Audience
IoT developers searching for a public MQTT broker solution for their IoT projects
About MQTTHQ
A reliable MQTT broker is an essential part of every IoT project but setting one up, debugging, monitoring and maintaining it is complex and time-consuming. MQTTHQ is a load-balanced, multi-node MQTT broker cluster, which is designed to provide a stable and highly-reliable broker for developing IoT products and applications. MQTTHQ supports both TCP and WebSocket connections. Important: MQTTHQ is a public broker, which means that any information you send via this broker is visible to other users; please do not send private or personal information via this public broker! As part of our commitment to maintaining the MQTTHQ public broker as a free resource for IoT developers, we occasionally need to make improvements, add new features, etc.
Other Popular Alternatives & Related Software
EMQX
EMQX is the world's most scalable and reliable MQTT messaging platform 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.
Our edge-to-cloud IoT connectivity solutions are flexible to meet the demands of various industries towards digital transformation, including connected vehicles, Industrial IoT, oil & gas, carrier, finance, smart energy, and smart cities.
Learn more about EMQX
ConnectMQ
ConnectMQ is a managed MQTT broker and web platform for teams connecting sensors, machines, vehicles and applications. It provides broker access without requiring customers to install or maintain broker servers. Devices and software can connect using MQTT 3.1.1 or MQTT 5 over TCP, TLS or WebSockets, with username/password authentication and per-topic access controls. The workspace includes a dashboard and topic monitor for viewing broker status, messages and live telemetry; an ISA-95 topic hierarchy for organizing industrial data; and rules, alert logs and browser notifications for conditions on JSON payload fields. ConnectMQ is intended for industrial IoT, connected products, fleet and energy telemetry, smart-home projects, and prototyping.
Learn more about ConnectMQ
Zunoy FreeMQTT
Zunoy FreeMQTT is a free public MQTT broker built for learning, testing, and rapid prototyping. It allows developers, students, and IoT teams to connect devices and applications to an always-available MQTT broker without registration or setup. Users can publish and subscribe to topics, test device messaging, and experiment with MQTT workflows using standard TCP, TLS, WebSocket, and secure WebSocket connections.
The platform supports MQTT v3.1, v3.1.1, and v5, making it useful for testing IoT devices, browser-based dashboards, automation workflows, and application integrations. It also provides ready-to-use connection details and example code for popular environments such as Node.js, Python, Arduino/C++, Go, and browser applications.
FreeMQTT is designed for non-production use cases where teams need a simple way to validate MQTT communication, prototype real-time systems, and learn how MQTT-based messaging works.
Learn more about Zunoy FreeMQTT
Open Automation Software
Liberate your Industry 4.0 data with Open Automation Software IIoT platform for Windows and Linux. OAS is truly an unlimited IoT Gateway for Windows, Linux, Raspberry Pi 4, Windows IoT Core, and Docker deployments.
Create HMI visualization for web, WPF, and WinForm C# and VB .NET applications.
Log data and alarms to SQL Server, Oracle, MS Access, MySQL, Azure SQL, PostgreSQL, Cassandra, MongoDB, MariaDB, SQLite, InfluxDB, and CSV files.
MQTT Broker and Client interface along with cloud connectivity to Azure IoT and AWS IoT Gateway.
Read and write data from remote Excel Workbooks.
Alarm notification to email, SMS text, and voice messaging.
.NET and REST API programmatic access.
Allen Bradley ControlLogix, CompactLogix, GuardLogix, Micro800, MicroLogix, SLC 500, and PLC-5.
Siemens S7-200, S7-300, S7-400, S7-1200, and S7-1500.
Modbus TCP, Modbus RTU, and Modbus ASCII for Master and Slave communications.
OPTO-22, MTConnect, and OPC UA, OPC DA.
Learn more about Open Automation Software
Pricing
Starting Price:
Free
Free Version:
Free Version available.
Integrations
Company Information
MQTTHQ
mqtthq.com
Videos and Screen Captures
Other Useful Business Software
Build Agents and Models on One Platform
Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
Product Details
Platforms Supported
Cloud
Training
Documentation
Support
Online
MQTTHQ Frequently Asked Questions
Q: What kinds of users and organization types does MQTTHQ work with?
MQTTHQ works with these users and organization types: Mid Size Business, Small Business, Enterprise, Freelance, Nonprofit, Government, and Startup.
Q: What languages does MQTTHQ support in their product?
MQTTHQ supports these languages: English.
Q: What kind of support options does MQTTHQ offer?
MQTTHQ offers support via online.
Q: What other applications or services does MQTTHQ integrate with?
MQTTHQ integrates with: Hoppscotch and LLumin.
Q: What type of training does MQTTHQ provide?
MQTTHQ provides training in the form of documentation.
Q: How much does MQTTHQ cost?
Pricing for MQTTHQ starts at Free.
