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.
Should You Switch to Threema?
Enhanced privacy and data protection with end-to-end encryption.
Fewer collaboration tools and integrations compared to Mattermost.
Switch if privacy is your priority; stay with Mattermost for features.
At a Glance
US data laws
GDPR protected
Mattermost
Contact
Threema
freemium
Privacy & Compliance Comparison
Critical data sovereignty factors at a glance
| Criteria | Mattermost | Threema |
|---|---|---|
Server Location | US (AWS), EU (optional) | CH |
GDPR Compliance | Full | Full |
Open Source | ||
E2E Encryption | Optional | All plans |
Data Portability | Full export | Unknown |
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.
Mattermost
🇺🇸Mattermost
Threema
🇨🇭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
Reasons to 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.
- ✓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 Overview
Depends on data size and complexity
Quick Steps
Create Threema account and configure settings
Export and prepare data from Mattermost
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.

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