Can I use the output commercially or share files etc?
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Yes — you are using a collaboration platform; there's no “output” in the sense of generated content that has separate licensing. If you self-host, you control your data and usage. Ensure third-party plugins or integrations you add comply with your own licensing.
How many users or messages can I support?
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The free/open version has fewer enterprise features. For the Professional tier, the search capability is specified as “core search up to 3 million posts/files” in the pricing page. (Mattermost.com) For very large scale you may need the Enterprise edition.
Can I edit or customise what it generates?
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Yes — Mattermost supports extensive customisation: you can add branding, themes, plugins/apps, integrate APIs/webhooks, build bots/agents. But some advanced capabilities are in paid tiers.
Does it integrate with my tools (e.g., Jira, GitLab, ServiceNow)?
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Yes — it has pre-built integrations and plugin support for many DevOps/IT tools (GitHub, GitLab, Jira, ServiceNow, etc). (Mattermost.com)
Does the company train using my content?
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If you self-host, your data stays under your control. In cloud hosted setups you should review their privacy policy. The company emphasises that deployments can be in sovereign/air-gapped environments. (Mattermost Documentation)
What kind of support do I get on paid plans?
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On the Professional tier there is business-hours support (as per pricing page). (G2) On the Enterprise plan there is 24×7 support and faster response SLAs.
What extra do I get on the top plan versus the starter?
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Enterprise gives you advanced compliance, performance, governance features, custom admin roles, full SSO, air-gap/sovereign deployment options, high-availability clusters, 24×7 support. Starter gives basic messaging features and may lack advanced governance, SSO and scale features.
