Mattermost

Actively maintained

Secure collaboration for developers

Communication
Stars
★ 39k
Version
v11.9.0
Last commit
1 day, 16 hours ago
Language
TypeScript
Setup
Medium
Min RAM
2048 MB

Metrics verified from the source repo on Aug 7, 2026.

What it is

A self-hosted, Slack-style messaging platform built for developer and DevOps teams — channels, integrations and playbooks on infrastructure you control.

Replaces

SlackMicrosoft Teams

Self-host Mattermost instead of paying for the above.

Highlights

  • Channels, DMs & threads
  • Slack-compatible integrations
  • Self-hosted & compliant

How to deploy

DockerDocker ComposeHelm

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