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Mattermost

Self-hosted team chat for private cloud and air-gapped networks

88.5score

Ranked 4 of 7 in best team chat software

Self-hosted team chat for private cloud and air-gapped networks, with source published under AGPL-3.0. It asks more of an IT team than Slack, and its Enterprise features sit in paid editions.

Best for Regulated teams that must keep chat on their own servers

About Mattermost

Mattermost is a team messaging platform for chat channels, direct messages and automation. Its site describes it as zero-trust collaboration and automation for private cloud, self-hosted and air-gapped environments, and it lists an Enterprise Advanced edition for multi-domain secure operations. Developers can extend it through its platform and apps.

The source code is published, and the company licenses it under AGPL-3.0 or a commercial license for its Enterprise products. Self-hosting is the main reason to choose Mattermost, since the company's own pages focus on government, critical infrastructure and regulated firms. Compared with Slack, it asks more of the IT team, but the organization keeps control of the server and the data.

Key features

  • Self-hosted team chat
  • Air-gapped deployment
  • Open source platform
  • Enterprise editions for regulated teams

Strengths

  • Open source with self-hosting on your own servers
  • Works in private cloud and air-gapped networks
  • Source published under AGPL-3.0

Limits

  • Running the server needs an IT team
  • Enterprise features are only in paid editions

Where Mattermost ranks

ListRankScoreBest for
Best Team chat software4 of 788.5Regulated teams that must keep chat on their own servers

Questions about Mattermost

Is Mattermost free?
Mattermost can be used without paying: Source is open; paid Enterprise editions for organizations. Check the vendor’s pricing page for current limits.
Is Mattermost open source?
Yes. Mattermost publishes its source code under the AGPL-3.0 license.
Which platforms does Mattermost support?
Mattermost is available on: Web, Self-hosted.
What is Mattermost best for?
Regulated teams that must keep chat on their own servers. In our ranking of team chat software it is number 4 of 7 with a score of 88.5.
What are the best alternatives to Mattermost?
The highest-ranked alternatives on listme.name are Slack, Zulip, Microsoft Teams, Zoho Cliq.