Threema
Secure instant messenger from Switzerland with GDPR-compliant messaging for privacy and data protection
- 0 community votes
- Communication & Collaboration
Threema metrics
| Metric | Value |
|---|---|
| Domain Rating | 77 −1 (down) since last check |
| Trust Flow | 45 no change since last check |
| Citation Flow | 55 no change since last check |
| Referring domains | 5,451 no change since last check |
| External backlinks | 924,528 no change since last check |
Ahrefs Domain Rating last compared 17 Oct 2026, it last moved 15 Oct 2026. Strongest topic: Regional/Europe (42). Majestic data compared 3 Oct 2026, it last moved 3 Oct 2026. Link figures come from Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Threema: the domain behind it
| Domain age | 13 years |
|---|---|
| Registered | |
| Expires | |
| Registrar | COREhub, S.R.L. |
| DNSSEC | Signed |
Threema is a secure instant messaging app offering end-to-end encrypted communication for individuals and businesses, with options for personal use or enterprise deployment.
About Threema
Threema is a Swiss-based secure messaging platform offering end-to-end encrypted communication for messages, calls, and files. It serves individuals through Threema Private and businesses through Threema Work and Threema OnPrem. The platform emphasizes privacy by not requiring phone numbers or email addresses, maintaining zero-knowledge architecture, and minimizing metadata collection.
The service includes features such as text and voice messaging, group chats, voice and video calls, file sharing, and distribution lists. Threema Work provides centralized management for corporate deployment, while Threema OnPrem enables complete data sovereignty through self-hosting. The company operates with GDPR compliance and emphasizes transparency through open-source code and regular security audits.
Threadema is developed exclusively in Switzerland and operates redundant server infrastructure within the country. The platform uses open-source encryption technology and implements Perfect Forward Secrecy to prevent retrospective decryption. Messages are deleted from servers after delivery and contact lists remain on users' devices.
What it offers
- End-to-end encrypted text messages
- Voice and video calls
- Group chats and distribution lists
- File and media sharing
- Desktop and web client
- Group calls
- Screen sharing on desktop
- Polls
- Contact verification via QR code
- Availability status for work
Pricing
Pricing model: Freemium
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FAQ
Does Threema require a phone number or email address?
No. Unlike most other messengers, Threema does not require a phone number or email address. Your unique Threema ID enables confidential communication without revealing your identity or personal network.
How is user privacy protected in Threema's architecture?
Threema uses a zero-knowledge architecture where only intended recipients can read messages. Neither third parties nor Threema itself have access to message content. The platform also reduces metadata to the technical minimum, with messages disappearing from servers after delivery and contact lists remaining on users' devices.
Is Threema GDPR compliant?
Yes. Threema meets all data protection requirements and goes significantly beyond minimum standards. For companies, this means documented legal certainty and protection against costly compliance violations in digital communication.
Can I verify the security of Threema?
Yes. Threema demonstrates security through transparency: the code is open source and undergoes regular external security audits. With reproducible builds, users can verify the integrity of the installed apps themselves.
What encryption technology does Threema use?
Threema uses strong cryptography based on open-source encryption technology. All messages, calls, and files are protected with end-to-end encryption. Perfect Forward Secrecy prevents retrospective decryption even in the event of key compromise.
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