Threema is the world’s favorite secure messenger and keeps your data out of the hands of hackers, corporations and governments. Threema can be used completely anonymously, allows to make end-to-end encrypted voice calls, and offers every feature one would expect from a state-of-the-art instant messenger.
PRIVACY AND ANONYMITY
Threema is designed to generate as little data on servers as possible – this is a core part of our concept. 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 meta data. Threema is fully compliant with the European privacy legislation (GDPR).
HIGHEST ENCRYPTION STRENGTH
Threema encrypts ALL your communications END-TO-END including messages, voice calls, group chats, media files and even status messages. You can rest assured that only the intended recipient can read your chats, and nobody else – not even us. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on user’s devices to prevent backdoor access or copies.
Threema is not only an encrypted and private messenger but also versatile and feature-rich.
• write text and send voice messages
• make voice calls (requires iPhone 5s / iOS 9 or above)
• share videos, pictures and locations
• send any type of file (pdf, animated gif, mp3, doc, zip, etc.)
• create groups
• conduct polls with the unique 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)
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.
We let users confirm trusted contacts with a QR code or a key fingerprint to prevent man in the middle attacks.
We are a 100% independent and self-financed company in the heart of Switzerland with its own servers and in-house software development. Switzerland is a country with some of the most user friendly privacy laws in the world.
SUPPORT / CONTACT
For questions or problems please consult our FAQs: https://threema.ch/en/faq
Various performance improvements and bug fixes.
Ratings and Reviews
Best messaging app for security
If you want a pretty messenger, stick with the Messages app, Facebook, or maybe Signal - they’re all “secure”. If you want a secure messenger, get Threema. It sends messages securely from device to device, not user to user, so you need to think a bit differently about using it, but that difference in thinking is “this message is encrypted on my device and sent to that other device, which I’ve confirmed is the correct device by scanning its barcode”. This is handy (and one of my main uses) because you know that your snarky comment isn’t going to show up on your wife’s computer as she’s projecting her screen in the conference room at work. True device to device encryption, plus the company’s location in Switzerland with physical control over its servers, combines to make this a very secure messaging app. Even if you’re just using it to send snarky notes about employers, it’s worth the price.
Get this app
I’ve been using this app for years
It is by far the most safe and secure messaging app there is
Once you pay for the original app there is never any charge for any messages pictures videos text messages sent... ever!!
I used to pay a lot of money to send text messages to family in Europe
This app is very popular in Europe but I don’t think it will ever catch on in the United States
but it is definitely worth the purchase
You will need to tell your friends and your family about this app because they need to have the app as well in order to communicate with you.
Once someone else has this app it’s the only way i communicate with them
They begin to use it to and it becomes normal
Almost all of my text messages to people I know go through Threema
Get this app and spread the word
Great but behind on features
This app is great for secure messaging and anonymity.
I wish this app used a in-app purchase model so it could be downloaded for free to increase the user base. They could then charge an in-app purchase for features like voice calling, group chat, or other features that could be limited but allow for basic secure messaging for new users.
However, for being a paid app, it seems to lag in features compared to competing products. I hope they add or fix some of these items:
- Perfect Forward Secrecy on the end to end layer
- self destructing and deleting messages
- video calling
- allow the user to do other messaging while a call is in progress.
- Threema GmbH
- 72 MB
- Social Networking
- Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
- English, Dutch, French, German, Italian, Portuguese, Rhaeto-Romance, Russian, Spanish
- Age Rating
- Rated 4+
- © 2012-2018 Threema GmbH
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With Family Sharing set up, up to six family members can use this app.