Mattermost vs Slack
Side-by-side from the Top 11 ranking of Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026. Last verified June 17, 2026.
The short answer
Slack ranks higher on Top 11 (#1 vs #6) for Remote and hybrid teams choosing a messaging and collaboration platform. The best overall tool thanks to its unmatched app integrations and intuitive design.
At a glance
| Mattermost | Slack | |
|---|---|---|
| Top 11 rank | #6 / Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026 | #1 / Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026 |
| Score (out of 9.4) | 8 | 9.2 |
| Best for | High-security and self-hosted needs | Teams needing deep app integrations |
| Pricing | $$ ($10/user/mo) | $$ ($8 to $15/user/mo) |
| HQ | Palo Alto, USA | San Francisco, USA |
| Founded | 2016 | 2009 |
Mattermost
Top open-source platform for teams needing total data control.
mattermost.comSee full entry in Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026
Slack
The best overall tool thanks to its unmatched app integrations and intuitive design.
slack.comSee full entry in Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.