Mattermost review
A flexible team chat platform for technical teams that need self-hosting and automation.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Mattermost is an open-source collaboration platform for technical, operational, defense, and critical-infrastructure teams. It brings public and private channels, direct and group messaging, file sharing, threaded discussions, search, audio calls, screen sharing, workflow automation, project management, integrations, and AI-assisted collaboration into one product. Deployment options include on-premises, private clouds, and air-gapped environments, with web, Windows, macOS, Linux, iOS, Android, API, and self-hosted access. It is a strong fit for teams that prioritize control over their collaboration environment.
The published plans show a free Entry edition for small teams and subscription evaluation. It includes messaging, workflow automation, project management, calls, and AI agents, with monthly limits of 10,000 messages, 1,000 board cards, and 250 AI-assisted agent queries. Professional adds public and private channels, file sharing, threaded discussions, core search, guest accounts, and the integrations platform. Enterprise adds enterprise AI and agent capabilities, video integrations, Microsoft Teams messaging integration, shared channels and federation, plus advanced security and access controls. Professional and Enterprise are contact-sales plans, so teams should expect a sales-led purchasing process for paid tiers.
Mattermost’s ecosystem is particularly relevant to technical operations. Integrations include GitLab, ServiceNow, GitHub, Jira, Jenkins, PagerDuty, Prometheus, Grafana, Zoom, Zapier, and Microsoft Teams, while slash commands, bots, plugins, APIs, and webhooks support workflow customization. Boards extend the product beyond chat into project and task management, and AI features include bots, summarization, and contextual intelligence. Choose Mattermost when self-hosting, deployment flexibility, operational integrations, and open-source flexibility matter most. Teams that need a larger verified message history within the free edition, or prefer transparent paid pricing without sales contact, should consider alternatives.
Mattermost pros and cons
- Where it wins
- Self-hosting supports on-premises, private-cloud, and air-gapped deployments
- Combines messaging, calls, boards, automation, APIs, and AI agents
- Integrates with GitLab, GitHub, Jira, Jenkins, and Microsoft Teams
- Where it doesn't
- Entry limits message history to 10,000 messages
- Paid Professional and Enterprise plans require sales contact
- Advanced capabilities are concentrated in higher-tier plans
Mattermost fact sheet, pricing and score →
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