Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. The service can be used completely anonymously. Threema is open source and offers every feature one would expect from a state-of-the-art instant messenger. The app also allows to make end-to-end encrypted voice, video and group calls. Using the desktop app and the web client, you can also use Threema from your desktop. PRIVACY AND ANONYMITY Threema is designed from the ground up to generate as little data on servers as possible. Group memberships and contact lists are managed on your device only, and never stored on our servers. Messages are immediately deleted after they have been delivered. Local files are stored encrypted on your mobile phone or tablet. All this effectively prevents the collection and misuse of your personal information, including metadata. Threema is fully compliant with the European privacy legislation (GDPR). ROCK-SOLID ENCRYPTION Threema end-to-end encrypts all your communication, including messages, voice and video calls, group chats, files, and even status messages. Only the intended recipient, and nobody else, can read your messages. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on the users’ devices to prevent backdoor access or copies. COMPREHENSIVE FEATURES Threema is not only an encrypted and private messenger but also versatile and feature-rich. • Write text and send voice messages • Make voice, video and group calls • Share videos, pictures and locations • Send any type of file (pdf, animated gif, mp3, doc, zip, etc.) • Use the desktop app or the web client to chat from your computer • Create groups • Conduct polls with the poll feature • Choose between a dark and a light theme • Quickly and silently reply with the unique agree/disagree feature • Verify the identity of a contact by scanning their personal QR code • Use Threema as anonymous instant messaging tool • Synchronize your contacts (optional) SERVERS IN SWITZERLAND All our servers are located in Switzerland, and we develop our software in-house. FULL ANONYMITY Each Threema user receives a random Threema ID for identification. A phone number or email address is not required to use Threema. This unique feature allows you to use Threema completely anonymously – no need to give up private information or to open an account. OPEN SOURCE AND AUDITS The source code of the Threema app is open for everyone to review. On top of that, renowned experts are regularly commissioned to conduct systematic security audits of Threema’s code. NO ADS, NO TRACKERS Threema is not financed by advertising and does not collect user data. SUPPORT / CONTACT For questions or problems please consult our FAQs: https://threema.ch/en/faq
Long Delays
Whilst I appreciate the privacy, the delay in texting is really, really bad. Knowing that I and my contact have a good WiFi connection on both ends and messages still take 5 or more minutes to be delivered is unacceptable. For a paid app, long delays on perfectly good WiFi connections should be nonexistent.
Threema secure app
I like this secure app. It has many features and the customer service dept. is very quick to respond and help. I recommend this for anyone needed in a truly secure messaging, texting, etc. app.
Need help
I recently upgraded phone, and am not able to restore account on new phone, what can I do?
Notifications stopped!!!
Upgraded 5 days ago. One of the bugs that was supposed to be fixed was notifications. Not on my app. Now I get ABSOLUTELY NO notifications. I also don’t get chats unless I go into app and tap on contact. This app is useless now!!!
Stupid
I’m so upset. I purchased this so I could remain anonymous when texting and this is NOT it. You have to first invite the person with your actual number!! I paid five dollars for this stupid frickin app and I can’t even use it!!
Would be of been great
This app still need more option in their messaging system. Disappearing time need to be added in for safety reason. You don’t want someone phone to fall in someone else hands and have all old message read. Very scary situation for user. Also id need to be hidden better. Everyone shouldn’t be able to see your personal id in group. If they fix these problem this app would of been great
Threema stoped notifying !!!
Its been over two months now that Threema has stopped working with the notifications! I have turned off/on my phone multiple times, and the app is up to date on the app store😡. This is very annoying given that i paid money for this app
Apr 26, 2024
Apr 25, 2024
Apr 24, 2024
Global chat search that includes media captions• Improvements in relation to Perfect Forward Secrecy • Improvements in relation to group calls • Improvements in relation to Threema 2.0 for desktop • Fixed a bug that could cause the location selection to be removed in some cases before sending • Miscellaneous other bug fixes and performance improvements
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