Mattermost
Self-hostable team messaging with channels, playbooks, calls and integrations for secure teams.
Our verdict
What it does well
- Free self-hosted editions, including an MIT-licensed Team Edition
- Runs self-hosted, in a private cloud or fully air-gapped
- Desktop apps for Windows, macOS, Linux and mobile apps for iOS, Android
Where it falls short
- Paid plan prices are not published; Contact Sales or request a quote
- Free Entry edition caps visible message history at 10,000 messages
- You run and maintain the server yourself
Mattermost is a collaboration platform with channels, threads, playbooks for workflows, calls and screen sharing, boards, and a REST API with webhooks and slash commands. Its site lists web, desktop and mobile apps. The server runs on any 64-bit Linux system and can be self-hosted, in a private cloud or air-gapped.
Mattermost's licensing is mixed. Its licence file says compiled versions from Mattermost, Inc. are under MIT, source used to build your own compiled versions is under AGPL v3.0 (or a commercial licence), and some admin tools and config files are under Apache 2.0. Its docs describe a free, open source Team Edition (MIT, under 250 activated users) and a free Entry edition that runs on the Enterprise binary under a commercial licence.
Paid plans are Professional, Enterprise and Enterprise Advanced. The pricing page shows no prices, only Contact Sales, Get Pricing and Request Quote. It says paid licences are sold as prepaid annual subscriptions based on seat count, and each server needs its own licence.
Mattermost compared
Alternatives to Mattermost
Workplace messaging with channels, huddles, workflows, search and AI features for teams.
- Freemium
Last updated 16 October 2026. Facts checked against the official site on 16 October 2026. How we make money