Secure end-to-end encrypted messaging - from your Desktop or Laptop.

Downloads for Windows

The latest builds can be found on our builds server. Scroll down to find the latest build. Use either an installer (.exe) or a .zip file for a portable version. Both 32-bits (x86) and 64-bits (x64) are available.

Downloads for Mac OSX

The latest build in form of a .DMG can be found on our builds server. Additionally, openMittsu is available using homebrew: Just tap and install with brew tap blizzard4591/homebrew-openMittsu and brew install openmittsu.

Downloads for Debian and Ubuntu

Check out our apt package repository! Scroll down to find a short How-To on using the repository, or install the packages directly.

Installing from Source

Take a look at the steps detailed on our GitHub page.