Mattermost

Mattermost

Mattermost is an open-source, self-hosted team communication platform designed for organizations requiring high security and data control. It offers Slack-like messaging with advanced compliance features, making it ideal for technical teams, government agencies, and enterprises with strict data sovereignty requirements.

Free plan available

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Features

Self-hosted or cloud deployment options
End-to-end encrypted messaging and file sharing
Extensive integrations with DevOps tools and workflows
Advanced compliance and audit controls
Voice calls and screen sharing
Customizable with plugins and APIs

Pros & Cons

Pros

  • +Complete data ownership and control with self-hosting
  • +Strong security and compliance features for regulated industries
  • +Open-source with active community and transparent development
  • +Deep integrations with developer tools like GitLab, Jira, and Jenkins

Cons

  • -Self-hosted version requires technical expertise to deploy and maintain
  • -User interface feels less polished compared to Slack
  • -Smaller app marketplace and fewer third-party integrations than competitors

Pricing

PlanPriceFeatures
Free$0/moUnlimited users, Unlimited message history, 10GB file storage, Integrations with third-party tools
Professional$10/user/moEverything in Free, AD/LDAP authentication, Guest accounts, Advanced permissions, 24/5 support
EnterpriseCustom pricingEverything in Professional, SAML authentication, Advanced compliance features, High availability deployment, 24/7 premium support

Quick Info

Starting Price
Free
Features
6 listed

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