Mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle.. observed · 2026-08-28
Health v2 · maintenance only
95/100
- Activity 99
- Release rhythm 87
- Longevity 100
Flags: no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 0.0
- age_days: 4097
- days_rel: 7
- days_push: 7
- n_releases_24m: 171
Adoption not part of the score
38910 stars · 8942 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Mattermost is an open-core, self-hosted collaboration platform offering team chat channels, voice calling, screen sharing, workflow automation (Playbooks), and AI integration for mission-critical work. The server is written in Go and React, ships as a single Linux binary backed by PostgreSQL, and is extensible via REST APIs, webhooks, slash commands, and a plugin system, with native mobile and desktop clients.
Use cases
- self-hosted Slack alternative for my team
- secure team chat for air-gapped or on-premises networks
- incident response and on-call collaboration tool
- ChatOps platform integrated with GitLab, Jira, and ServiceNow
- private messaging platform for government or defense teams
- workflow automation for IT service desk and DevSecOps
- team communication with voice calls and screen sharing under my own infrastructure
When to choose
- You need full data sovereignty with on-premises, private-cloud, or air-gapped deployment
- Your organization has strict security and compliance requirements for communications (defense, government, critical infrastructure)
- You want ChatOps and DevSecOps workflows embedded directly in team messaging
- You need a highly extensible chat platform with APIs, webhooks, slash commands, and plugins
When to avoid
- You want a zero-maintenance hosted SaaS chat without operating your own servers
- You need only a lightweight embeddable chat widget rather than a full collaboration platform
- A small team is fine with free hosted tools like Slack or Discord and does not need self-hosting
- You require a fully permissive open-source license, since Mattermost is open core with a non-standard license (NOASSERTION)
Facets
application · maturity stable
chat-interface workflow-automation self-hosted webhook plugin-system websocket http-server messaging-platforms self-hosted developer-tools security windows browser self-hosted go cross-platform team-chat slack-alternative collaboration open-core chatops devsecops incident-response playbooks voice-calls screen-sharing monorepo react-native devops automation real-time linux macos android ios web-server docker kubernetes
9 sources
- readme: https://github.com/mattermost/mattermost · fetched 2026-08-28 · b44438092f4a
- homepage: https://mattermost.com · fetched 2026-08-29 · cdc779ec6810
- site_page: https://docs.mattermost.com/ · fetched 2026-08-29 · 0102ec07ea96
- site_page: https://docs.mattermost.com/administration/changelog.html · fetched 2026-08-29 · 259fc07dcea4
- site_page: https://mattermost.com/install · fetched 2026-08-29 · 13ce8c2d36d2
- site_page: https://developers.mattermost.com/integrate/getting-started · fetched 2026-08-29 · 4eff23589e20
- site_page: https://mattermost.com/about-us · fetched 2026-08-29 · 6affc023ea51
- site_page: https://mattermost.com/integrations-overview · fetched 2026-08-29 · c6ff630474ef
- site_page: https://mattermost.com/pricing · fetched 2026-08-29 · f05a0198a24d
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| mattermost/mattermost | main | 95 |
| mattermost/mattermost-mobile | frontend | 99 |
For agents
markdown · JSON · MCP: product_card(name="mattermost/mattermost")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem