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Chat & Collaborationby Mattermost, Inc.
Mattermost
Secure, self-hosted chat infrastructure alternative to Slack.
About Mattermost
Mattermost is an open-source, self-hosted messaging platform for teams. It provides channels, direct messages, threads, file sharing, search, and integrations via webhooks and bots. Designed as a secure, compliant alternative to Slack for organizations that need data sovereignty.
Key Features
- Secure, self-hosted team messaging with Slack-like experience
- Channels, threads, file sharing, and integrations via webhooks
- Granular compliance: data retention, eDiscovery, and audit logs
- Playbooks for structured incident response and workflows
Self-Hosting Notes
Go-based server, React-based client. Requires PostgreSQL. Docker deployment available. Enterprise features available in paid editions.
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