# Mattermost

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Repository: https://github.com/mattermost/mattermost
Canonical: https://ross.abutalabs.com/products/mattermost
Homepage: https://mattermost.com
Language: TypeScript
License: NOASSERTION
License Family: other
Topics: collaboration, mattermost, golang, react-native, hacktoberfest, monorepo, react
Last push: 2026-08-26T23:31:03+00:00
Link (homepage): https://mattermost.com
Link (site_page): https://mattermost.com/integrations-overview
Link (site_page): https://mattermost.com/pricing
Link (site_page): https://docs.mattermost.com/
Link (site_page): https://docs.mattermost.com/administration/changelog.html

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 4097, "days_push": 7, "days_rel": 7, "gap_med": 0.0, "n_releases_24m": 171}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 38910, forks 8942 (observed 2026-08-28T04:12:07.724980+00:00)

## What it is
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
- artifact type: application
- maturity: stable
- function: chat-interface, workflow-automation, self-hosted, webhook, plugin-system, websocket, http-server
- domain: messaging-platforms, self-hosted, developer-tools, security
- platform: windows, browser, self-hosted, go, cross-platform
- tags: 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

## Member repositories
- mattermost/mattermost (main) score 95
- mattermost/mattermost-mobile (frontend) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:07.724980+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:24:48.602178+00:00, confidence not recorded.
  - readme: https://github.com/mattermost/mattermost (fetched 2026-08-28T04:12:07.724980+00:00, sha b44438092f4a)
  - homepage: https://mattermost.com (fetched 2026-08-29T07:47:41.403349+00:00, sha cdc779ec6810)
  - site_page: https://docs.mattermost.com/ (fetched 2026-08-29T07:47:41.415501+00:00, sha 0102ec07ea96)
  - site_page: https://docs.mattermost.com/administration/changelog.html (fetched 2026-08-29T07:47:41.417545+00:00, sha 259fc07dcea4)
  - site_page: https://mattermost.com/install (fetched 2026-08-29T07:47:41.419199+00:00, sha 13ce8c2d36d2)
  - site_page: https://developers.mattermost.com/integrate/getting-started (fetched 2026-08-29T07:47:41.420990+00:00, sha 4eff23589e20)
  - site_page: https://mattermost.com/about-us (fetched 2026-08-29T07:47:41.422883+00:00, sha 6affc023ea51)
  - site_page: https://mattermost.com/integrations-overview (fetched 2026-08-29T07:47:41.410952+00:00, sha c6ff630474ef)
  - site_page: https://mattermost.com/pricing (fetched 2026-08-29T07:47:41.412898+00:00, sha f05a0198a24d)
- Data as of 2026-08-30T08:39:29.467469+00:00.