run Maven

cd main
mvn clean install -Prelease

This will build all the jars and bundle them together with their OS-specific dependencies under main/buildkit/target. This can now be used to build native packages.

Start Cryptomator

If you unzip the buildkit for your OS, you will find a launcher script with some basic settings. You might want to adjust these to your needs. To start Cryptomator, simply execute the launcher script from a terminal, e.g., if you’re on a Linux system.


This project is dual-licensed under the GPLv3 for FOSS projects as well as a commercial license for independent software vendors and resellers. If you want to modify this application under different conditions, feel free to contact our support team.