The messenger that puts security and privacy first.

Pay once, chat forever.*
No collection of user data. Open Source.

Threema – Secure messenger with versatile features and no data collection
Threema – Encrypted messenger for Android and iOS

Guaranteed Privacy, Strong Encryption, Open Source

Threema is the instant messenger designed to generate as little user data as possible. All communication is end-to-end encrypted, and the messaging app is open source.

Chat Anonymously: No Phone Number Required

Each user generates a random Threema ID when setting up the chat app. Linking a phone number or email address is optional.

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.

100% Swiss Made and GDPR-compliant

Threema is a true Swiss company hosting its own servers in Switzerland.** From software development to customer support, everything is done in-house. The instant-messaging service is fully GDPR-compliant.

Threema Work App

Threema Work

The ideal chat app for business.
Learn more Free trial

30 days, 30 users. No automatic renewal. No payment details required.

Privacy Is Worth Paying For

There is no such thing as a free lunch. If you don’t pay with money for a service, you pay with your data instead.

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

A Decade of Seriously Secure Messaging

Ice Cream in Exchange for Your Data

Your private life is valuable. Don’t pay with your data

Success Story Hardtschule Durmersheim

More videos

With the 5.0 update, Threema for iOS concludes its UI modernization and introduces a completely redesigned chat view along with some handy new features. 📱✨

09:27 · 15.03.2023

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Threema in the Media