Threema is the best-selling secure messaging service in the world. It keeps your data safe from hackers, corporations and governments. You can use the service anonymously. Threema is an open-source service that allows you to make encrypted voice and video calls. It also offers all the features one would expect from an instant messenger. Threema Web allows you to access Threema directly from your desktop.
PRIVACY & ANONYMITY
Threema was designed to be as low-impact as possible. Contact lists and group memberships are managed only on your device and not stored on our servers. After messages are delivered, messages are deleted immediately. Your mobile phone or tablet stores encrypted local files. This effectively blocks the misuse and collection of your personal data, metadata included. Threema is fully in compliance with the European privacy legislation (GDPR).
HIGHEST ENCRYPTION STABILITY
Threema’s end-to-end encryption protects all communication, including voice and video calls, group chats and files, as well as status messages. Only the intended recipient can see your messages. Threema uses the open-source NaCl cryptography library to encrypt its messages. To prevent any backdoor access, copies or manipulation of the encryption keys, they are securely stored on the users’ devices.
COMPREHENSIVE FEATURES
Threema is not just an encrypted, private messenger, but it’s also flexible and feature-rich.
* Send voice messages and text messages
* Make video and voice calls
* Share videos, photos and locations
* Send any file (pdf animated, gif, MP3, doc. zip, etc.
* Threema Web can be used to chat from your Desktop
* Create groups
* Use the poll feature to conduct polls
* You can choose between a dark or a light theme
* Instantly and silently respond with the unique agreement/disagree feature
* Check the QR code of your contact to verify identity
* Threema is an anonymous instant messaging service that allows you to send messages anonymously
* Optional: Synchronize your contacts
SERVERS IN SWITZERLAND
All of our servers are in Switzerland and all our software is developed in-house.
FULL ANONYMITY
Every Threema user is issued a unique Threema ID to identify themselves. Threema does not require a phone number or an email address to be used. This unique feature allows you use Threema anonymously. You don’t need to share any private information.
OPEN SOURCE & AUDITS
Everyone can review the source code for Threema’s app. Not only that, but renowned experts are frequently commissioned to perform systematic security audits on Threema’s Code.
NO ADS, NO TRACKERS
Threema does not receive advertising funds and does not collect any user data.
SUPPORT/CONTACT
For questions or problems please consult our FAQs: https://threema.ch/en/faq
