Threema. The Secure Messenger Icon
Download Threema. The Secure Messenger

Threema. The Secure Messenger

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, and offers a rich set of features.
Category Price Seller Device
Social Networking $5.99 Threema GmbH iPhone, iPad, iPod

Threema encrypts ALL your communications END-TO-END including messages, 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 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 not only an encrypted and private messenger but also versatile and feature-rich.

• create a poll with the unique poll feature
• write text and send voice messages
• send any type of file (pdf, animated gif, mp3, doc, zip, etc.)
• share videos, pictures and locations
• create group chats, add and remove members at any time
• synchronize your contacts (optional)
• verify the identity of a contact by scanning their personal QR code
• use Threema as anonymous instant messaging tool

The integrated poll feature in Threema makes decisions easy. Easily poll your friends on anything in just a few simple steps and get immediate results.

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.

For questions or problems please consult our FAQs:


Love the anonymity and security

Doesn’t require number ✅ Doesn’t require email ✅ Most secure chat service ✅ Fully encrypted end to end ✅ Opensource code ❤️ Encrypted video and voice chat ?

way bettet then zoom ???????

you should incorporate AI generated qr codes to every call and message for full anonimity?✌️ i would pay 5 to 10 dollars if that was incorporated you could dominate britan,germany and china. maybe AI random generated IP address as well?

Great app. Fundamentally secure.
Tim Cook is J3sus

I like threema because it is fundamentally secure and the model makes sense to me. I'm hoping for more features like being able to react with emojis instead of "agree/disagree". But other than that it's great

Not up to WhatsApp standards yet
Couch psych

This app needs a few modifications to be up to its competitors’ standards- especially on iPhones. Update: thanks for responding! A few ideas: - add a check mark once an audio message has been played - allow iPhone users to type messages within the app while listening to a received audio message (right now the pop out audio message window is preventing that). - add the pause button that android users have when recording audios (I don’t believe iPhones users have it, but if they do, make it more obvious?) - prevent audio from going quiet when something is saved over the phone. - when an audio message has not been fully played, it would be great if we could start listening where we left off (right now when the pop out window is closed we have to restart audio messages from the beginning).


Very good so far!

Perfect but…

You should add “Delete For Everyone” feature, or make timing feature at leas.

Great app, currently is slow

The app lags for 3-7 seconds whenever I click any media. I will update to 5 stars when this is fixed.


Whenever a call is initiated, the entire iPad freezes

Now has private investors. Can be compromised.
Charlie Full

It's getting worse at sending messages in a timely manner. I hate WhatsApp, and I mean hate it. But it works consistently. NEVER an issue with WhatsApp. Threema, every freaking day. I'm starting to take it personally. We pay for this, and it holds up my messages, delivers them out of sequence or doesn't deliver them at all.

Great app but it needs improvements.

I love the app and the idea of the ID and no contact & email sync but it needs a few features. 1. Expiring photo option (view once or forever). 2. Messages time duration (1hr, 1 day, 1 week etc). Other than those, it’s all good.