Introduction to Threema

Threema is renowned as the world’s best-selling secure messenger, dedicated to keeping your personal data out of the hands of hackers, corporations, and governments. Designed with privacy at its core, Threema offers users the ability to communicate completely anonymously. As an open source application, it provides all the features expected from a state-of-the-art instant messenger, including end-to-end encrypted voice, video, and group calls. Additionally, Threema extends its usability to desktop users via its dedicated desktop app and web client, ensuring seamless communication across devices.

Privacy is fundamentally embedded in Threema’s architecture. The platform is built to generate minimal data on its servers. Contact lists and group memberships are managed solely on your device and are never stored centrally. Messages are immediately deleted after delivery, and all local files are encrypted when stored on your device. This rigorous approach effectively prevents the collection and misuse of personal information, including metadata. Threema’s compliance with European privacy legislation (GDPR) affirms its commitment to user privacy.

Threema employs end-to-end encryption for all communications — messages, voice calls, video chats, group conversations, files, and status updates. This means that only the intended recipient can decrypt and read the data, ensuring complete confidentiality. The app uses the trusted open source NaCl cryptography library for securing data. Encryption keys are generated and securely stored directly on users’ devices, eliminating the risk of backdoor access or data leaks.

• Write text and send voice messages
• Edit and delete sent messages on the recipient’s side
• Make voice, video, and group calls
• Share videos, pictures, and locations
• Send any type of file (pdf, gif, mp3, doc, zip, etc.)
• Use the desktop app or the web client for computer chats
• Create and manage groups
• Conduct polls with an integrated feature
• Switch between dark and light themes
• React to messages using emojis
• Verify contact identities via QR codes
• Use Threema as an anonymous messaging tool
• Optional contact synchronization

All Threema servers are located in Switzerland, emphasizing privacy and security standards. The company develops its software in-house, maintaining full control over its infrastructure and codebase. The open source nature of Threema’s app allows anyone to review its source code. Regular security audits conducted by reputable experts further attest to its robust security model, ensuring users can trust the platform with their sensitive communications.

One of Threema’s unique features is full anonymity. Each user receives a randomized Threema ID, which serves as their unique identifier. Unlike other messaging apps, Threema does not require a phone number or email address to register, allowing users to chat without revealing their identity. This approach guarantees complete privacy and confidence, especially for users seeking discreet communication channels.

Unlike many free messaging platforms, Threema is not financed by advertisements and does not collect user data for tracking purposes. This philosophy ensures an ad-free, tracker-free experience, prioritizing user privacy over monetization. The platform’s revenue comes solely from app sales, making it a truly privacy-focused alternative in the crowded messaging app landscape.

In a digital world riddled with data breaches and privacy concerns, Threema emerges as a trusted secure messenger designed to safeguard your conversations at every level. Its robust end-to-end encryption, strict privacy policies, and open source transparency make it an ideal choice for individuals prioritizing privacy and security. Whether you need a simple chatting app or a versatile communication tool, Threema’s feature-rich platform supports everything from text messaging to multi-party video calls. With its focus on anonymity and compliance with GDPR, Threema offers peace of mind for those wanting to keep their private conversations truly private. Embrace secure messaging today and talk with confidence—your secrets are yours to keep.