Mattermost is a flexible, open source messaging platform
that enables secure team collaboration
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, or build out custom workflows that scale to tens of thousands of concurrent users.
Many of the world’s leading privacy-conscious enterprises work better with Mattermost by connecting people, tools, and automation to increase collaboration.
DevOps teams use Mattermost to power collaboration at every stage of the DevOps lifecycle. Mattermost unifies people, tools, data, and automations to help your team increase innovation and agility.
Learn howMattermost 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.
For engineers, modern collaboration means more than just group chat. While Microsoft Teams can meet the needs of some business users who need a simple chat solution, developers need the power to connect services, proprietary systems, and complex workflows without limiting their autonomy.
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.
Restrict actions in Mattermost to authorized users only
Maintain service during outages through the use of clustered infrastructure
Deploy highly efficient database searches in a cluster environment
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.
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
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