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Threema OnPrem

Threema OnPrem

Self-Hosted Business Messaging

3 ratings
1 review
🔧 Utilities
🌐 Social Networking
Free

Details

Released
December 20, 2021
Updated
November 2, 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. The platform ensures confidentiality for sensitive government and industrial communications.

✓Self-hosted for complete data sovereignty
✓End-to-end encrypted communication
✓Secure voice and video calls
✓Confidential team, group, and project chats
✓Secure file and document exchange
✓Cross-platform use (mobile, desktop, web)
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What's New in Threema OnPrem

7.5.2

November 2, 2026

• Note: This version requires iOS 18 or higher • Improvements in relation to notifications of group calls • Improvements in relation to calls • Improvements in relation to voice messages • Various performance improvements • Various improvements for devices running iOS 27

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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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Sstoamandl

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FAQ

What is Threema OnPrem?

Threema OnPrem is a self-hosted messaging solution designed for organizations that require the highest levels of security and data sovereignty. It allows companies to host their communication infrastructure on their own servers, ensuring complete control over their data.

How secure is Threema OnPrem?

Threema OnPrem utilizes Threema's proven security architecture, offering end-to-end encryption for all communications. This ensures that only the sender and intended recipient can access the content of messages, calls, and shared files.

Can Threema OnPrem be used on multiple devices?

Yes, Threema OnPrem supports cross-platform use. Users can access the service via a mobile app on their smartphone, a desktop application, and a web client, ensuring seamless communication across different devices.

What kind of communication does Threema OnPrem support?

Threema OnPrem supports confidential communication within teams, groups, and projects. It includes end-to-end encrypted voice and video calls, as well as the secure exchange of files and documents in all formats.

Does Threema OnPrem have ads?

No, Threema OnPrem is ad-free. As a solution focused on high security and confidentiality for businesses, it does not display advertisements to its users.

What are the system requirements for Threema OnPrem?

Threema OnPrem must be set up on your company's servers. The mobile app is available for iPhone and iPad, and it is compatible with devices rated for ages 4 and up.

How is Threema OnPrem different from the regular Threema app?

The key difference is that Threema OnPrem is a self-hosted solution for businesses, offering complete data sovereignty by running on the organization's own servers. The standard Threema app is a cloud-based service.

What is the update frequency for Threema OnPrem?

The latest version, 7.5.2, was released on November 2, 2026, indicating active development and regular updates to maintain security and functionality for its users.