Mattermost

What is Mattermost?

Channels, calls, playbooks and AI agents for engineering, security and operations teams.

Who is Mattermost best for?

Mattermost is best for security, engineering and operations teams that need team chat on servers they control.

• Chat that stays on your network

  Messages, files and calls run on your own infrastructure, including air-gapped networks on Enterprise Advanced.

• DevSecOps teams

  Jira, GitHub and GitLab integrations bring updates from those tools into channels.

• Incident response

  Playbooks give repeatable checklists for outages and security events, with automated triggers on Enterprise.

• Private AI agents

  Agents can use a model you host yourself, so prompts and data need not leave the network.

How much does Mattermost cost?

Mattermost is free to self-host: Team Edition is the open source build for teams under 250 users, Entry is a free capped edition, and paid plans are priced through sales.

Professional (up to 250 users, SSO, next-business-day support), Enterprise and Enterprise Advanced are sold through sales with no public price. Mattermost suggests Entry for teams under 50 users. Full pricing on mattermost.com. We checked these prices on 8 Nov 2026.

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Is Mattermost open source?

Yes. Mattermost's code is public under the AGPL 3.0 licence, so you can run it on your own server.

Host it on a serverHostinger, Railway, Elestio and PikaPods set it up on a server for you with a one-click install.

Hosting with

What are the best Mattermost alternatives?

Mattermost is an open source alternative to Ando, Slack and Zoho Cliq. Buzz, Rocket.Chat and Campfire do the same job and are open source too.

AndoPaid

Team messaging app where AI agents join channels and work beside people, built to replace Slack.

SlackFree

Team messaging with AI summaries, search and huddle notes.

Zoho CliqFree

Team chat, calls and integrations from Zoho.

BuzzOpen Source

Block's open-source team chat where people and agents share channels.

Rocket.ChatOpen Source

Team chat with channels, threads, calls and video that organisations run on their own servers.

CampfireOpen Source

Group chat for companies that you install on your own server, with rooms, DMs and @mentions.

Questions about Mattermost