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

4.09 out of 5

46 ratings in India

5 star
27
4 star
6
3 star
5
2 star
6
1 star
2

Ratings History

Reviews

Sending messages is becoming hell now.

Kishore Pernamitta on

From past week, it is becoming very difficult to send or receive messages on wifi or mobile network.

Constant disconnection of chat service

Paul19901504 on

Whenever I am using the app for sending messages, the session gets disconnected and red line appears on top. I am unable to send messages at this time. This is making the app usage very hard. Please look into it

Congratulations on 10th Anniversary

TOJBC on

Though i am relatively new user, I still absolutely love it

Fantastic app but with two major flaws

To Hell With Amir Khan on

1)No double ratchet algorithm so if security is your main concern this is not the app for you. Go for signal maybe. 2) it’s paid so your friends most likely won’t have this app so who do you chat with? Even if they do they probably won’t tell you for obvious reason. With that said you don’t need a mobile number to sign up so that’s a major plus!

Slow

jainvinay on

This app is so slow for past 5 days. Messages get stuck.

Some issue with app. Doesn’t load quickly

rez435 on

It is an wonderful app but off late it has not been loading properly for me and my friend, have updated the app but still it doesn’t work as it used to previously.. I do not know if it is with the server or something seriously wrong with the app. I wish developer resolve the problem.. I really do like the app

Network connection issues

nitinblue on

The network status keeps showing connecting or disconnected even when high speed wifi and mobile data is working on other apps. Unable to report it through support as that is also not available due app connectivity issues. Downloaded this for privacy but if it doesn’t work when i need it what’s the point.

Poor Call connectivity and ringing

gnairj on

Very poor call connectivity. Ringing automatically goes into very low volume setting.

Reminds me of BBM 😁

logcbox on

Well add : HJDD2KBB

Split View on iPasOS

nilesh-s on

Will it be implemented anytime soon?

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App Info

Publisher
Threema GmbH
Languages
Dutch, German, English, French, Italian, Japanese, Korean, Ukrainian, Polish, Portuguese, Romansh, Russian, Slovak, Spanish, gs, Chinese, Czech, Turkish
Recent version
6.1 (1 week ago )
Released on
Dec 28, 2012 (11 years ago )
Last updated
1 week ago