Threema OnPrem. Self-Hosted

143 reviews
Content rating
USK: All ages
50K+
Downloads
Content rating
USK: All ages
Users Interact
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About this app

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!
Maximum security and total data ownership with Threema OnPrem for enterprises
Updated on
Sep 23, 2026
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Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

138 reviews
Douglas Mabele
July 24, 2024
Better
19 people found this review helpful
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Threema AG
August 2, 2024
Thank you for your review!
Ravi Seshu
July 27, 2026
excellent
8 people found this review helpful
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What’s new

- Fixed a bug related to automatic file downloads
- Improvements to contact synchronization
- Various improvements and bug fixes