Teams that use Mattermost instead of Slack
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.
- 25,000+ 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.
Robust integrations with essential third-party developer tools surface exactly the functionality your team needs, when they need it, for better context and faster response times.
Don’t just take our word for it
Mattermost vs. Slack Platform Comparison
Learn why technical teams and organizations prefer Mattermost for mission-critical workflows and collaboration.
Open source software
Open source codebase is supported by community contributors and is publicly available.
Proprietary software can only be modified by Slack; source code is not publicly available.
On-prem and private SaaS
Deploy on-prem to your own private cloud environment, behind your firewall. Maintain complete control over data, compliance, and security.
Publicly hosted SaaS
Available as a SaaS solution delivered via the public cloud. There aren’t any on-prem or private cloud deployment options.
Feature-rich technical collaboration tools
Everything technical teams need to collaborate — including messaging, Kanban boards, and runbooks — delivered through a unified collaboration suite with unlimited integrations.
Users have messaging functionality out of the box; third-party tools are available for other purposes, but lack tight integration with messaging and require additional licensing and admin fees.
Designed for technical teams
Built for technical and operational collaboration, including DevOps, incident resolution, and release management.
Designed for general business users
Designed for general collaboration for day-to-day activities.
Extend Mattermost through free existing and custom apps. Use custom commands and webhooks to extend functionality, add integrations, and implement custom branding.
Slack offers an app marketplace that enables you to connect to some other tools. But without access to source code, you can’t customize the app to make it truly yours.
Keep your environment safe with advanced team permissions, AD/LDAP group sync, complete access to source code, logs of all server records, infrastructure changes, and user activity, and more.
Less control over security
As a SaaS solution delivered through the public cloud, organizations won’t have access to Slack’s source code, which means they have to trust the platform’s security protocols.