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Mattermost

Communication · mattermost.com

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Engineering, security and operations teams use Mattermost, a self-hosted messaging platform with channels, group calls, playbooks and workflow automation, for chat, incident response and DevSecOps coordination on their own infrastructure. Small teams can also run a free Entry edition that carries usage limits.

Facts at a glance

FactValueSource
CompanyMattermost, Inc., Palo Alto, California, USAmattermost.com/privacy-policy, checked 14 Nov 2026
Free planFreemium: a free plan existsdocs.mattermost.com/product-overview/editions-and-offerings.html, checked 14 Nov 2026
Free trialYesdocs.mattermost.com/product-overview/editions-and-offerings.html, checked 14 Nov 2026
PlatformsWindows, macOS, Linux, iOS, Android, Self-hostedmattermost.com/apps, checked 14 Nov 2026

Pricing & plans

Starts at

Contact sales

no price published

Model

Freemium

Free plan available

Trial

Yes

Price tiers

PlanPer monthUsage, as the vendor states it
EntryFreeFree self-hosted mode of the Enterprise edition; message history capped at 10,000 and community support only
ProfessionalPaid tier with the core ChatOps capabilities; pricing through sales
EnterpriseAdds enterprise-scale search with dedicated indexing to the Professional capabilities; pricing through sales
Enterprise AdvancedAdds zero trust attribute-based policy controls and air-gapped deployment workflows; pricing through sales

Prices are the vendor's list prices in USD. Source: docs.mattermost.com/product-overview/editions-and-offerings.html, checked 14 Nov 2026.

  • Professional and Enterprise plans list no amounts and are bought through the sales team

Source: mattermost.com/pricing, checked 14 Nov 2026

Alternatives

Slack: A hosted free plan with no time limit keeps 90 days of message history and allows up to 10 apps.

Rocket.Chat: Federates natively with Matrix and XMPP, and its Starter edition can run on a team's own infrastructure.

Zulip: Organizes conversations into topics within channels, with messages that can be moved and topics renamed or split afterwards.

Sources: slack.com/pricing, rocket.chat/pricing, zulip.com/why-zulip

Mattermost Free, in practice

What the free plan covers and where it stops.

Free plan limits

  • Message history capped at 10,000 across all channels
  • Community support only
  • No compliance features such as legal hold and data retention
  • No high availability or clustered deployment
  • No delegated granular system administrator roles

Sources: docs.mattermost.com/product-overview/editions-and-offerings.html

Features & platforms

  • Self-hosting on own infrastructure

  • Single sign-on with SAML, OIDC and OAuth

  • Read-only, restricted and locked channels

  • Jira, GitHub and GitLab integrations for DevSecOps

  • Self-hosted group audio calls and screen sharing

  • Guest accounts and custom user groups

  • Windows
  • macOS
  • Linux
  • iOS
  • Android
  • Self-hosted

Sources: mattermost.com/pricing, mattermost.com/apps, mattermost.com/download, checked 14 Nov 2026

Data & privacy

  • Personal information is retained only as long as the described purposes need, unless the law requires longer

  • People in the EEA, UK and Switzerland may have rights to access, correct, delete, restrict or object to certain processing

  • International transfers of personal information use safeguards required by applicable law

Privacy policy

Source: mattermost.com/privacy-policy, policy last updated December 30, 2024, checked 14 Nov 2026. These points restate the policy and are not legal advice.

Also in Communication on Tools.us.org: Bubbles, Campsite, Circle, Clarityflow, Discord, Discourse, Google Meet, Grain, Loom, Mimestream, Otter.ai, Shortwave, Slack, Supernormal, Thunderbird, Zoom

Sources and dates

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