Team Communication · 2026 Comparison
Mattermost vs Slack
Mattermost vs Slack: Compare pricing, features, ratings, pros, and cons. Which is better for your team in 2026? Unbiased comparison with real data.
Mattermost
Free tier
VS
Slack
Free tier
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Quick Verdict
⭐ Better Ratings
Slack
4.5/5 on G2
💰 Better Price
Tie
Similar pricing
🛠️ More Features
Slack
8 tracked features
Mattermost vs Slack — Feature Comparison
| Feature | Mattermost Recommended | Slack |
|---|---|---|
| Starting Price | Free tier | Free tier |
| Pricing Model | Freemium | Freemium |
| G2 Rating | | |
| Founded | 2015 | 2013 |
| Channels | ||
| Direct Messages | ||
| Self Hosting | ||
| Compliance | ||
| Integrations | ||
| Mobile Apps | ||
| Playbooks | ||
| File Sharing | ||
| Search | ||
| Huddles | ||
| Canvas | ||
| Workflow Builder | ||
| Visit Website | Visit site | Visit site |
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Mattermost — Overview
Open source messaging for teams
Open-source, self-hostable team messaging platform with enterprise-grade security and compliance features.
✓ Pros
- ✓Self-hostable for full data control
- ✓Open source and transparent
- ✓Strong security and compliance
- ✓No vendor lock-in
✗ Cons
- ✗Requires technical expertise to self-host
- ✗UI feels less polished than Slack
- ✗Smaller app marketplace
- ✗Setup complexity
✓ Self Hosting
✓ Compliance
✓ Mobile Apps
✓ Playbooks
Slack — Overview
Where work happens
Team messaging and collaboration platform with channels, direct messages, and thousands of integrations.
✓ Pros
- ✓Best-in-class integrations ecosystem
- ✓Intuitive and polished interface
- ✓Powerful search across history
- ✓Excellent mobile apps
✗ Cons
- ✗Expensive at scale ($7.25+/user/month)
- ✗Free tier limits message history to 90 days
- ✗Can be distracting with notification overload
- ✗No built-in video conferencing
✓ File Sharing
✓ Search
✓ Huddles
✓ Canvas
✓ Workflow Builder
Features Both Tools Share
✓ Channels
✓ Direct Messages
✓ Integrations
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