By AppHub Editorial Team · Updated August 3, 2026

Threema. The Secure Messenger

Threema. The Secure Messenger

4.0 ★
Downloads: 5,000,000+ Reviews: 0

Overview

Category

Communication

Developer

Threema GmbH

Price

Free

In-App Purchases

false

Contains Ads

No

Features

Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy.

Advantages of Threema...

Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy.

Advantages of Threema:

●Text and voice messages, including emoji reactions
●End-to-end encrypted voice, video, and group calls
●Location sharing
●Sending files in all formats (PDF, GIF, MP3, ZIP, and more)
●Ability to edit sent messages and delete them for chat partners
●Desktop app and web client for convenient chatting on your PC
●Group creation and polls
●Light or dark mode
●No ads, no trackers, no data collection
●Identity verification of contacts by scanning their QR code

Reliable security:

●Open source and regular audits
●Servers in Switzerland
●Anonymous use possible: no phone number or email address required
●Messages are deleted from the server immediately after delivery

Do you have any questions or problems? Our FAQ can help: https://threema. com/support

Enjoy using Threema! Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy.

Advantages of Threema:

●Text and voice messages, including emoji reactions
●End-to-end encrypted voice, video, and group calls
●Location sharing
●Sending files in all formats (PDF, GIF, MP3, ZIP, and more)
●Ability to edit sent messages and delete them for chat partners
●Desktop app and web client for convenient chatting on your PC
●Group creation and polls
●Light or dark mode
●No ads, no trackers, no data collection
●Identity verification of contacts by scanning their QR code

Reliable security:

●Open source and regular audits
●Servers in Switzerland
●Anonymous use possible: no phone number or email address required
●Messages are deleted from the server immediately after delivery

Do you have any questions or problems? Our FAQ can help: https://threema. com/support

Enjoy using Threema!

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Frequently Asked Questions

Is Threema. The Secure Messenger free to download?
high

Yes. The app metadata lists Threema. The Secure Messenger as free, with in-app purchases listed as false.

Source: app_metadata

How to Use

Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. (app_description)

Getting Started

Source: app_description_and_user_feedback_noted

  1. Install Threema. The Secure Messenger from the appropriate app store.
  2. Open the app and start with the free experience.
  3. Review the main features described in the app listing.
  4. Adjust app settings based on your preferences.

Key Features (from app listing)

Source: app_description

  • Advantages of Threema:
  • · Text and voice messages, including emoji reactions
  • · End-to-end encrypted voice, video, and group calls
  • · Location sharing
  • · Sending files in all formats (PDF, GIF, MP3, ZIP, and more)
  • · Ability to edit sent messages and delete them for chat partners