Mattermost vs Flock
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
Mattermost ranks higher on Top 11 (#6 vs #7) for Remote and hybrid teams choosing a messaging and collaboration platform. Top open-source platform for teams needing total data control.
At a glance
| Mattermost | Flock | |
|---|---|---|
| Top 11 rank | #6 / Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026 | #7 / Slack vs Microsoft Teams vs Discord: 11 Best Team Communication Tools 2026 |
| Score (out of 9.4) | 8 | 7.8 |
| Best for | High-security and self-hosted needs | SMBs seeking an affordable all-in-one |
| Pricing | $$ ($10/user/mo) | $ ($4 to $8/user/mo) |
| HQ | Palo Alto, USA | Mumbai, India |
| Founded | 2016 | 2014 |
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
Flock
Great value with built-in productivity tools for SMBs.
www.flock.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.