Rock vs Mattermost: Which is Better in 2026?
Choosing between Rock 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 wins this matchup. Microsoft Teams is our overall Communication pick. Microsoft Teams is our free Communication pick. Pick Rock if you need a free tier to start with.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Rock
Simplify teamwork with integrated chat, tasks, and notes in one affordable workspace.
Best for you if:
- • You want reduces tool-switching by centralizing communication and project management
- • You want affordable flat pricing without per-user fees, ideal for growing teams
Mattermost
Open-source team collaboration platform
Best for you if:
- • You want open source Slack alternative
- • You want self-hostable
| At a Glance | Rock | Mattermost |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Communication | Communication |
Rating | - | 4.3/5G2 4.3 · Capterra 4.4 · SourceForge 4.3 |
Free plan | Yes | Yes |
Choose Rock or Mattermost?
Choose Rock if
Simplify teamwork with integrated chat, tasks, and notes in one affordable workspace.
- You want reduces tool-switching by centralizing communication and project management
- You want affordable flat pricing without per-user fees, ideal for growing teams
Choose Mattermost if
Open-source team collaboration platform
- You want open source Slack alternative
- You want self-hostable
| Feature | Rock | Mattermost |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | No ratings yet | ★4.3/5 604 reviews |
| Categories | CommunicationTask Management | CommunicationTeam Chat |
In-Depth Analysis
Rock
Simplify teamwork with integrated chat, tasks, and notes in one affordable workspace.
Rock's pricing is quite generous, especially with its robust Free Forever plan offering significant features for small teams.
Strengths
- +Reduces tool-switching by centralizing communication and project management.
- +Affordable flat pricing without per-user fees, ideal for growing teams.
- +Seamless collaboration with external partners (clients, freelancers).
- +Comprehensive search functionality for all content.
- +User-friendly interface with quick setup.
Weaknesses
- -Can be pricy for really small teams
Key features
Mattermost
Open-source team collaboration platform
Mattermost's pricing is fair, offering a generous Free tier for small teams.
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: Rock vs Mattermost
| Plan | Rock | Mattermost |
|---|---|---|
| Tier 1 | Free Free Forever | Free Free |
| Tier 2 | $74.92/mo Unlimited | $10 Professional |
| Tier 3 | N/A | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Rock pricing and Mattermost pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Rock
Want the highest-rated option?
Mattermost is rated 4.3/5. Rock has no ratings yet.
Go with: Mattermost
Value user reviews?
Rock: no ratings yet. Mattermost: 604 reviews (4.3/5).
Go with: Mattermost
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?
Both are communication tools. Compare their specific features to decide.
How important are ratings?
Mattermost is rated 4.3/5; Rock has no ratings yet.
Key Takeaways
Mattermost
- Free tier available
- Our pick for this comparison
Rock
- Choose if you want simplify teamwork with integrated chat, tasks, and notes in one affordable workspace
The Bottom Line
Mattermost wins this matchup. Microsoft Teams is our overall Communication pick. Microsoft Teams is our free Communication pick.
Frequently Asked Questions
Is Rock or Mattermost better?
Mattermost is rated in our evaluation. Both are freemium.
What are Rock and Mattermost used for?
Rock: Simplify teamwork with integrated chat, tasks, and notes in one affordable workspace.. Mattermost: Open-source team collaboration platform.
What does Rock cost vs Mattermost?
Rock is freemium (free tier + paid plans). Mattermost is freemium (free tier + paid plans). Visit their websites for detailed pricing.