Communication / Comparison
Mattermost vs Slack
- Mattermost: free plan; paid plans vary, free plan yes. Slack: from $7.25 a month, free plan yes. Plans differ, so check what each price includes.
| Mattermost Self-hosted team chat with workflows, calls and AI | Slack Team chat with channels, huddles, workflows and AI | |
|---|---|---|
| Starting price | Free plan; paid plans vary | From $7.25 a month |
| Free plan | Yes | Yes |
| Pricing in detail | The core is open source under the MIT licence and free to run on your own server; some enterprise features need a paid licence. A free cloud trial is also offered. | Free plan with 90 days of history and up to 10 apps. Pro is $7.25 per user a month billed annually ($8.75 monthly); Business+ $15 ($18 monthly). Enterprise+ on request. |
| User rating | No reviews yet | No reviews yet |
| Company | Mattermost, Inc. | Slack (Salesforce) |
| Works with | Not listed | Google Drive, Zoom, Asana, Salesforce, Jira, GitHub, Notion |
| Facts checked on | 22 Oct 2026 | 20 Oct 2026 |
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