Threema Private
Our Blog
INTERNA
On July 8, 2026, Threema GmbH was converted into Threema AG. Previously, the company operated through two legal entities: Threema GmbH and Threema Holding AG. To simplify the corporate structure, these entities were merged into a single company: Threema AG.
This change has no impact on our users. The company’s headquarters will remain in Switzerland. All contracts and obligations of Threema GmbH have been transferred to Threema AG and will remain unchanged.
New article:
Messenger Interoperability: Well-Intended, but Bad for Data Privacy
WhatsApp has been open to third-party messaging services since fall 2025. Under the EU’s Digital Markets Act (DMA), the platform is required to support interoperability with alternative chat services. While we support the DMA’s underlying goals, we have decided not to implement interoperability with WhatsApp for several reasons.
Threema Private
Useful, Secure, and Versatile Notes in the Threema App
A group chat with you as the only member? What might sound useless at first is a handy feature in Threema: this “group” can be used as a versatile chat for personal notes. Find out in this blog post in what situations this empty group chat is particularly useful.
Threema Private
Statement on ETH Findings
Last year, a student at the Department of Computer Science at ETH Zurich wrote his master’s thesis on Threema’s communication protocol. ETH Zurich has now published his work as a paper/preprint. The presented findings have been addressed or no longer apply to Threema’s current communication protocol “Ibex.” None of them ever had any considerable real-world impact.
Threema Private
A Decade of Seriously Secure Messaging
Exactly ten years ago today, on 12/12/2012, the first ever Threema version was published in Apple’s App Store.
Threema Private
A Decade of Seriously Secure Messaging
Threema Private
Threema for iOS: Preview of Upcoming Multi-Device Functionality
Threema Private
New Communication Protocol “Ibex” and Extended Protocol Suite
Just in time for the tenth anniversary, Threema introduces “Ibex,” a new cryptographic communication protocol that further solidifies Threema’s time-tested security and future-proofs the overall system. On top of that, the overhauled protocol suite receives additional key components that lay the groundwork for forthcoming features.
Threema Private
Agree/Disagree Feature for Groups
Threema Private
