Threema OnPrem. Self-Hosted

4.4
80 reviews
10K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

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!
Updated on
Dec 2, 2025

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

What’s new

- Fixed a bug in relation to access of stored files
- Message drafts are saved while typing
- Various improvements and bug fixes