Threema Private Blog

Two puzzle pieces facing each other that do not fit together on a green background.

Threema Private

July 22, 2026

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.

Three emoji faces showing eye-rolling, awkwardness, and frustration on a green background.

Threema Private

July 17, 2026

World Emoji Day: Our Emoji Pet Peeves

When the calendar emoji shows the correct date, it’s World Emoji Day. 📅 The cute little pictograms are hugely popular and shape the way we communicate in chats. Yet despite – or perhaps because of – their popularity, they also give rise to a number of minor pet peeves. Here’s a non-exhaustive (and not entirely serious) overview.

Threema Private

June 30, 2026

Anonymity at the System Level – The Ultimate Privacy Protection

More and more messaging apps are introducing usernames, allowing users to communicate without having to share their phone number with everyone. This is certainly a step in the right direction. However, it’s not enough to provide comprehensive privacy protection. To protect users’ privacy, anonymity has to be part of the system architecture.

Illustration of a hand holding a smartphone displaying customer satisfaction survey ratings with emoji faces and colored sliders.

Threema Private

June 2, 2026

Survey Feed: Involving Users in the Development Process

To better tailor the Threema app to our users’ needs, we’re introducing a new survey feed in the Threema Channel. In this feed, periodic user surveys will be conducted to help us identify relevant features and implement them in the best possible way.

Threema Private

May 15, 2026

#DeleteWhatsAppDay: More Relevant Than Ever

Five years ago today, on May 15, 2021, WhatsApp’s controversial new privacy policy came into effect. The update sparked global criticism and raised public awareness of the economic incentives behind data-driven online platforms. With users spending more time online, ever-growing volumes of data, and powerful new AI systems, the concerns raised back then are now even more justified than in 2021.

Android mascot beside a secure vault with lock and key icons.

Threema Private

May 7, 2026

Local Data Security with Android Keystore

Protecting locally stored data is a crucial aspect of any secure messaging app, particularly when server-side storage is intentionally avoided, as is the case with Threema. On Android, the Keystore offers a system-level solution for securely managing cryptographic keys.

Threema Private

April 30, 2026

Cyberattack on Politicians: Security Is More Than Encryption

The wave of attacks targeting Signal and WhatsApp users has not only reached top-level politicians in Germany but also sparked confusion: while some speak of a “hack,” others blame the victims. Here’s why both takes fall short.

Smartphone displaying a chat conversation with text, voice message, image, and location, featuring the new Liquid Glass design.

Threema Private

April 20, 2026

Liquid Glass and a More Modern UI in Threema for iOS

New design, redesigned workflows, and additional features: Threema 7.1 for iOS offers more than just Liquid Glass.

Speech bubbles with exclamation and question marks on a green background with Easter eggs.

Threema Private

April 4, 2026

Get the Message? Of Ghosting, Dry Texting, and Left on Read

Have you ever heard someone say they were “ghosted” and had no idea what it means? Or are you unsure what “dry texting” and being “left on read” is? In this blog post, we explain some common Internet slang terms and concepts relating to instant messaging.