Mattermost vs Slack: Detailed Comparison (2026)
Feature Comparison
| Feature | ||
|---|---|---|
| Help Desk | ||
| Live Chat | Channels and DMs | |
| Project Management | ||
| File Attachments | ||
| CRM | ||
| API Access | ||
Free plan available
Very affordable starting price
Strong user satisfaction ratings
Real-time messaging
File sharing built-in
Notification overload without proper settings
Feature overlap with other tools
Excellent channel organization
Massive integration ecosystem
Powerful search functionality
Great for async communication
Can be distracting with notifications
Free plan limits message history
Expensive for large organizations