Mattermost
6.9#48 in team chat appsAndroidiOSWebLinux
VisitMattermost vs Slack
What both publish
| Fact | Mattermost | Slack |
|---|---|---|
| Channels | Yes | Yes |
| Free plan | Yes | Yes |
| Guest access | Yes | Yes |
| Integrations | GitHub,GitLab,Jira,Microsoft Teams,Microsoft 365,Outlook,ServiceNow,Zoom,Pexip,Splunk,Zapier | Salesforce,Jira,Google Drive,ChatGPT,Asana,Miro,Notion,Zoom,GitHub,GitLab,PagerDuty,Box,Dropbox,Zendesk,Freshdesk,HubSpot |
| Message history | unlimited | limited |
| Supported platforms | web,Windows,macOS,Linux,iOS,Android,API,self-hosted | web,windows,macos,linux,ios,android,api |
Mattermost plans
- ProfessionalPriced on request
- Professional—
- EnterprisePriced on request
- Enterprise—
Slack plans
- FreeFree
- Pro$8.75 a month
- Business+$18 a month
- Enterprise+Priced on request
Pick Mattermost if…
You want what its maker publishes above — check its page for the details.
Pick Slack if…
Slack suits teams that coordinate through channels and connected apps, or need guest and external messaging options. Free workspaces fit users who can work within the 90-day history and ten-app limits.