Open Source Windows MQTT Brokers
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MQTT Brokers for Windows
View 22 business solutionsBrowse free open source MQTT Brokers and projects for Windows below. Use the toggles on the left to filter open source MQTT Brokers by OS, license, language, programming language, and project status.
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MQTT X
Powerful cross-platform MQTT 5.0 desktop, CLI, and WebSocket client
MQTT X is a cross-platform MQTT 5.0 client tool open sourced by EMQ, which can run on macOS, Linux and Windows, and supports formatting MQTT payload. MQTT X simplifies test operation with the help of a familiar, chat-like interface. It’s easy and quick to create multiple, simultaneous online MQTT client connections, and can test the connection, publishing, and subscription functions of MQTT/TCP, MQTT/TLS, MQTT/WebSocket as well as other MQTT protocol features. MQTT stands for MQ Telemetry Transport. It is a publish/subscribe, extremely simple and lightweight messaging protocol, designed for constrained devices and low-bandwidth, high-latency or unreliable networks. To run MQTT Broker locally, EMQX is recommended: An Open-Source, Cloud-Native, Distributed MQTT Broker for IoT. After the MQTT is connected successfully, you can perform MQTT publish and subscription tests. -
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MQTTnet
High performance .NET library for MQTT based communication
MQTTnet is a high-performance .NET library for MQTT-based communication. It provides an MQTT client and an MQTT server (broker) and supports the MQTT protocol up to version 5. TLS support for client and server (but not UWP servers). Extensible communication channels (e.g. In-Memory, TCP, TCP+TLS, WS). Lightweight (only the low-level implementation of MQTT, no overhead). Performance optimized (processing ~150.000 messages/second). Uniform API across all supported versions of the MQTT protocol. Tested on the local machine (Intel i7 8700K) with MQTTnet client and server running in the same process using the TCP channel. The app for verification is part of this repository and stored in /Tests/MQTTnet.TestApp.NetCore. List of connected clients available. Supports connected clients with different protocol versions at the same time. Able to publish its own messages (no loopback client required). Able to receive every message (no loopback client required). -
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emqx
The Most Scalable MQTT Broker for IoT
EMQX is the world's most scalable and reliable MQTT Broker designed by EMQ. It supports 100M concurrent IoT device connections per cluster while maintaining extremely high throughput and sub-millisecond latency. EMQX boasts more than 20,000 global users from over 50 countries, connecting more than 100M IoT devices worldwide, and is trusted by over 300 customers in mission-critical IoT scenarios, including well-known brands like HPE, VMware, Verifone, SAIC Volkswagen and Ericsson. Flex to meet the demands of various industries towards digital transformation, including Connected Vehicles, Industrial IoT, Oil & Gas, Carrier, Finance, Smart Energy, and Smart Cities. -
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mySQM+ DIY SQM WEATHER STATION
ESP32 mySQM+ Sky-Meter/Weather Station with loads of features
mySQM+ Sky Quality Meter/Weather Station (c) R Brown, 2020-2025, All rights reserved. Permission is granted for personal and Academic use only. Code or portions of code may not be copied or used without appropriate credit given to author(s). EXPANSION BOARDS - You can expand this project using the two types of project expansion boards at https://sourceforge.net/projects/myesp-boards/ -
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MAX! home automation
MAX! cube GUI
MAX home automation is a GTK+ application to manage ELV/eQ-3 MAX! cubes. A cube is a gateway to a network of radiator thermostats, shutter contacts etc. Radiator and wall-mounted thermostat schedule can be edited uploaded, stored into a file and restored from there. Wall-mounted thermostat temperature graphs are indicated on a separate page sorted by the installation room. HTTP server is provided for integration with HTTP-enabled controls. E.g. thermostats can be queried and controlled remotely via HTTP GET-queries. -
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Aedes
Barebone MQTT broker that can run on any stream server
A high-performance MQTT broker for IoT applications, designed to be lightweight and scalable. -
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JustMQTT
MQTT Client app built with Python
MQTT Client HMI built with Python to communicate via a Broker. Username, broker ip and topic are stored in a local text file. -
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MqttMon
MqttMon - Monitor all messages published on your mqtt broker
MqttMon - allows you to Monitor all messages published on your mqtt broker -
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MQTT - Lightweight Client
MQTT - Lightweight Client
A simple and powerfull MQTT Lightweight Windows Client - beta version! Sources: https://github.com/edwardmartinsjr/MQTTLightweightClient -
Go From AI Idea to AI App FastAccess Gemini 3 and 200+ models. Build chatbots, agents, or custom models with built-in monitoring and scaling.
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AWS IoT Device SDK for Embedded C
SDK for connecting to AWS IoT from a device using embedded C
The AWS IoT Device SDK for Embedded C (C-SDK) is a collection of C source files under the MIT open source license that can be used in embedded applications to securely connect IoT devices to AWS IoT Core. It contains MQTT client, HTTP client, JSON Parser, AWS IoT Device Shadow, AWS IoT Jobs, and AWS IoT Device Defender libraries. This SDK is distributed in source form and can be built into customer firmware along with application code, other libraries, and an operating system (OS) of your choice. These libraries are only dependent on standard C libraries, so they can be ported to various OS's - from embedded Real-Time Operating Systems (RTOS) to Linux/Mac/Windows. You can find sample usage of C-SDK libraries on POSIX systems using OpenSSL (e.g. Linux demos in this repository), and on FreeRTOS using mbedTLS (e.g. FreeRTOS demos in the FreeRTOS repository). The coreHTTP library provides the ability to establish an HTTP connection with a server over a customer-implemented transport layer. -
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ESP8266_Flespi_yum
ESP8266 (ESP-01) + Serial Commands + Flespi Broker
ESP-01, the simplest USD 1.50.- ESP8266 gets a firmware that allows the user to control it by serial port. Therefore it can be used along with any terminal, computer or microcontroller, which is equipped with a serial port (or USB port) -) Connect / disconnect to WiFi and Flespi MQTT broker -) Publish messages -) Subscribe to topics / Unsubscribe from topics -) Read the messages received Furthermore a GUI is on developing process to demonstrate the use. Paypal donations are welcome! reinharddaemon@gmail.com -
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MQTT Erlang client
IOT Client of MQTT server written in Erlang
MQTT client is designed for communication in Machine to Machine (M2M) and Internet of Things (IoT) contexts and implements MQTT protokol versions 3.1 and 3.1.1. The client is written in Erlang and tested with MQTT servers like Mosquitto and RabbitMQ. -
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MQTT Erlang server
MQTT server for IOT written in Erlang
MQTT server is designed for communication in Machine to Machine (M2M) and Internet of Things (IoT) contexts and implements MQTT protocol versions 3.1 and 3.1.1. The server is written in Erlang as OTP application. -
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TRAM
TRade Account Monitor for mt4/5 via mqtt
Monitor preferred data of many trading accounts to your owned MQTT server. -
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jfmqtt
MQTT Server (Broker)
MQTT Broker on port 1883, 8883 (SSL). MQTT Viewer to view messages. Supports: - user/pass auth - forwarding messages to a secondary MQTT Server To generate SSL keys from command line run : jfmqttconfig createKeys -
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mqottrace
An mqtt client to subscribe to owntracks events
For owntracks, see https://owntracks.org/ mqottrace collects location data from the mqtt server and writes it into an sqlite3 database. You can convert the data into gpx tracks with mqott2gpx. -
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xenqtt
Java MQTT client API and applications
A library that includes a Java MQTT client API that can be used in both synchronous and asynchronous applications. The library also includes various MQTT applications including a proxy that allows a server cluster to be load balanced as a single MQTT client; an HTTP <-> MQTT gateway; a mock MQTT broker; etc
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