What it is
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.. Review the official repository, license, release activity, and dep GitHub popularity snapshot captured on 2026-07-16: 38,441 stars and 8,831 forks.
Teams can evaluate Mattermost as an open alternative to Slack while keeping the implementation, license, and repository signals visible. Confirm the official documentation against your exact workflow before treating it as a production dependency.
- Categories
Infrastructure- Alternatives to
SlackChanty
Discord
Microsoft TeamsPumble
Who it’s for — and when to skip it
Infrastructure teams
Use it when deployment control, auditability, and portability are primary requirements.
Skip if the team cannot own patching, monitoring, and incident response.
DevOps engineers
Consider it when automation and configuration can be reviewed and integrated into existing runbooks.
Skip if the project lacks a tested upgrade or rollback path.
Self-hosting teams
Evaluate it when running the service in your environment is a deliberate ownership decision.
Skip if a zero-operations SaaS experience is non-negotiable.
Strengths and trade-offs
Why teams consider it
hacktoberfest
react
golang
Source code and NOASSERTION license are visible before adoption
Repository activity is available as a current maintenance signal
What to validate
A public repository does not automatically guarantee a documented self-hosting path
GitHub popularity is not a security, quality, or product-fit guarantee
The NOASSERTION license still needs review against your distribution and commercial model
Support quality, migration effort, and production hardening vary by project
Pricing
Free Team Edition; Enterprise Edition is commercial
Self-hosted Team Edition is free. Enterprise adds advanced compliance and scale features.
Team Edition
$0Self-hosted- Core team messaging
- Channels and integrations
- Community support
Enterprise
CustomCommercial license- Advanced compliance
- High availability options
- Official support
Capabilities and stack fit
Catalog metadata supports discovery, not installation. Verify supported versions, dependencies, deployment topology, and production requirements in the official repository.
Guides for Mattermost
Use the learning library to find a guide by technology, category, or difficulty.
Browse guidesRelated articles
Approved community reviews
We do not display synthetic testimonials or ratings without sufficient moderated data.
Before you adopt it
- 01
Read the license and confirm it fits your intended use and distribution model.
- 02
Review recent commits, open issues, releases, and the maintainer response pattern.
- 03
Run a small proof of concept with representative data, users, and integrations.
- 04
Confirm whether an official deployment or self-hosting guide exists.
- 05
Document an export or migration path before storing critical data.
