Collaborate securely and privately

Get more done, faster, with team collaboration and messaging that deploys to cloud infrastructure under IT control, as well as on-prem.

Start using Mattermost

Communicate seamlessly at scale

Reach anyone, anywhere on any device. From the airport to data center, safely connect teams with EMM apps, hybrid cloud deployment and enterprise-grade flexibility to meet the unique needs of your enterprise.

Uber can now handle 70,000 users at once, sending 80 to 200 messages per second.

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Connect your tools & optimize workflows

Integrate with existing applications and build new workflows. Empower your teams—especially operations and DevOps—to perform faster and more effectively than ever before.

Over 500 plugins and API access for out-of-the box and custom integrations.

See plugins & API access
Trusted by
Department of Defense
Bristol-Myers Squibb

Meet your security & compliance needs

Customize Mattermost to eliminate shadow IT and ensure compliance with the unique regional, industry-specific and company-specific requirements facing your organization.

A major U.S. Government agency solved its need for secure text-based communications.

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Make your people happy

Empower your teams to bring the speed and ease of messaging from their personal lives to the workplace on a compliant, user-friendly platform under IT control.

FUNKE MEDIENGRUPPE chose Mattermost to accelerate its digital transformation.

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Join the world’s best companies on Mattermost

We deployed Mattermost to increase our agility, efficiency and innovation.

The main metric is employee satisfaction and that’s definitely improved since we introduced Mattermost.

Mattermost exceeded our performance expectations and aligned with our existing technology stack.

How Mattermost works

Get Started, Securely

Ask IT or your innovation group to set up the open source version of Mattermost and pilot the ​messaging experience​.

Just send them this link.

Increase Productivity

Invite your team to organize and simplify your conversations. Experience fewer meetings, less email and faster decisions.

See all the benefits here.

Customize & Scale

Configure Mattermost to meet your unique compliance, integration and ​secure communication​ requirements.

We're here to help. Contact us.

Why open source

Hundreds of contributors around the world help develop Mattermost. Never get locked in, retain complete control of your infrastructure and avoid surprises altogether.

Star Fork

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

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

Organizations are migrating from HipChat, IRC or 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

Bring your messaging and tools together to get more done, faster