Slack vs Mattermost
A detailed comparison of Slack and Mattermost to help you choose the best tool for your needs in 2026.
Slack
Slack is a business communication platform offering workplace chat, tools, and services all within one platform.
PRICING
Mattermost
Open-source Slack alternative, self-hostable, enterprise-grade
RATING
Live Data
Slack
Mattermost
💡 Data sourced from FMHY (Free Media Heck Yeah) and updated regularly. GitHub stars reflect real-time community adoption.
Side-by-Side Comparison
Detailed breakdown of features, pricing, and capabilities
| Feature | Slack | Mattermost |
|---|---|---|
| Price | Paid See website | Free |
| Open Source | ||
| Self-Hosted | — | |
| User Rating | — | |
| Migration Difficulty | N/A | — |
| Best For | General use | — |
Why Choose Mattermost Over Slack?
Open-source Slack alternative, self-hostable, enterprise-grade
KEY FEATURES
Pros & Cons
Slack
KNOWN FOR
Slack is a business communication platform offering workplace chat, tools, and services all within one platform....
PAIN POINTS
Mattermost
Why Consider Switching from Slack?
Save money by switching to a free alternative to Slack
Get more features with open-source alternatives
Avoid vendor lock-in and own your data
Common Slack Pain Points
Impact:
Impact:
Impact:
Impact:
How to Migrate from Slack to Mattermost
Frequently Asked Questions
Can I import Slack history to Discord?
Not natively, but third-party tools like Slack to Discord importer can help. Note: Discord has a different structure (servers vs workspaces).
Is Mattermost really free?
The core open-source version is free. Mattermost makes money on enterprise add-ons (AD/LDAP, compliance, etc.).