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Seriously secure mobile messaging.
iOS | Android

Threema is a mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages. Unlike other popular messaging apps (including those claiming to use encryption), even we as the server operator have absolutely no way to read your messages.

End-to-end encryption
All encryption happens on your device, and asymmetric cryptography ensures that only the intended receiver can read your messages.
Synchronize contacts
Find your friends on Threema automatically by synchronizing your contacts. Or add them manually if you prefer – it's your choice.
Share media
Send photos, videos and your current location with the same encryption grade as your text messages.
Scan IDs
Don’t trust any third party with key exchange — scan your friends’ IDs right within the app the next time you meet them.

Available for iPhone and Android.

Download on the App Store Get it on Google Play
or buy from
our own shop
Swiss flag Made in Switzerland.