Flock vs Mattermost: Which is Better in 2026?
Choosing between Flock 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 Flock if you need team chat.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Flock
Team messaging and collaboration platform
Best for you if:
- • You need team chat features specifically
- • Flock is a team messaging platform offering chat, video calls, and productivity tools
- • It combines communication with built-in to-dos, polls, and file sharing
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 |  Flock |  Mattermost |
|---|---|---|
Starts at | Free tier + paid plansFree tier available | $10/moProfessional |
Best For | Team Chat | Communication |
Rating | - | - |
Choose Flock or Mattermost?
Choose Flock if
Team messaging and collaboration platform
- Simple team messaging
- Video calls included
- Affordable
- Your work is team chat-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 team chat-shaped
| Feature | Flock | Mattermost |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | ★4.6/5 352 reviews | ★4.3/5 596 reviews |
| Categories | Team ChatCommunication | CommunicationTeam Chat |
In-Depth Analysis
Flock
Team messaging and collaboration platform
Strengths
- +Simple team messaging
- +Video calls included
- +Affordable
- +To-do integration
- +Good for small teams
Weaknesses
- -Smaller user base
- -Limited integrations
- -Less features than Slack
- -Mobile apps okay
- -Less known
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: Flock vs Mattermost
| Plan | Flock | Mattermost |
|---|---|---|
| Tier 1 | Free Starter | Free Free |
| Tier 2 | /user/month Pro | $10 Professional |
| Tier 3 | custom Enterprise | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Flock pricing and Mattermost pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Flock
Want the highest-rated option?
Neither has user reviews yet.
Go with: Flock
Value user reviews?
Neither has user reviews yet.
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?
Flock is a team chat tool. Mattermost is in communication. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Mattermost
- Larger review base (596 reviews)
- Free tier available
- Our pick for this comparison
Flock
- Higher user rating: 4.6/5 vs 4.3/5
- Better fit for team chat
The Bottom Line
Mattermost is our pick.
Frequently Asked Questions
Is Flock or Mattermost better?
Mattermost is rated in our evaluation. Both are freemium.
What are Flock and Mattermost used for?
Flock: Team messaging and collaboration platform. Mattermost: Open-source team collaboration platform.
What does Flock cost vs Mattermost?
Flock is freemium (free tier + paid plans). Mattermost is freemium (free tier + paid plans). Visit their websites for detailed pricing.