Threema Is a Statement

Threema is more than a chat app. Threema is a statement. A statement for privacy.

Sound Principles

Security and privacy are deeply ingrained in Threema’s DNA. Since 2012, we have been vigorously committed to ensure that our users can communicate without having to worry about privacy and security. In the time to come, we will continue to base both the software development and our business decisions on our users’ security and data protection.

Genuine Swiss Company

Precision, reliability, and discretion are typical Swiss characteristics, and as a true Swiss company, Threema lives these values every day.

Company Infrastructure

Threema hosts its own servers in two independent and physically separated locations in Switzerland. In case of an outage in one location, the other location takes over to provide seamless service continuation.

In-House Development and Support

All software is developed in-house in Switzerland. No work is outsourced. Our dedicated support staff ensures consistent high quality and fast response times.

No Collection of User Data, No Ads

Services that are financed by advertising collect user data in order to target their ads. Threema is not financed by advertising and does not collect user data.

Awards and Achievements

Threema is the best-selling chat app, it consistently scores top grades in messenger tests, and the community rewards it with excellent ratings.

Top Ratings and Reviews

Threema consistently receives top scores in the app stores. In the Google Play Store, the app has gained 4.6 out of 5 stars, based on more than 59,900 votes.

Best-Selling Chat App

Since 2014, the Threema app has continuously been at the top of the app charts. As of January 2020, Threema has attracted over 8 million users, including over 2 million Threema Work users.

Winner of Numerous Comparisons

Threema regularly emerges victorious in messenger comparisons and receives awards for its rock-solid security, its unparalleled privacy protection, and its ease of use.


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.
  • 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.
  • Open standards: Threema uses a cryptographic library that’s open source.
  • No-nonsense privacy policy: Threema’s transparent privacy policy is concise and fits on a sheet of paper.

Threema sets itself apart from other encrypted messengers in many respects, not only in terms of functionality or the encryption quality but also in regard to privacy protection. Learn more.

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
  • Czech
  • Dutch
  • French
  • German
  • Italian
  • Polish (Android only)
  • Romansh
  • Russian
  • Spanish
  • 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 tailored to the needs of private users. For business use, we recommend Threema Work.

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