Threema. The Secure Messenger

Threema GmbH

About this app

Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy.

Advantages of Threema:
· Text and voice messages, including emoji reactions
· End-to-end encrypted voice, video, and group calls
· Location sharing
· Sending files in all formats (PDF, GIF, MP3, ZIP, and more)
· Ability to edit sent messages and delete them for chat partners
· Desktop app and web client for convenient chatting on your PC
· Group creation and polls
· Light or dark mode
· No ads, no trackers, no data collection
· Identity verification of contacts by scanning their QR code

Reliable security:
· Open source and regular audits
· Servers in Switzerland
· Anonymous use possible: no phone number or email address required
· Messages are deleted from the server immediately after delivery

Do you have any questions or problems? Our FAQ can help: https://threema.com/support

Enjoy using Threema!
Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy.

Advantages of Threema:
· Text and voice messages, including emoji reactions
· End-to-end encrypted voice, video, and group calls
· Location sharing
· Sending files in all formats (PDF, GIF, MP3, ZIP, and more)
· Ability to edit sent messages and delete them for chat partners
· Desktop app and web client for convenient chatting on your PC
· Group creation and polls
· Light or dark mode
· No ads, no trackers, no data collection
· Identity verification of contacts by scanning their QR code

Reliable security:
· Open source and regular audits
· Servers in Switzerland
· Anonymous use possible: no phone number or email address required
· Messages are deleted from the server immediately after delivery

Do you have any questions or problems? Our FAQ can help: https://threema.com/support

Enjoy using Threema!

Ratings and reviews

Consistently exceeds expectations! I have used Threema for years and, if they had stayed with the earliest versions of the app, I'd still purchase it! In addition to the encryption and security, they have continually added features that aren't seen elsewhere with the encryption and security Threema provides. If someone with whom I regularly communicate does not already have it, I purchase it for them. For everything Threema provides, especially at the price, it's ludicrous to not have it!

Desktop and Web clients does not allow you to edit a message after it was sent, while mobile app does. Why? The mobile app does not support voice typing! WHY? EVERY other messaging app supports voice typing! You cannot watch a video inside the app on a desktop! You need to download it to your hard drive first! Terrible! A paid app doesn't have what free ones have! The only reason to use this app is because it doesn't ask for your email and/or phone number, otherwise it's nothing special.

Can't recommend this enough. The only thing it's missing is self destructing messages, but that's not really as reliable as you might think. You should always be careful of the things you send no matter what and that you full trust the person on the other end. If you care about your security and still want group texts, then Theema is the absolute best messaging app for you. Not having to tie your phone number or email to your account is a huge plus for me, while for some people it's nice to be able to see all of your pre-existing contacts (which you can still totally do if you want) I prefer not to just have people be able to find me like that. I had some of my friends downloaded it (I even paid for some of them to get it, because it's that good) and walked them through skipping adding their phone number and email, had them add a master password (which you have to enter when you turn your phone on; optional) and PIN. You can set the PIN for individual chats. I have one group with 10 people who exchange books with each other. There are polls, now there's video chat to compliment the phone calls, you can transfer your account between phones, there's a web client, the servers are in Switzerland, end-to-end encryption by default, you can verify and add your contacts phones by scanning their QR code to avoid "man in the middle" attacks, and best of all you can just totally ditch your account; delete everything and start over whenever you want with a new anonymous ID. Seriously, I cannot stress it enough, if you genuinely care about security you need to buy this app and get your contacts to but it. Sure you can get Signal, which is tied to your phone number (not to mention gets part of its funding from the State Department and has a broken desktop app that stores everything in plain texts files) or WhatsApp (which is owned by Facebook and probably collects your data to sell you garbage) for free, but your paying for the real thing when you get Threema.

What’s new

- Fixed a bug that could occur when using home screen shortcuts
- Fixed a bug that could cause the app to crash when opening the archive
- Various UI improvements and small bug fixes