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Threema OnPrem

Threema OnPrem

Self-Hosted Business Messaging

2 ratings
1 review
🔧 Utilities
🌐 Social Networking
Free

Details

Released
December 20, 2021
Updated
October 12, 2026

Features

Developer

Threema GmbH
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About

This secure messaging solution offers organizations complete data sovereignty by hosting on their own servers. It provides end-to-end encrypted communication for teams, including voice and video calls, and secure file sharing, all protected by PIN or fingerprint.

✓Self-hosted solution
✓Complete data sovereignty
✓End-to-end encrypted calls
✓Secure file sharing
✓Cross-platform compatibility
✓PIN/fingerprint chat protection
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What's New in Threema OnPrem

7.4.2

October 12, 2026

•Fixed a crash that could occur when launching the app Threema OnPrem 7.4.1 • Various improvements in relation to Threema OnPrem calls Threema OnPrem 7.4 • Added an alphabetical index scroller to the contact list when starting a new chat • Added swipe actions for search results in the contact list • Improved audio controls in calls, voice messages, and media playback • Improved Threema calls and features related to Threema OnPrem 2.0 for desktop • Fixed a bug that caused a warning about multiple connections to be shown incorrectly • Fixed a bug that prevented the typing indicator from disappearing • Fixed various bugs and crashes in relation to calls • Other improvements and various bug fixes • Note: Starting with the next major app version, iOS 17 will no longer be supported

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User reviews

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Migration auf anderes Gerät unmöglich

wenn man einmal auf einem Gerät angemeldet ist und das Gerät wechseln möchte, geht das nicht. Die App bietet zwar den Export der ID unter Passwortschutz an, damit man (angeblich) auf dem neuen Gerät die ID wiederherstellen kann und dieser Export funktioniert auch selbsterklärend einfach. Aber auf dem neuen Gerät bietet die App gar keine Möglichkeit der Wiederherstellung. Es gibt ausschließlich die Anmeldemaske für die Eingabe des Benutzernamens und des Passworts und mit dem kann man sich nicht mehr anmelden, da man den Schlüssel überhaupt nirgend eingeben kann (geschweige denn das Passwort dazu).

Außerdem bleibt Schleierhaft, warum man bei der erstmaligen Anmeldung (also bei der Erstellung der ID) einen neuen Benutzernamen erhält, obwohl man ja vom Betreiber des Server bereits einen eindeutigen hat. Sowas stiftet bei der Archivierung der Zugangsdaten nur reichlich Verwirrung.
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FAQ

What is Threema OnPrem?

Threema OnPrem is a self-hosted communication solution designed for organizations that require the highest level of security and data sovereignty. It allows companies to host their own independent communication environment on their servers.

How does Threema OnPrem ensure data sovereignty?

Data sovereignty is achieved through 100% self-hosting. All communication data resides on your company's own servers, giving you complete control and eliminating reliance on third-party infrastructure.

What security features does Threema OnPrem offer?

It utilizes Threema's proven security architecture with end-to-end encryption for all messages, voice, and video calls. Chats can be further protected with a PIN or fingerprint.

Can I use Threema OnPrem on multiple devices?

Yes, Threema OnPrem supports cross-platform use. You can access it via its mobile app, a desktop application, and a web client, ensuring seamless communication across different devices.

Is Threema OnPrem suitable for government agencies and police forces?

Yes, the application is specifically highlighted as ideal for government agencies, police forces, and industrial companies due to its unmatched confidentiality and complete data sovereignty.

Does Threema OnPrem have ads?

No, Threema OnPrem is ad-free. As a self-hosted solution focused on enterprise security, it does not display advertisements to users.

What is the rating for Threema OnPrem?

Threema OnPrem has a perfect rating of 5.0 stars based on 2 user reviews, indicating high user satisfaction with its features and performance.

How do I set up Threema OnPrem?

Before using the app, Threema OnPrem must be set up on your company's server. More detailed information and setup guidance can be found on the official Threema website.