Slack vs Mattermost: Which Should You Choose in 2026?
Choosing between Slack and Mattermost comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated April 14, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Slack
Where work happens
Best for you if:
- 0
- • You need workflow automation features specifically
- • Channel-based messaging platform with 2,600+ integrations, huddles, Canvas docs, and workflow automation
- • Free plan covers basics (90-day history, 10 apps); paid plans start at $7.25/user/month with unlimited history
Mattermost
Open-source team collaboration platform
Best for you if:
- 0
- • You need team chat features specifically
- • Mattermost is an open-source messaging platform for secure team collaboration
- • It provides channels, threads, and integrations with self-hosting options
| At a Glance |  Slack |  Mattermost |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | Workflow Automation | Team Chat |
Rating | — | — |
| Feature | Slack | Mattermost |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Workflow Automation | Team ChatScreen Sharing |
How Slack and Mattermost Compare
Slack
Where work happens
Free tier available
Mattermost
Open-source team collaboration platform
Free tier available
Slack is a workflow automation tool. Mattermost is in team chat.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Slack
Want the highest-rated option?
Neither has user reviews yet.
Go with: Slack
Value user reviews?
Neither has user reviews yet.
Go with: Slack
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Slack is a workflow automation tool. Mattermost is in team chat. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Slack
- 0
- Free tier available
- Our pick for this comparison
Mattermost
- Better fit for team chat
The Bottom Line
Slack is our pick.
Frequently Asked Questions
Is Slack or Mattermost better?
Slack is rated high in our evaluation. Both are freemium.
What are Slack and Mattermost used for?
Slack: Where work happens. Mattermost: Open-source team collaboration platform.
What does Slack cost vs Mattermost?
Slack is freemium (free tier + paid plans). Mattermost is freemium (free tier + paid plans). Visit their websites for detailed pricing.