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When Systems Go Silent: Staying Connected During a Cyberattack

Imagine a cyberattack paralyzes your internal IT infrastructure – email, chat, and phone systems all go offline at once. How do you communicate? Many companies don’t have an answer until it’s too late. Using a fictional example, we’ll illustrate the consequences a communication outage can have during a cyber incident.

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A laptop screen turns black as chat messages report that systems are no longer accessible.
A laptop screen turns black as chat messages report that systems are no longer accessible.
Threema Work

When Systems Go Silent: Staying Connected During a Cyberattack

Imagine a cyberattack paralyzes your internal IT infrastructure – email, chat, and phone systems all go offline at once. How do you communicate? Many companies don’t have an answer until it’s too late. Using a fictional example, we’ll illustrate the consequences a communication outage can have during a cyber incident.
Notification bell surrounded by warning alerts on a green background.
Threema Private

What’s behind the current wave of cyberattacks?

Over the past few days and weeks, numerous cyberattacks have made headlines. In Switzerland alone, pension funds, the Swiss Broadcasting Corporation (SRG), and the online magazine “Republik” have been affected. In Denmark, 8.8 million personal records were stolen from the central population register, while in France, hackers shut down refrigerators in 150 supermarkets. What’s behind this surge in attacks?
Chat bubble containing a hand holding a glowing light bulb, with a part 2 tag.
Threema Private

Privacy Tips from the Threema Team – Part 2

There are various ways to protect your online privacy. With so many approaches available, it pays to get tips from people who deal with the subject on a daily basis. Here is part two of the best privacy tips from the Threema team.
Chat bubble containing a hand holding a glowing light bulb, with a part 1 tag.
Threema Private

Privacy Tips from the Threema Team – Part 1

If you search the Internet for tips on protecting your online privacy, you’ll find plenty: set a unique password for each service, download updates as soon as possible, and use privacy-friendly alternatives to Big Tech. That’s certainly a great start, but there’s more to it. In this post, we’ve compiled some of the best privacy tips from the Threema team – ranging from general advice to very specific measures.
Illustration of an overloaded server and malfunctioning connected devices.
Threema Private

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

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.
A stylized user overview in the Threema Work management cockpit, with a highlighted button for creating a tag.
Threema Work

Easier Tag Management in the Management Cockpit

Are you already using tags in the management cockpit? If so, the latest update is for you, as it makes managing them much easier. If, however, you’re new to tags, here’s how they can help you organize groups and distribution lists more efficiently.
Three emoji faces showing eye-rolling, awkwardness, and frustration on a green background.
Threema Private

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.
Illustration of a project roadmap with colorful timeline bars on a calendar-like grid.
Threema Work

What We’re Working On

As an app development company, we’re busy day in and day out further developing the Threema apps. Here’s a quick look at what we’re currently working on.
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