G DATA Secure Chat


The secure messenger service for your Android smartphone

Top features

Send SMS securely

A security key that you share with other users guarantees that only they can read your messages.

Encrypt chats with your group

Your data is also encrypted when sent in a group chat. The keys are on your contacts' smartphones.

Self-Destructing Messages

With the self-destruct timer, you can rest assured that your personal data will not be forwarded to third parties.

Encrypted data sharing

Middlemen are left with no chance: Only your smartphone and the recipient's device can decrypt the messages that are sent. Your data traffic remains secure and you retain all rights to the contents.

Complete protection with no holes

G DATA Secure Chat is open source software, meaning that the source text is freely available and has been checked in detail for backdoors and security holes. Independent organizations have found the app to be secure.

Fast help

Our experienced service team is there to give you more help 24/7 if you have any questions about G DATA Secure Chat. Contact our technical support team via the contact form or call us.


Simply download G DATA Secure Chat for free via the Google Play store. In the app, click on "Install" – the function will then run automatically. If your number is not stored on the SIM card, you will need to enter it to register. The app is then ready to use.

Versions for iOS and desktop will be available shortly.

Download now:
SECURE CHAT im Google PlayStore

Even more protection functions
Enhance your app with G DATA Mobile Internet Security


Protection against malware and phishing*

The reliable web protection safeguards you from viruses and the latest threats so you can surf in safety at any time. When you click on links in chat messages, the app checks whether phishing attacks are involved.

SMS messages are filtered*

Specify for yourself which SMS messages reach you. Save senders of unwanted text messages to a blacklist.

Hidden contacts*

Your contacts are secure: Protect your data in a separate area with a password.

Learn more about Mobile Internet Security

*As soon as you have installed Mobile Internet Security on your device, the additional functions of Secure Chat will be enabled.


Why can I only get Secure Chat via Google Play?

We use the Google Cloud service for notification of new messages. Hence the app cannot function without a connection to Google Play. In addition we can better ensure that you always receive the latest version of the app with all security updates in good time.

What is the outlook for an app for Windows Phone or iOS?

We are already working on an app for iOS. We will release this and more versions for other operating systems as quickly as possible.

Why do I need to enter my telephone number to use Secure Chat?

This prevents any other users from gaining access to your data. In this way we use an SMS to check whether the number entered and hence your SIM card are really associated with your device. Furthermore, every number is unambiguous, so it cannot be swapped with other users.

Can I also send encrypted SMS via Secure Chat?

Yes! As soon as you have shared the security key with a chat partner, you can also send encrypted SMS to this partner.

Why can't I send encrypted SMS to all my contacts?

A prerequisite for encrypting messages is that there are options on both sides – for the sender and recipient – of encrypting and decrypting a message. We can only guarantee this if both parties are using our app. Unfortunately this means that those contacts of yours who send and receive SMS without using our app cannot use this encryption.

Is your encryption really secure?

Yes. We use the Axolotl protocol, which has been checked by independent bodies and found to be secure. The source text for our app is freely available and can be viewed by anyone. Hence nobody needs to take our word for it that our software is secure.

Can you really not read my data?

No. All of the keys exist only on the devices themselves. We have no access at all to your data.

I have entered a password for Secure Chat and forgotten it. Can you reset it?

No. For security reasons this password is never sent to us. Unfortunately this also means that we cannot reset it if you lose it. This is an important aspect of the security concept. If we could change your password, we would also be capable of reading your messages. Hence your data will actually be lost if you forget your password and do not have a backup you can access.