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Mattermost vs Slack
How the two compare on license, platforms and what the community thinks.
Key differences
- Mattermost is open source; Slack is freemium.
- Only Mattermost is available on Self-hosted.
| Feature | Mattermost | Slack |
|---|---|---|
| What it is | Open source platform for developer collaboration | Where work happens |
| License | Open source | Freemium |
| Web | ||
| Windows | ||
| macOS | ||
| Linux | ||
| iOS | ||
| Android | ||
| Self-hosted | ||
| Rating | No reviews yet | No reviews yet |
| Alternatives listed | 0 | 7 |
| Page views | 401 | 454 |
About Mattermost
Mattermost is an open-source, self-hostable Slack alternative built for organizations that need control over their data. Channels, playbooks and integrations mirror commercial team chat while keeping everything on your own infrastructure.
About Slack
Slack is the channel-based messaging platform that organizes team communication by topic. It integrates with thousands of tools, supports huddles and clips, and replaces long email threads with searchable conversations. Free tier limits message history; paid plans unlock archives and workflow automation.