Threema. The Secure Messenger 5.9.3

Threema GmbH – Commercial – Android iOS
out of 392 votes

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<p>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.</p>
<p>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.</p>
<h2>Privacy and Anonymity</h2>
<p>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).</p>
<h2>Rock-Solid Encryption</h2>
<p>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.</p>
<h2>Comprehensive Features</h2>
<p>Threema not only guarantees encrypted and private messaging but also offers a wealth of versatile features:</p>
<ul>
  <li>Text messaging and voice messages</li>
  <li>Voice, video, and group calls</li>
  <li>Sharing videos, pictures, and locations</li>
  <li>Sending any type of file (pdf, animated gif, mp3, doc, zip, etc.)</li>
  <li>Desktop app and web client for computer-based chatting</li>
  <li>Creating groups</li>
  <li>Conducting polls with the poll feature</li>
  <li>Choosing between dark and light themes</li>
  <li>Unique agree/disagree feature for quick and discreet replies</li>
  <li>Verifying contact identity through personal QR codes</li>
  <li>Using Threema as an anonymous instant messaging tool</li>
  <li>Optional contact synchronization</li>
</ul>
<h2>Servers in Switzerland</h2>
<p>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.</p>
<h2>Full Anonymity</h2>
<p>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.</p>
<h2>Open Source and Audits</h2>
<p>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.</p>
<h2>No Ads, No Trackers</h2>
<p>Threema operates without advertisements and refrains from collecting user data.</p>
<h2>Support/Contact Information</h2>
<p>If you have any questions or encounter issues, please refer to our FAQs: <a href="https://threema.ch/en/faq">https://threema.ch/en/faq</a>.</p>

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