Threema. The Secure Messenger 5.9.3

Threema. The Secure Messenger 5.9.3

Threema GmbH  ❘ Commercial
Android iOS
out of 392 votes
Latest Version
5.9.3
Safe to install

Threema: The Ultimate Secure Messaging Solution

David Fischer

Threema offers top-notch encryption and privacy for users seeking a secure communication method, making it a standout choice in the world of messaging apps.
2025 Editor's Choice
VERY GOOD User Rating

Threema is a highly acclaimed and widely used secure messenger, offering unparalleled data protection against hackers, corporations, and governments. The service prioritizes user anonymity, allowing you to maintain complete discretion while using the app. With its open-source nature, Threema boasts all the cutting-edge features expected from an instant messenger.

In addition to secure messaging, Threema enables encrypted voice, video, and group calls to ensure the utmost privacy in all forms of communication. Users can also conveniently access Threema from their desktop through the desktop app and web client.

Privacy and Anonymity

Threema is meticulously designed to minimize server-generated data. Group memberships and contact lists are solely managed on your device, never stored on Threema servers. Messages are promptly deleted after delivery, while local files remain encrypted on your mobile device or tablet. These measures effectively safeguard personal information and metadata from collection and misuse. Threema fully complies with the stringent European privacy legislation (GDPR).

Rock-Solid Encryption

Threema employs end-to-end encryption for all types of communication: messages, voice and video calls, group chats, files, and even status messages. Your messages can only be read by the intended recipient; no third parties can access them. Threema utilizes the trusted open-source NaCl cryptography library for encryption. Encryption keys are generated and securely stored on users' devices, eliminating any potential backdoor access or unauthorized duplication.

Comprehensive Features

Threema not only guarantees encrypted and private messaging but also offers a wealth of versatile features:

  • Text messaging and voice messages
  • Voice, video, and group calls
  • Sharing videos, pictures, and locations
  • Sending any type of file (pdf, animated gif, mp3, doc, zip, etc.)
  • Desktop app and web client for computer-based chatting
  • Creating groups
  • Conducting polls with the poll feature
  • Choosing between dark and light themes
  • Unique agree/disagree feature for quick and discreet replies
  • Verifying contact identity through personal QR codes
  • Using Threema as an anonymous instant messaging tool
  • Optional contact synchronization

Servers in Switzerland

All Threema servers are located within Switzerland, offering an added layer of trust and privacy. Moreover, Threema takes pride in developing its software in-house.

Full Anonymity

Threema assigns each user a random Threema ID, eliminating the need for phone numbers or email addresses. This unique feature ensures complete anonymity without requiring you to divulge personal information or create an account.

Open Source and Audits

The source code of the Threema app is open for public scrutiny. Additionally, Threema regularly commissions renowned experts to conduct comprehensive security audits of its code.

No Ads, No Trackers

Threema operates without advertisements and refrains from collecting user data.

Support/Contact Information

If you have any questions or encounter issues, please refer to our FAQs: https://threema.ch/en/faq.

Overview

Threema. The Secure Messenger is a Commercial software in the category Internet developed by Threema GmbH.

The latest version of Threema. The Secure Messenger is 5.9.3, released on 05/03/2024. It was initially added to our database on 11/10/2023.

Threema. The Secure Messenger runs on the following operating systems: Android/iOS.

Users of Threema. The Secure Messenger gave it a rating of 4 out of 5 stars.


David Fischer

David Fischer

I am a technology writer for UpdateStar, covering software, security, and privacy as well as research and innovation in information security. I worked as an editor for German computer magazines for more than a decade before joining the UpdateStar team. With over a decade of editorial experience in the tech industry, I bring a wealth of knowledge and expertise to my current role at UpdateStar. At UpdateStar, I focus on the critical areas of software, security, and privacy, ensuring our readers stay informed about the latest developments and best practices.

Latest Reviews by David Fischer

Screenshots (Click to view larger)

Related


2020AppLock

Secure Your Privacy with 2020AppLock

App Locker - Lock App

AppLocker is a privacy protection application that allows you to secure your favorite apps like WhatsApp, Facebook, and Gallery. With AppLocker, you can prevent unauthorized access and protect your personal information.

AppLock

Secure Your Privacy with AppLock: The Ultimate Locking Solution

Applock - lock apps - pin lock

Applock - lock apps - Pin lock: A reliable tool to protect your privacy and personal data in mobile apps Applock - lock apps - Pin lock is an indispensable app for anyone concerned about the security of their phone.

AppLock Master

The best free App Lock ⭐️ ⭐️ ⭐️ ⭐️ ⭐️ Features: Lock apps with PIN, Pattern Fingerprint (Only for Samsung devices with fingerprint sensor and Android 6.0 devices with fingerprint sensor) Random keyboard Time Password Show Password …

AppLock Plus - App Lock & Safe

Keep your private photos and videos secure with AppLock Plus, a mobile app locker used by people worldwide. It offers features like App Lock, Photo Hide, Video Vault, Intruder Alert, pattern, fingerprint, and password lock all to protect …
Secure and free downloads checked by UpdateStar

Buy now
Play Store
Stay up-to-date
with UpdateStar freeware.

Latest Reviews

EaseUS Backup Center EaseUS Backup Center
EaseUS Backup Center: Centralized Backup Management for Business
E EaseUS PDF Converter
EaseUS PDF Converter: Ein vielseitiges Tool zur PDF-Konvertierung
Dr. Folder Dr. Folder
Dr. Folder by YL Computing: Simplified Folder Management Tool for Windows
SoftOrbits Photo Background Remover SoftOrbits Photo Background Remover
SoftOrbits Photo Background Remover: Simplified and Effective for Editing Product Photos
SolidWorks SP04.1 SolidWorks SP04.1
SolidWorks SP04.1: A Comprehensive CAD Solution for Engineers and Designers
Home Assistant Home Assistant
Home Assistant: Your All-in-One Smart Home Solution
UpdateStar Premium Edition UpdateStar Premium Edition
Keeping Your Software Updated Has Never Been Easier with UpdateStar Premium Edition!
Microsoft Edge Microsoft Edge
A New Standard in Web Browsing
Google Chrome Google Chrome
Fast and Versatile Web Browser
Microsoft Visual C++ 2015 Redistributable Package Microsoft Visual C++ 2015 Redistributable Package
Boost your system performance with Microsoft Visual C++ 2015 Redistributable Package!
Microsoft Visual C++ 2010 Redistributable Microsoft Visual C++ 2010 Redistributable
Essential Component for Running Visual C++ Applications
Microsoft OneDrive Microsoft OneDrive
Streamline Your File Management with Microsoft OneDrive

Latest Updates


ProtonVPN 4.2.1

Stay Secure and Private Online with ProtonVPN

Norton 25.3.9983.1516

Stay Safe Online with Norton Security

BibleStudy 6.1.1.1994

Unlock the Depths of Scripture with BibleStudy

Axialis IconVectors 1.0

Axialis IconVectors is a streamlined, high-performance SVG icon editor designed specifically for software developers and UI designers who need precise control over small vector graphics.

YouTube Song Downloader 25.7.0

Effortlessly Download Your Favorite Songs from YouTube

AntiBrowserSpy 2026.9.01

Protect Your Online Privacy with AntiBrowserSpy