High Trust Messaging for the Enterprise

Mattermost is a flexible, open source messaging platform that meets even the most demanding privacy and security standards


Centralize DevOps communication and workflow

Build intuitive workflows and collaborate across large teams without worrying about security or data privacy. Get up and running quickly with hundreds of existing integrations from Mattermost and the community, then build out custom workflows that scale to tens of thousands of concurrent users.

  • Deploy faster by connecting people, files, and systems with workflow
  • Resolve incidents and outages in a trusted, private workspace
  • Integrates securely with most popular DevOps tools (CI/CD, Bots, Git)
  • Highly customizable down to the interface—control the experience

Collaborate securely and privately, enterprise-wide

Many of the world’s leading high-security enterprises work better with Mattermost by connecting people, tools, and automation across tens of thousands of users.

  • Deploys to private cloud and on-prem for full control of data
  • Enterprise-grade security, availability, and scalability
  • Works seamlessly with mobile security and compliance systems
Gartner Cool Vendor

Mattermost is a Gartner Cool Vendor

Mattermost is cool because it gives buyers visibility into the code and enables deeper customization to match exact business models and needs.

  • Migration from legacy services is easy (even with strict compliance)

  • Hybrid deployment model gives enterprises more control over hosting options

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Alternative to Slack

Alternative to Slack

Mattermost is an open source Slack alternative. It's written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL. Use the features you like (file sharing, real-time group chat and webhooks—to name a few) and access the source code.

See Mattermost vs. Slack

Migrate from Hipchat

Migrate from Hipchat

Organizations are migrating from Hipchat, IRC and Rocket.Chat to Mattermost. After Slack acquired Hipchat, customers searched for open source alternatives. And Mattermost became the leading choice for on-premises Atlassian customers.

Migrate from Hipchat to Mattermost

Advanced Permissions

Advanced Permissions

Restrict actions in Mattermost to authorized users only

High Availability

High Availability

Maintain service during outages through the use of clustering infrastructure



Deploy highly efficient database searches in a cluster environment

Privacy-conscious organizations trust Mattermost

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Why Open source

Why open source

Hundreds of contributors around the world help develop Mattermost (we're popular on GitHub). Never get locked in, retain complete control of your infrastructure and avoid surprises altogether.


Explore the docs

Explore the docs

From deployment on your hybrid cloud to end-user and admin guides, learn how to customize Mattermost for your organization.

Over 100 in-depth guides available

See all documentation

Migrate from Hipchat to Mattermost.Learn more