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Visit mattermost.com
Category
Developer Tools
Rank
No. 1263Tools index

Previous survey · No. 1239 ·

Pricing
Freemium
Type
TOOL
Date

About

Self-hostable team chat. Open-source, self-hostable Slack alternative. Free to self-host; the paid Professional tier adds SSO, compliance, and support.

What it does

According to its homepage, Mattermost positions itself as a mission-critical collaboration platform for government and defense customers, combining secure messaging, workflow automation, and AI agents that can run on-premises or in air-gapped networks.

Stated on the product site

Deployment options
The page lists sovereign cloud, on-prem, and air-gapped deployment models
Integrations
Offers an open API, webhooks, and a plugin architecture for extending the platform
Feature set
Includes Kanban-style project and task coordination features
Interoperability
Can be embedded inside Microsoft Teams, Outlook, and M365

Not stated on the site

  • Pricing or licensing tiers are not disclosed anywhere on this page
  • The specific compliance certifications behind the general 'compliance auditing' claims are not named
  • Supported client platforms and system requirements are not specified on this page

Written from the product site at mattermost.com.

Tags

MattermostMessaging & Community

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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.