Threema OnPrem combines proven cryptography with a self-hosted deployment concept – enabling secure communication at the highest level and complete data control.
Protection against cyber threats: isolated infrastructure protects against government trojans, targeted attacks, and espionage
Highest compliance standards for public sector requirements: meets the strictest security regulations for handling classified information
End-to-end encryption: all content is consistently encrypted
Zero-knowledge architecture: effectively prevents surveillance and targeted attacks
Yes. Threema OnPrem Beta is free and open-source software released under the AGPL-3.0 license.
What is the latest version of Threema OnPrem Beta?
The latest version is 2.0.68.0, released on Sep 14, 2026.
Is it safe to download Threema OnPrem Beta?
The download button links to the official installer published on releases.threema.ch, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 3b862b5bad17adc87c4edf481ce9a1d7311fbbd2928f23ad36463fb263da1d1e.
Which Windows versions does Threema OnPrem Beta support?
Threema OnPrem Beta requires Windows 10 version 21H2 or later and is available for 64-bit (x64) systems.
How do I uninstall Threema OnPrem Beta?
Open Settings › Apps › Installed apps, find Threema OnPrem Beta and select Uninstall. From the command line, run winget uninstall --id=Threema.Threema.OnPrem.2 -e.
Alternatives to Threema OnPrem Beta
Other Office Suites programs for Windows from different developers.
