US-based service - Your data may be subject to US CLOUD Act and accessed by US authorities

EU Alternative to Mattermost

Name: Mattermost
Brand: Mattermost

🇺🇸US Company

by Mattermost

Accelerate your mission critical workflow by integrating people, processes, tools and AI infrastructure on a resilient and adaptable platform.

💬Messaging Apps

Best European Alternatives to Mattermost

3 privacy-focused, GDPR-compliant alternatives

Element

🇬🇧

by Element

Element is a secure messenger and collaboration platform built on the Matrix open protocol, developed by Element (formerly New Vector) in London, UK. It provides end-to-end encrypted messaging, voice/video calls, and bridging to other platforms (Slack, Teams, WhatsApp). Element is used by the French government, German military (Bundeswehr), and NATO for secure communications. Organizations can self-host for complete data sovereignty, or use Element's managed hosting.

Open SourceSelf-HostableISO 27001EU-hostedGDPR Compliant

freemiumMigration:●●●1-2 days

Why switch?

Element uses the Matrix protocol for broader interoperability.
End-to-end encryption is enabled by default on all Element plans.
Element supports group chats with up to 1000 members, larger than Mattermost.

Consider

Migration from Mattermost may require significant data transfer effort.
Element's user interface may have a steeper learning curve for new users.

View Details Compare Switch Guide

Visit Element

Wire

🇨🇭

by Wire

Wire is a secure collaboration platform founded in 2012 by Janus Friis (Skype co-founder) and headquartered in Zug, Switzerland. It offers end-to-end encrypted messaging, voice/video calls, and file sharing for teams. Wire is open source, independently audited, and used by government agencies and enterprises across Europe for classified communications. It supports self-hosted deployment for organizations requiring full data sovereignty.

EU-BasedGDPR CompliantOpen SourceSelf-HostableSwiss hosted

freemiumMigration:●●●1 day

Why switch?

Wire offers integrated video conferencing for real-time meetings.
Wire supports customizable user permissions for enhanced team control.
Wire's end-to-end encryption is available on all plans for secure messaging.

Consider

Migration from Mattermost may require significant data transfer efforts.
Wire lacks some Mattermost integrations with third-party APIs.

View Details Compare Switch Guide

Visit Wire

Threema

🇨🇭

by Threema

Threema is a Swiss encrypted messenger founded in 2012 by Manuel Kasper in Pfäffikon, Switzerland. Unlike most messaging apps, Threema requires no phone number or email to register — users get a random Threema ID, enabling truly anonymous communication. All messages, calls, and files are end-to-end encrypted, and metadata is minimized by design. Threema is fully open source and has been independently audited. It's widely adopted in German-speaking countries and used by the Swiss government and military.

GDPR CompliantEU-BasedISO 27001Open SourceSelf-HostableSwiss hosted

freemiumMigration:●●●2-3 days

Why switch?

Threema uses Swiss servers, enhancing data privacy protections.
Anonymous registration in Threema avoids phone number linkage.
Threema supports self-destructing messages for enhanced security.

Consider

Mattermost has customizable workflows that Threema lacks.
Migrating data from Mattermost to Threema can be complex.

View Details Compare Switch Guide

Visit Threema

Why switch from Mattermost?

US CLOUD Act

US authorities can access your data stored by US companies, even if stored in Europe.

Privacy Concerns

US companies may collect and use your data in ways not compliant with EU standards.

EU Alternatives

EU-based services must comply with GDPR, giving you stronger privacy protections.

Frequently Asked Questions

Are there European alternatives to Mattermost?

Yes, there are several GDPR-compliant European alternatives to Mattermost. These EU-based services offer similar functionality while ensuring your data stays within EU jurisdiction and is protected under strict European privacy laws.

Why should I switch from Mattermost to an EU alternative?

Switching to an EU alternative gives you better data protection under GDPR, keeps your data in European data centers, and ensures you're not subject to US surveillance laws like the CLOUD Act. Many EU alternatives offer comparable features with stronger privacy guarantees.

Is Mattermost GDPR compliant?

As a US-based company, Mattermost may transfer and process your data in the United States. While they may have GDPR compliance measures, your data could still be subject to US laws including the CLOUD Act.

How do I migrate from Mattermost to an EU alternative?

We provide detailed migration guides to help you switch from Mattermost to European alternatives. These guides include step-by-step instructions, data export procedures, and tips for a smooth transition.