Mattermost
An open source, self-hosted collaboration platform with chat, workflow automation, voice calling, screen sharing, and AI integration.
What is Mattermost?
Mattermost is an open-source, self-hosted collaboration platform that provides secure team communication tools like chat, voice calling, screen sharing, and workflow automation. It is designed to support the entire software development lifecycle, enabling DevOps, incident resolution, and IT service desk workflows while keeping data on-premises.
Development, security, and operations (DevSecOps) teams, IT departments, and organizations requiring secure, self-hosted collaboration tools with compliance and data sovereignty needs.
Developers choose Mattermost for its self-hosted deployment, which offers greater security and control over communication data compared to cloud-based alternatives, along with extensive integration capabilities and a familiar chat interface.
Overview
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
Use Cases
Best For
- DevSecOps teams needing secure, integrated communication for CI/CD pipelines
- Organizations requiring on-premises chat for compliance and data sovereignty
- Incident response teams coordinating real-time during outages or security events
- IT service desks managing internal support requests and workflows
- Development teams collaborating across channels with code integrations
- Companies seeking an open-source alternative to Slack or Microsoft Teams
Not Ideal For
- Organizations with no dedicated IT staff for self-hosted deployment and ongoing maintenance
- Teams primarily using non-development tools (e.g., marketing or sales suites) where DevSecOps integrations are insufficient
- Small, casual groups seeking a simple, free cloud chat app with zero administrative overhead
Pros & Cons
Pros
Self-hosted deployment ensures data sovereignty and compliance, as emphasized in security bulletins and on-premises focus, keeping communication data entirely under organizational control.
Integrates real-time chat, voice calling, screen sharing, and AI capabilities into one platform, providing a full-featured alternative to cloud-based tools for team communication.
Supports over 700 integrations via APIs, webhooks, and plugins, enabling seamless connections with development tools like CI/CD pipelines and incident management systems.
Offers native desktop and mobile apps for Windows, macOS, Linux, Android, and iOS, ensuring team access from any device with a consistent experience.
Cons
Self-hosting demands ongoing maintenance, security updates, and database management, which can strain teams without dedicated DevOps resources, as noted in the deployment guides.
Deployment involves configuring PostgreSQL and choosing from multiple installation methods (e.g., Docker, Kubernetes), requiring technical expertise and time investment.
While extensible, the platform's default integrations heavily favor software development workflows, potentially lacking out-of-the-box support for other business functions like HR or finance.
Open Source Alternative To
Mattermost is an open-source alternative to the following products:
Frequently Asked Questions
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