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DDoS Attacks on Threema

If you use Threema regularly, you may have noticed that the service was temporarily unavailable or only partially available on Tuesday evening and Wednesday morning. This was due to a series of DDoS attacks. Below, we explain what happened and outline the measures we’ve taken.

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Threema Work

Threema Work for iOS Adds Group-Call Support

Group calls become available across the board, unleashing their full potential and allowing all Threema Work users to conduct end-to-end encrypted voice and video calls in group chats.

Two angled smartphones display a four-person video call with diverse cartoon avatars.
Threema Private

End-to-End Encrypted Group Calls for Everybody!

Group calls become available across the board, unleashing their full potential and allowing all Threema users to conduct end-to-end encrypted voice and video calls in group chats.

Threema Private

Pay Threema’s Android App with Cash and Remain Anonymous

Threema Private

Threema for iOS: Chat on the Computer Without a Connection to the Smartphone

Starting today, Threema’s innovative new desktop app is available to all iOS users as a stable beta version that can be used as a daily driver.

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Threema Work

New EU Regulations Aim to Strengthen Cyber Resilience

At the end of 2022, the European Union launched a set of regulations (NIS2, DORA, and CER) that aim to reduce vulnerabilities for cyberattacks in organizations and strengthen the physical resilience of critical entities. The scope of the new legal framework is wide-ranging and imposes profound changes on organizations. Webinar About NIS2, DORA, and CER In our webinar on the subject, Rodrigo López Crespo, Criminal and Cybersecurity Lawyer at Monereo Meyer Abogados, and Miguel Rodríguez, Chief Revenue Officer at Threema, talk about business communication in view of the NIS2, DORA, and CER regulations. The webinar is available as an on-demand recording. Watch now

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Threema Work

What the New Federal Act on Data Protection Means for Swiss Companies

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Threema Work

Threema Gateway: Send and Receive Threema Messages via Your Own Software

Wouldn’t it be great to receive error messages or automated notifications conveniently as a text message? Threema Gateway allows you to set up such integration and automation processes.

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Threema Work

Threema Work 5.4 for iOS: Test the Upcoming Desktop App

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Threema Private

Security Proof of Threema’s Communication Protocol

When it comes to cryptographic protocols, a formal security proof is the ultimate hallmark of quality. German researchers now provide such a proof for the Ibex protocol, confirming that Threema’s security is based on a rock-solid foundation.