Press Material

Information and graphics for press purposes.


Company Portrait

The Success Story


Cryptography Whitepaper

Security Audit Report 2020

Security Audit Report 2019



Profile Picture “Text me on Threema”



Threema Work

Logo and App-Icon


Threema Work

Available Since


Number of Users


Number of Corporate Customers


60,000 Play Store Reviews

4.6 of 5

Press Releases

Signal, Telegram, Threema: Which is the best WhatsApp alternative?

January 12, 2021

Due to the current controversy surrounding WhatsApp’s privacy policy, Internet users around the globe wonder which chat apps are trustworthy. Besides Threema, Telegram and Signal are often considered to be secure alternatives to WhatsApp. But are theses solutions really equal in terms of security and privacy protection? Is their approach even comparable? And how does their range of features differ?

New Audit Confirms Threema’s Security Once Again

November 26, 2020

As previously announced, the Threema apps’ source code will be published soon. This step ensures full transparency, and anyone knowledgeable enough will be able to independently verify Threema’s security. However, going open source doesn’t mean it’s no longer necessary to commission external experts to audit the code.

Threema Education: Framework Contract with

September 10, 2020

Chat apps have become an indispensable communication tool in many areas, also at school. Thanks to a framework contract with, it’s now easier than ever for public Swiss educational institutions to use Threema Education.

Threema Goes Open Source, Welcomes New Partner

September 3, 2020

After an intense startup phase, Threema lays the foundation for continuity, further growth, and an acceleration of the product development thanks to the entry of the German-Swiss investment company Afinum Management AG. And: The Threema apps will become fully open source, supporting reproducible builds.

Video Calls the Threema Way

August 10, 2020

After a thorough beta test, video calls are now ready for everyday use! Simply switch on the camera during a Threema call, and your contact will see you in stunning image quality, while you can rest assured that no one else is able to access the video.

Maintain a Healthy Work–Life Balance with Threema Work

April 8, 2020

In times of home office and constant availability, it is increasingly difficult to protect one’s spare time against the intrusion of work. Thanks to the new off-hours policy in Threema Work for Android, there is now an efficient way to restore a healthy work–life balance.

Threema in the Media

Press Contact

We’re happy to answer press inquiries sent to press at threema dot ch. For inquiries of a technical or a general nature, please use the contact form.


Threema started life as an abbreviation: “EEEMA,” for “End-to-End Encrypted Messaging Application.” The three “E”s were a bit unwieldy, so it became “Threema.”

Threema is the world’s best-selling secure messenger. It sets itself apart from others in the following respects:

  • Guaranteed privacy: Threema is designed to generate as little data on servers as technically possible.
  • Full anonymity: You are not forced to provide any personal information (such as your phone number or email address) in order to use Threema.
  • Open source: To provide full transparency, the Threema apps are open source. Anyone knowledgeable enough can confirm Threema’s security on their own.
  • Optional contact synchronization: It’s not necessary to grant access to the address book in order to use Threema.
  • Comprehensive encryption: In Threema, all your communications are end-to-end encrypted – not just text messages and voice and video calls but also group chats, media files, and even status messages.
  • Rich functionality: Threema is versatile and feature-rich.

Find out how Threema stacks up against other messengers like WhatsApp, Signal, or Telegram in the comprehensive messenger comparison.

With Threema Work and Threema Gateway, Threema also provides solutions for secure communication in business contexts. 

In contrast to other messengers, your identity in Threema does not depend on a phone number. Each Threema user gets a randomly generated, 8-digit Threema ID when starting the app for the first time. This ID is your unique address in Threema and makes it possible to use Threema completely anonymously, without disclosing any personal information.

Your Threema ID is just one of two components that make up your identity in Threema. The other one is the so called key pair (consisting of a public key and a private key) which is essential for the encryption. Your Threema ID is permanently tied to your public key. While the public key is sent to Threema's servers to be distributed to your chat partners, the private key remains on your device where it is securely stored. All messages directed to you will be individually encrypted with your public key on the sender's device. They can only be decrypted with your personal private key.

Android iOS
Phone iPhone
Tablets iPad
Wearables* (e.g. Smartwatch) Apple Watch*
Android Auto Apple CarPlay

Threema is fully supported.

Threema is not supported.

* If you are using Threema with an Android Wear smartwatch or an Apple Watch, you can read message previews, see chat pictures, agree/disagree to incoming messages and answer messages using dictation (or using Scribble on an Apple Watch).

Threema is currently available in the following languages:

  • English
  • Basque (Spain)
  • Brazilian Portuguese
  • Chinese (traditional and simplified)
  • Czech
  • Dutch
  • French
  • German
  • Italian
  • Japanese
  • Polish
  • Romansh
  • Russian
  • Spanish
  • Slovak (Android)
  • Turkish

If Threema doesn’t support the device’s system language, the user’s preferred languages (as defined in the system settings) will be taken into account. If these languages aren’t available in Threema, English serves as fallback.

Is Threema not yet available in your language? Support the translation here:

Threema is primarily intended for personal use. For corporate use, please consider our business solutions Threema Work and Threema OnPrem, which are tailored to the needs of companies and organizations.

Yes. Special offers are available for schools, universities, and NGOs:

Yes. Both servers and offices only use energy from renewable sources.

The development of the Threema apps and the maintenance of the server infrastructure generates costs. The app price covers these costs.

If we wanted to offer our apps for free, we would have to monetize user data, which, of course, would totally undermine Threema’s purpose (i.e., to protect the users’ data and privacy). Besides, Threema is designed from the ground up to only generate as little user data as technically possible, so there’s next to no user data to begin with.