Forum vs Mattermost: Which is Better in 2026?
Choosing between Forum 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.
Bottom line: Mattermost is our overall pick for communication workflows. Pick Forum if you need community platforms.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Forum
Connect, collaborate, and grow your community with a powerful forum platform.
Best for you if:
- • You need something completely free
- • You need community platforms features specifically
- • Online community platform for creating and managing discussion forums
- • Supports topic threads, user roles, moderation, and private messaging
Mattermost
Open-source team collaboration platform
Best for you if:
- • You need communication 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 |  Forum |  Mattermost |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Community Platforms | Communication |
Rating | - | 4.3/5 |
Choose Forum or Mattermost?
Choose Forum if
Connect, collaborate, and grow your community with a powerful forum platform.
- Structured discussions preserve knowledge better than chat platforms
- Persistent content remains searchable and accessible over time
- Builds engaged communities around shared interests or products
- You want a fully free tool (Mattermost requires payment)
- Your work is community platforms-shaped, not communication-shaped
Choose Mattermost if
Open-source team collaboration platform
- Open source Slack alternative
- Self-hostable
- Good for compliance
- Your work is communication-shaped, not community platforms-shaped
| Feature | Forum | Mattermost |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | No ratings yet | ★4.3/5 596 reviews |
| Categories | Community PlatformsCommunication | CommunicationTeam Chat |
In-Depth Analysis
Forum
Connect, collaborate, and grow your community with a powerful forum platform.
Strengths
- +Structured discussions preserve knowledge better than chat platforms
- +Persistent content remains searchable and accessible over time
- +Builds engaged communities around shared interests or products
- +Customizable to match organizational branding and needs
Weaknesses
- -Requires active moderation to maintain content quality
- -Can be slower-paced than real-time chat tools
- -User adoption requires ongoing community management effort
Key features
Mattermost
Open-source team collaboration platform
Strengths
- +Open source Slack alternative
- +Self-hostable
- +Good for compliance
- +No per-user cloud cost
- +Customizable
Weaknesses
- -Less polished than Slack
- -Smaller integration library
- -Self-hosting required for best value
- -Learning curve
- -Community smaller
Key features
Pricing: Forum vs Mattermost
| Plan | Forum | Mattermost |
|---|---|---|
| Tier 1 | N/A | Free Free |
| Tier 2 | N/A | $10 Professional |
| Tier 3 | N/A | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Forum pricing and Mattermost pricing.
Who Should Use What?
On a budget?
Forum is free. Mattermost is freemium.
Go with: Forum
Want the highest-rated option?
Mattermost is rated 4.3/5. Forum has no ratings yet.
Go with: Mattermost
Value user reviews?
Forum: no ratings yet. Mattermost: 596 reviews (4.3/5).
Go with: Mattermost
3 Questions to Help You Decide
What's your budget?
Forum is free. Mattermost is freemium. Go with Forum if free matters most.
What's your use case?
Forum is a community platforms tool. Mattermost is in communication. Pick the category that matches your needs.
How important are ratings?
Mattermost is rated 4.3/5; Forum has no ratings yet.
Key Takeaways
Mattermost
- Free tier available
- Our pick for this comparison
Forum
- Completely free
- Better fit for community platforms
The Bottom Line
Mattermost is our pick. That said, Forum is free, hard to beat on price.
Frequently Asked Questions
Is Forum or Mattermost better?
Mattermost is rated in our evaluation. Forum is free and Mattermost is freemium.
What are Forum and Mattermost used for?
Forum: Connect, collaborate, and grow your community with a powerful forum platform.. Mattermost: Open-source team collaboration platform.
What does Forum cost vs Mattermost?
Forum is completely free. Mattermost is freemium (free tier + paid plans). Visit their websites for detailed pricing.