Mattermost vs Slack
Both are strong Communication & Collaboration tools — here's how they stack up so you can pick the right one.
Compared as of July 2026
| Attribute | ||
|---|---|---|
| Category | Communication & Collaboration | Communication & Collaboration |
| Pricing | Open Source | Freemium |
| Platforms | Web, macOS, Windows, Linux, iOS, Android | Web, macOS, Windows, iOS, Android, Linux |
| Rating | — | — |
| Best for | — | — |
| Editor's take | — | — |
Which should you choose?
Mattermost
Open-source, self-hostable team chat.
Slack
Business messaging and channel-based collaboration