Threema: If you need technical assistance in relation to the Threema app, and the FAQs don’t cover your issue, please contact us via the support form.

Threema Work / Threema Education: Do you have a question that’s not covered by the Support section? Please log in to the managment cockpit, and contact us using the form in the Support section.

Threema Broadcast: Questions about Threema Broadcast that aren’t addressed in the FAQs will be gladly answered via support-broadcast at threema dot ch.

Threema Gateway: For questions regarding Threema Gateway, please send an email to support-gateway at threema dot ch.

General Inquiry

If you have a general question, please contact us via info at threema dot ch.

Business Inquiry

For inquiries in relation to our business products (Threema Work, etc.), please send an email to our sales team: sales at threema dot ch


For feature requests and general inputs, please use the feedback form.


Journalists and press representatives can send inquiries to press at threema dot ch. Please find screenshots and other press material on the press page.


If you discover a security issue in Threema, please adhere to the coordinated vulnerability disclosure model.

To be eligible for a bug bounty, please file a report on GObugfree (where all the details, including the bounty levels, are listed).

If you’re not interested in the bug bounty program, you can contact us via the Threema ID:
SECURIT(public key: e3c8dbddead23f1665eb546bda5bdf9203a0c47571ae8bab93fbe5c191b3ed55)

or via security2024 at threema dot ch.

Our PGP public key fingerprint:

pub		rsa4096 2017-02-08 [SC] [expires: 2024-12-31]
		677E 0E97 1669 53B3 2620  D95C 71B9 C6BA C55A 9855


Threema GmbH
Churerstrasse 82
8808 Pfäffikon SZ
Company ID: CHE-221.440.104