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Mattermost vs Threema: Which Secures Business Messaging?

Explore how US-based Mattermost and Switzerland's Threema protect your business communications with top-notch security features.

Last updated: February 1, 2026โ€ขReviewed by Built in EU Team

Should You Switch to Threema?

What You Gain

Enhanced privacy and data protection with end-to-end encryption.

Privacy advantage
Trade-offs

Fewer collaboration tools and integrations compared to Mattermost.

Mattermost has more features
Bottom Line

Switch if privacy is your priority; stay with Mattermost for features.

At a Glance

Data Location
๐Ÿ‡บ๐Ÿ‡ธUS

US data laws

๐Ÿ‡จ๐Ÿ‡ญCH

GDPR protected

Pricing

Mattermost

Contact

Threema

freemium

Migration
Medium difficulty~2-3 days

Privacy & Compliance Comparison

Critical data sovereignty factors at a glance

CriteriaMattermostThreema
Server Location
US (AWS), EU (optional)CH
GDPR Compliance
FullFull
Open Source
E2E Encryption
OptionalAll plans
Data Portability
Full exportUnknown

CLOUD Act Notice

Mattermost is a US company and must comply with CLOUD Act data requests, even for data stored in EU data centers. Threema is not subject to US jurisdiction.

Switching from
Mattermost logo

Mattermost

๐Ÿ‡บ๐Ÿ‡ธ

Mattermost

VS
Switching to
Threema logo

Threema

๐Ÿ‡จ๐Ÿ‡ญ

Threema

US Data Storage

Data subject to US CLOUD Act and may be accessed by US authorities

EU Data Protection

Data protected under GDPR with EU-only data residency

Certifications & Compliance

No certifications listed

GDPR Compliant
EU-Based
ISO 27001
Open Source
Self-Hostable
Swiss hosted

Reasons to Switch

  • โœ“Threema uses Swiss servers, enhancing data privacy protections.
  • โœ“Anonymous registration in Threema avoids phone number linkage.
  • โœ“Threema supports self-destructing messages for enhanced security.
  • โœ“End-to-end encryption is standard across all Threema plans.

Things to Consider

  • !Mattermost has customizable workflows that Threema lacks.
  • !Migrating data from Mattermost to Threema can be complex.
  • !Threema's group chat limit is 256, less than Mattermost's capacity.
Migration difficulty:
Medium
~2-3 days

Migration Overview

Full guide
Difficulty
Medium
Time Estimate
~2-3 days

Depends on data size and complexity

Quick Steps

1

Create Threema account and configure settings

2

Export and prepare data from Mattermost

3

Import data, test integrations, and migrate users

Note: Threema is highly secure and privacy-focused, but may require significant changes to integrate with existing workflows.

Other alternatives to Mattermost

Ready to make the switch?

Start using Threema today and take control of your data privacy.