Self-Hosted Chat: Matrix, Mattermost, and Rocket.Chat Compared
Replace Slack and Discord with self-hosted chat. Compare Matrix, Mattermost, and Rocket.Chat for private team communication in your homelab.
Posted by
Rafal GawlikRelated reading
Private Cloud vs Public Cloud: When to Self-Host and When Not To
Understand when self-hosting makes sense and when public cloud is better. A practical guide to choosing between private cloud homelab and AWS/GCP/Azure services.
Homelab Documentation: Wiki.js vs BookStack for Self-Hosted Wikis
Document your homelab setup with self-hosted wikis. Compare Wiki.js and BookStack for creating searchable documentation of your infrastructure and procedures.
Docker Security Scanning: Trivy and Dockle for Safe Containers
Scan your Docker images for vulnerabilities before deploying. Learn to use Trivy and Dockle to secure your self-hosted homelab container infrastructure.
Why Self-Host Chat?
Slack reads your messages. Discord monetizes your data. Self-hosted chat keeps your conversations private while giving you full control over your communication infrastructure.
Matrix/Element (Best for Federation)
Matrix is a decentralized protocol. Element is the most popular client. Great for privacy and cross-server communication.
# Synapse (Matrix server) with Docker
version: "3.8"
services:
synapse:
image: matrixdotorg/synapse:latest
volumes:
- ./synapse:/data
environment:
- SYNAPSE_SERVER_NAME=matrix.yourdomain.com
- SYNAPSE_REPORT_STATS=no
ports:
- "8008:8008"- End-to-end encryption by default
- Federate with other Matrix servers
- Bridge to Slack, Discord, Telegram
Mattermost (Best Slack Alternative)
services:
mattermost:
image: mattermost/mattermost-team-edition:latest
volumes:
- ./mattermost/config:/mattermost/config
- ./mattermost/data:/mattermost/data
ports:
- "8065:8065"
environment:
- MM_SQLSETTINGS_DRIVERNAME=postgres
- MM_SQLSETTINGS_DATASOURCE=postgres://mm:password@db/mattermost- Most Slack-like experience
- Excellent mobile apps
- Integrations and plugins
Recommendation
For teams: Mattermost - familiar UI, easy adoption
For privacy: Matrix - E2E encryption, federation
For features: Rocket.Chat - video calls, omnichannel
