Secure messaging for mission-critical organisators powered by Threema Work
The sovereign alternative to:
Signal
Microsoft Teams
Slack
Sentyron Messaging, powered by Threema Work, is a standalone sovereign messaging solution for organisations where confidentiality isn’t optional. Full control over your data, jurisdiction, and access.
Trusted by government & critical infrastructure
The risk surface for mobile communication has shifted from theoretical to operational. The numbers are no longer warnings — they are the new baseline.
The threat landscape
year-on-year growth in mobile attacks since 2022
countries breached via telecom by Salt Typhoon
surge in state-sponsored espionage in 2024
Government and critical infrastructure teams communicate on consumer tools every day. Not because they don’t know the risk. Because the secure alternatives are too complex, too expensive, or too disruptive to actually use.
The problem
Conversations sit on foreign infrastructure, governed by foreign law and accessible to foreign authorities long before they reach you.
If a tool is harder to open than WhatsApp, your team will route around it. Security that isn’t adopted isn’t security at all.
Leaks happen quietly, through screenshots, forwarded chats and parallel channels. You usually learn about it from the outside.
BIO, NIS2 and sector-specific rules require demonstrable control over who communicates what, where, and through which channel.
— Security officer, Dutch central government
The solution
Sentyron Messaging is built on Threema Work; the messaging platform independently certified for use in high-sensitivity environments. We handle the reselling, onboarding, and first-line support. Your team gets a familiar, intuitive experience. Your security officer gets control, compliance, and a defensible audit trail.
What changes in 30 days
Kick-off call, scoping of users, devices and policies. We align with your security officer and IT lead.
Tenant provisioned under Dutch jurisdiction, admins trained, users invited and active on their first day.
Policies, retention and access logging in place. Auditable evidence for BIO, NIS2 and internal reviews.
Roll out to additional teams, departments or partner organisations without changing the foundation.
Features
Provide your employees with an intuitive business messenger that includes all the features they need for daily collaboration. Available both as a mobile app and as a desktop app.
Threema Work customer cases
These are real Threema Work customers. Global enterprises and government bodies that rely on the same secure messaging foundation Sentyron is built on.
Company-wide official messenger replacing consumer apps on all business devices.
“Modern on-the-go communication in business environments is subject to the same security requirements as traditional communication. This combines speed and usability with those requirements.”
Secure mobile channel between the ministry, other Bavarian departments and citizens all in one.
“The main reason for choosing this messenger was its ability to maintain IT security and data protection.”
Essential coordination tool for a rescue service where data privacy is more than critical.
“We were able to significantly reduce the organisational workload when an employee called in sick. Finding substitutions has never been easier.”
Packages
Threema Work on Swiss hosting and support, delivered through Sentyron.
Threema OnPrem licenses, hosted in your own environment, supported by Sentyron.
Coming soon
Threema Work with Dutch hosting, support and administration.
Packages
Threema Work is built for usability first. Minimal friction, familiar UX, available on all devices.
No US cloud. No CLOUD Act exposure. Hosting governed by Dutch and EU law.
Users are identified by a Threema ID, not a personal number. Identity stays where it belongs.
Manage users, permissions and policies from a single dashboard. Sentyron handles onboarding and first-line support.
This is the first step. Sentyron’s longer-term roadmap includes a fully hosted NL sovereign messaging service; built on this foundation.
Sentyron Messaging is the right fit if your organisation operates under heightened security and compliance obligations.
Dutch central or local government
Critical infrastructure operators (energy, water, transport, finance)
Organisations on the government's approved 'restricted' product list
Organisations subject to BIO, NIS2 or sector-specific communication security requirements
For Whom
Is this the same as regular Threema?
No. Sentyron Messaging is built on Threema Work — the business-grade platform with central administration and additional controls — deployed and supported under Dutch sovereignty.
What makes this different from Signal or Teams?
No. Sentyron Messaging is built on Threema Work — the business-grade platform with central administration and additional controls — deployed and supported under Dutch sovereignty.
Do we need to migrate our entire organisation at once?
No. Most customers start with the teams that handle the most sensitive communications and expand from there.
What happens when we have a support issue?
Sentyron provides Dutch-based first-line support. You speak directly with people who understand your environment and compliance context.
Is this on the approved government product list?
Threema Work is independently certified for use in high-sensitivity environments. We’re happy to walk you through the relevant approvals for your context.
Faq
Get in touch
Talk to us. We’ll map your current situation and tell you honestly whether this fits. No obligations.
No obligations
