C
Chattr
CommunicationTeam chat that stays private
Human VerifiedTop RatedEditor's Choice
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About Chattr
Chattr is a self-hosted team communication app. All your messages stay on your servers - not ours, not anyone else's.
Simple, fast, and focused:
- Real-time messaging
- Public and private channels
- Direct messages
- File sharing
- Emoji reactions
- Thread replies
- Search across all messages
Your conversations, your data, your control.
Features
Real-time messaging
Channels (public & private)
Direct messages
File sharing
Emoji reactions
Thread replies
Message search
Unlimited messages
Security & Trust
Certified Secure
Highest LevelPassed all checks including human security expert review
94
Security Score
0
Critical
0
High
2
Medium
5
Low
Security Verification
Automated Security Scan
SAST, dependency, and container scanning
Software Bill of Materials (SBOM)
Complete transparency of all components
CVE Monitoring
No known vulnerabilities - actively monitored
Human Expert Review
Reviewed on 3/16/2026
Checked Against Industry Standards
Recognized Certifications
We validate against these industry-recognized security programs
30-Day Security Guarantee
Full refund if critical vulnerability found