Mattermost

Name: Mattermost
Brand: Mattermost
Price: 10 USD
Rating: 4.3 (596 reviews)

Unclaimed Editor reviewed

Open-source team collaboration platform

Communication Team Chat Internal Comms

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4.3(596 across the web)

FreemiumVisit Website

Reviews onG2CapterraSourceForge

596 reviews tracked

The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

Open source Slack alternative

Biggest con

Less polished than Slack

TL;DR - Mattermost

Mattermost is an open-source messaging platform for secure team collaboration
It provides channels, threads, and integrations with self-hosting options
Free self-hosted, Cloud from $10/user/month

Pricing: Free plan available

Best for: Growing teams

4.3/5 across review platforms

What is Mattermost?

Editorial review

Mattermost provides team messaging you can self-host. Slack alternative for organizations that need data control-chat on your infrastructure. Self-hosting keeps conversations private. The features match commercial alternatives. Enterprise features exist. Organizations needing private team chat choose Mattermost for self-hosted messaging.

Available on: Web, iOS, Android, Windows, macOS, Linux

LCLouis CorneloupUpdated May 26, 2026 · how we evaluateSourcemattermost.com ↗

Pros & Cons

Pros

Open source Slack alternative
Self-hostable
Good for compliance
No per-user cloud cost
Customizable

Cons

Less polished than Slack
Smaller integration library
Self-hosting required for best value
Learning curve
Community smaller

Ratings Across the Web

4.3(596 reviews)

SourceForge67 reviews

4.3/5

Ratings aggregated from independent review platforms. Learn more

Key Features

Team collaborationSelf-hostedChannelsIntegrationsDevOpsOpen source

Pricing Plans

Free Trial

Free

Self-hosted
Up to 250 users
Basic messaging

Professional

$10/user/month

AD/LDAP sync
SSO
Guest accounts

Enterprise

Custom

Custom compliance
EMM support
24/7 support

Calculate your cost View full pricing

How Mattermost's pricing compares

At $10/mo, Mattermost is the most premium of its 4 direct competitors.

$2.5

$6.25

$8.75

Mattermost

$10

Entry paid plan, monthly.

Reviews

4.3/5

Across 596 verified user reviews on G2, Capterra, SourceForge

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Best Mattermost Alternatives

Top alternatives based on features, pricing, and user needs.

View full list →

Microsoft TeamsFreemium

Unite chat, meetings, and files with Microsoft 365

4.4

SlackFreemium

Central hub for workplace communication and collaboration

4.5

ZoomFreemium

Connect, communicate, and collaborate with HD video meetings

4.5

DiscordFreemium

Your place to talk and hang out

4.4

NextcloudFreemium

Open source content collaboration platform for secure, self-hosted data control and remote teamwork.

4.5

Troop MessengerFreemium

AI-first team collaboration and instant messaging app for enterprises.

4.7

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

All Mattermost alternatives6+ tools ranked, pricing + verdict per pick Mattermost vs Microsoft TeamsHead-to-head: features, pricing, who wins Mattermost vs SlackHead-to-head: features, pricing, who wins Mattermost vs ZoomHead-to-head: features, pricing, who wins

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Mattermost FAQ

Is Mattermost free?

Mattermost Team Edition is free and open source for unlimited users. Enterprise plans start at $10 per user per month.

What is Mattermost?

Mattermost is a self-hosted team collaboration platform. It's an open source alternative to Slack that you can run on your own servers for complete data control.

Mattermost vs Slack?

Mattermost can be self-hosted giving you data sovereignty. Slack is cloud-only but more polished. Choose Mattermost if you need on-premises deployment or strict compliance.

Source: mattermost.com

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