# Threema OnPrem — Self-Hosted Business Messaging > Self-hosted, end-to-end encrypted business messaging with full data sovereignty. (iPhone/iPad app by Threema GmbH.) - Source: https://appshunter.io/ios/app/threema-onprem/id1348687756 (this page in markdown: same URL + `.md`) - Developer: [Threema GmbH](https://appshunter.io/developer/535112011) - Category: Social Networking, Utilities - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 102 MB - Languages: American English, Bulgarian, Czech, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Polish and 9 more - Released: 2021-12-20 - Data updated: 2026-08-17 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/threema-onprem/id1348687756/reviews.md ## What is Threema OnPrem? Threema OnPrem is the self-hosted communication solution for organizations with the highest security requirements. The combination of Threema’s proven security architecture and complete data sovereignty creates an independent communication environment that is unmatched in terms of confidentiality – ideal for government agencies, police forces, and industrial companies. Advantages of Threema OnPrem: • 100% data sovereignty through hosting on your own servers • Proven Threema security architecture • Confidential communication in teams, groups, and projects • End-to-end encrypted voice and video calls • Secure exchange of files and documents in all formats • Cross-platform use thanks to mobile app, desktop app, and web client • Additional protection of confidential chats with PIN or fingerprint NOTE: Before you can use this app, Threema OnPrem must be set up on your company server. For more information, visit threema.com/onprem. Enjoy using Threema OnPrem! ## Key features - Self-hosted solution - Complete data sovereignty - End-to-end encrypted calls - Secure file sharing - Cross-platform compatibility - PIN/fingerprint chat protection ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/threema-onprem/id1348687756/reviews.md ### 1/5 — Migration auf anderes Gerät unmöglich *2026-03-04* 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. ## Frequently asked questions about Threema OnPrem ### 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. ## Version history (last 5 releases) ### 7.3.2 — 2026-08-12 • Various improvements and various bug fixes Threema OnPrem 7.3.1 • Easy device switch: When switching to a new iPhone, you can transfer your Threema OnPrem data directly to the new iOS device using Quick Start (can be disabled by the administrator) • Various UX improvements • Improvements in relation to the logging system • Improved video converting when “Original” is selected as the quality • Memory and performance improvements when handling large files • Improvements in relation to Threema calls • Fixed a bug in relation to group chat notifications • Fixed a possible bug that could occur when encoding URLs • Fixed a bug in relation to voice messages • Fixed various bugs in relation to the custom company logo • Other improvements and various bug fixes ### 7.3.1 — 2026-07-27 • Easy device switch: When switching to a new iPhone, you can transfer your Threema OnPrem data directly to the new iOS device using Quick Start (can be disabled by the administrator) • Various UX improvements • Improvements in relation to the logging system • Improved video converting when “Original” is selected as the quality • Memory and performance improvements when handling large files • Improvements in relation to Threema calls • Fixed a bug in relation to group chat notifications • Fixed a possible bug that could occur when encoding URLs • Fixed a bug in relation to voice messages • Fixed various bugs in relation to the custom company logo • Other improvements and various bug fixes ### 7.2.5 — 2026-06-22 • Fixed an issue that caused only a black screen to be displayed in certain cases Threema OnPrem 7.2.4o • Fixed a bug that could occur when opening chats • Fixed a bug that could occur when connecting to the server • Fixed a bug that occurred when deleting or editing sent messages • Various improvements related to VoiceOver and voice messages Threema OnPrem 7.2.3o • Fixed a bug related to restoring a Threema Safe backup with an own server Threema OnPrem 7.2.2o • Fixed a bug related to the contact synchronization Threema OnPrem 7.2.1o • Fixed several bugs related to the Liquid Glass design • Fixed several bugs related to individual and group calls • Fixed several bugs related to forwarding messages • Various performance optimizations • General improvements and various bug fixes ### 7.2.4 — 2026-06-15 • Fixed a bug that could occur when opening chats • Fixed a bug that could occur when connecting to the server • Fixed a bug that occurred when deleting or editing sent messages • Various improvements related to VoiceOver and voice messages Threema OnPrem 7.2.3o • Fixed a bug related to restoring a Threema Safe backup with an own server Threema OnPrem 7.2.2o • Fixed a bug related to the contact synchronization Threema OnPrem 7.2.1o • Fixed several bugs related to the Liquid Glass design • Fixed several bugs related to individual and group calls • Fixed several bugs related to forwarding messages • Various performance optimizations • General improvements and various bug fixes ### 7.2.3 — 2026-06-01 • Fixed a bug related to restoring a Threema Safe backup with an own server Threema OnPrem 7.2.2o • Fixed a bug related to the contact synchronization Threema OnPrem 7.2.1o • Fixed several bugs related to the Liquid Glass design • Fixed several bugs related to individual and group calls • Fixed several bugs related to forwarding messages • Various performance optimizations • General improvements and various bug fixes ## Apps similar to Threema OnPrem | App | Rating | Price | Category | | --- | --- | --- | --- | | [StealthTalk Private Messenger](https://appshunter.io/ios/app/stealthtalk-private-messenger/id1475892684) | 3.8 (10) | Free | Social Networking | | [Zing: Sound Stickers Messenger](https://appshunter.io/ios/app/zing-sound-stickers-messenger/id1072782209) | 3.5 (181) | Free | Social Networking | | [Crypviser Secure Messenger](https://appshunter.io/ios/app/crypviser-secure-messenger/id1282141716) | 4.5 (81) | Free | Social Networking | | [WireMin: Chat Freely, Securely](https://appshunter.io/ios/app/wiremin-chat-freely-securely/id1554435587) | 4.7 (31) | Free | Social Networking | | [Pryvate: Encrypted Messenger](https://appshunter.io/ios/app/pryvate-encrypted-messenger/id914948581) | 4.4 (73) | Free | Social Networking | | [Kedr](https://appshunter.io/ios/app/kedr/id1328795354) | 1.4 (5) | Free | Social Networking | ## More apps by Threema GmbH - [Threema. The Secure Messenger](https://appshunter.io/ios/app/threema-the-secure-messenger/id578665578) - [Threema Work. For Companies](https://appshunter.io/ios/app/threema-work-for-companies/id1105927783) All apps by Threema GmbH: https://appshunter.io/developer/535112011 ## Related topics [threema onprem](https://appshunter.io/ios/topics/threema-onprem) · [threema](https://appshunter.io/ios/topics/threema) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*