# eclipse-mosquitto/mosquitto

Eclipse Mosquitto - An open source MQTT broker

Repository: https://github.com/eclipse-mosquitto/mosquitto
Canonical: https://ross.abutalabs.com/products/mosquitto
Homepage: https://mosquitto.org
Language: C
License: NOASSERTION
License Family: other
Topics: mqtt, broker, mosquitto, eclipse-iot
Last push: 2026-08-26T09:18:50+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3828, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 11158, forks 2629 (observed 2026-08-28T04:10:46.261474+00:00)

## What it is
Eclipse Mosquitto is an open source MQTT message broker implementing MQTT versions 5.0, 3.1.1, and 3.1, written in C and suitable for devices from low-power single-board computers to full servers. It also ships a C/C++ client library (libmosquitto) and command-line publish/subscribe and administration utilities such as mosquitto_pub, mosquitto_sub, and mosquitto_passwd.

## Use cases
- run an mqtt broker for iot sensors
- publish and subscribe to mqtt topics from the command line
- self-host a lightweight message broker for home automation
- bridge messages between low-power embedded devices and servers
- add mqtt client functionality to a C or C++ application
- secure mqtt messaging with tls and authentication
- test mqtt integrations against a local broker

## When to choose
- you need a lightweight, resource-efficient mqtt broker for iot or embedded devices
- you want a mature, well-documented broker with tls, websockets, and access-control plugin support
- you need a C/C++ mqtt client library or simple pub/sub cli tools
- you are self-hosting messaging for sensors, mobile devices, or microcontrollers

## When to avoid
- you need a horizontally scalable clustered broker for millions of concurrent clients
- you require kafka-style persistent log-based streaming rather than lightweight pub/sub
- you want a managed cloud messaging service without operating your own broker
- you need broker features like built-in rule engines or graphical management consoles

## Facets
- artifact type: service
- maturity: stable
- function: message-queue, http-server, auth, middleware, cli, sdk
- domain: iot, networking, developer-tools, self-hosted
- platform: windows, cross-platform, self-hosted, embedded, iot, c
- tags: mqtt-broker, pub-sub, mqtt5, iot-messaging, libmosquitto, mosquitto-pub, mosquitto-sub, tls, websockets, lightweight, messaging, linux, macos, docker

## Member repositories
- eclipse-mosquitto/mosquitto (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:46.261474+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 2026-08-29T17:16:44.381707+00:00, confidence not recorded.
  - readme: https://github.com/eclipse-mosquitto/mosquitto (fetched 2026-08-28T04:10:46.261474+00:00, sha cc8904e91ec6)
  - homepage: https://mosquitto.org (fetched 2026-08-29T08:15:15.184458+00:00, sha ca0c1343faa9)
  - site_page: https://mosquitto.org/documentation (fetched 2026-08-29T08:15:15.193884+00:00, sha 8e3729930f8a)
- Data as of 2026-08-30T08:39:29.467469+00:00.