Threema. The Secure Messenger
Secure. Anonymous. Private.
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Description

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
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User Rating

4.17 out of 5

24 ratings in Sweden

5 star
18
4 star
0
3 star
1
2 star
2
1 star
3

Ratings History

Reviews

Bad Video call 😡😡😡👎🏻👎🏻👎🏻

Sömtutor on

Why no Video call on Threema 👎🏻👎🏻👎🏻👎🏻😡😡😡

Finally five stars

pseudops on

The latest version remembers language and keyboard for each chat! This seemingly tiny detail is so important for a European chat app - makes this version ten times better than the previous one. Finally I am able to give it a five star review! 😀

Crash crash crash

Bruce_the_shark on

Crashes and now even doesn’t open after the last update!! Please fix 🙏🏼 Iphone 11

Synkar inte

Gulli-Gullan on

Synkar inte med mina kontakter, vilket är riktigt trist. Annars verkar det vara en bra app, men betyget dras ner ordentligt just pågrund av att det inte synkar.

Unstable. Unreliable.

SveBjörn on

Texts not delivered. Calls dropped or not started at all. Threema is seriously playing with its reputation these days.

En lysande app!

Mr.Cosmo66 on

En smidig o säker app för meddelanden o samtal, Threema ligger dessutom med sina servrar i landet med dom absolut strängaste integritetslagarna i världen. Om jag fick önska så skulle det finnas möjlighet att ställa in tid för självradering av meddelanden för varje enskild kontakt. Annars är jag helnöjd. Kan varmt rekommendera Threema till er som ännu inte har den!👍👌

No.1

Haitekh on

Most secure on the planet! Hand down the best message app. 💫

Keyboard problems

Kallski Ankski on

The app keeps showing me the US keyboard even if it is not activated in iOS setting. This makes switching between emoji keyboard and swedish keyboard a problem and it makes my writing really slow.....

Perfect Messanger!

Gillian52635 on

That's how to make an IM. Great app! Many privacy options. Worth the price!

Perfect

Mobydirk on

Works perfectly. There is really no competition. This is the app for messaging. Would be nice to have a desktop and tablet version in the future.

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App Info

Publisher
Threema GmbH
Languages
Portuguese, German, Czech, Chinese, Korean, Slovak, Spanish, French, Dutch, English, Italian, Japanese, Polish, Romansh, Russian, gs, Turkish, Ukrainian
Recent version
6.1.2 (1 week ago )
Released on
Dec 28, 2012 (11 years ago )
Last updated
6 days ago