Mattermost
Open SourceSelf-hostableSecure team messaging for technical teams.
4.533K starsAlternative to Slack, Microsoft Teams
Overview
Mattermost is a self-hosted messaging platform built for developer and security-conscious teams. It offers channels, threads, integrations, and workflow automation with deep compliance and on-prem control.
Why pick Mattermost over Slack
- Own your data instead of trusting Slack's servers
- No per-seat pricing — grow without ballooning costs
- Mattermost is open source: audit it, fork it, extend it
- Self-host for full privacy and compliance control
Key features
- Channels, threads, and direct messages
- Slash commands and integrations
- Playbooks for incident response
- SSO, LDAP, and compliance exports
- Self-hosted with full data control
Pros & cons
Screenshots
Installation
Run with Docker
docker run -d --name mattermost -p 8065:8065 mattermost/mattermost-team-editionFrequently asked questions
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