Mattermost vs Slack

A side-by-side comparison to help you pick between Mattermost and Slack.

Mattermost

Freemium

Open-source Slack alternative

Communication

Mattermost is a self-hostable messaging platform for teams.

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Slack

Freemium

Where work happens

Communication

Slack brings your team communication and collaboration into one place.

Visit website →See more alternatives

Mattermost or Slack: how to choose

Both Mattermost and Slack compete in similar territory. Mattermost sits in the Communication category, covering similar use cases.The right choice usually comes down to pricing model, integrations, and how the tool fits the rest of your stack.

If pricing is the main concern, Mattermost is freemium and Slack is freemium. For deeper comparisons, check the dedicated alternatives page for each tool above.