The Open Source Slack Alternative
More than just channel-based messaging. We give you everything you need to boost your team’s productivity, complete with on-prem options for full control of your data.
Teams that use Mattermost instead of Slack
Team messaging + project management + workflow automation
The flexibility and extensibility that Slack lacks
Your tools should be tailored to fit the way your team works. Mattermost is the only open source collaboration platform that gives you the ability to customize, extend, and build bespoke integrations — including legacy systems.
- 34,000+ GitHub™ Stars
- 30,000+ total contributions
- 4,000+ contributors
The OSS CommunityMattermost
More deployment options than Slack
From governments and intelligence organizations to financial services and healthcare companies, teams in high-security and regulated industries trust Mattermost for secure collaboration.
Choose from on-prem and private cloud deployment options that meet your security and compliance needs and let you retain full control and sovereignty over your data at all times. Deploy in air-gapped and other high-security environments, use EMM for secure mobile comms, and define granular controls for enterprise data archiving to keep data properly secured and accessed.
Designed for agile teams
Mattermost goes beyond general purpose collaboration, with features designed to help developer teams collaborate on code, execute sprints, deploy releases, and manage outages and support escalations.
Channel-based collaboration with powerful automation and tool integrations to raise messaging to the level of a CLI.
Playbooks for structured workflows that require repeatable execution with predictable outcomes.
Boards for project and product teams that need to manage deliverables, hit their milestones, and stay aligned.