HiveMQ provides the most trusted IoT data streaming and Industrial AI platform, built on MQTT, to power a reliable, scalable, and AI-ready data backbone.
What HiveMQ is known for:
1. MQTT-native: Built around the MQTT standard, purpose-designed for event-driven, real-time communication
2. Enterprise-grade reliability: Handles millions of concurrent connections with high availability and fault tolerance
3. Industrial-ready: Widely used in IIoT, manufacturing, automotive, energy, smart infrastructure, and data centers
4. Scalable & secure: Supports global deployments with strong security, governance, and observability
5. UNS & IT/OT convergence enabler: Commonly used as the backbone for Unified Namespace architectures and seamlessly connects OT devices with IT systems for full visibility and interoperability.
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Passwork is a corporate password manager available as a self-hosted solution or a secure cloud service. Built and headquartered in Barcelona, Spain, it was designed from the ground up to satisfy GDPR, NIS2, ENS, and related European compliance requirements.
The self-hosted version keeps credentials on your own servers, while the cloud option is hosted in secure German data centers. Zero-knowledge architecture and client-side AES-256 encryption ensure your data remains fully under your control and inaccessible to third parties.
ISO/IEC 27001 certified. Enterprises across industries use Passwork to handle secure password sharing, privileged access management, and centralized credential governance — with full confidence that their secrets are protected.
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Eclipse Mosquitto
Eclipse Mosquitto is an open-source message broker licensed under EPL/EDL that is crafted to accommodate multiple versions of the MQTT protocol, including 5.0, 3.1.1, and 3.1. This broker is remarkably lightweight, making it suitable for a diverse array of devices, ranging from low-power single-board computers to high-capacity server systems.
The MQTT protocol itself provides an effective mechanism for managing messaging via a publish/subscribe model, which is especially advantageous for Internet of Things applications, allowing for seamless communication with low-energy sensors or mobile devices such as smartphones and embedded systems.
Beyond the broker, the Mosquitto project also features a C library that aids in the development of MQTT clients, as well as popular command line tools, mosquitto_pub and mosquitto_sub, which significantly improve user engagement with the MQTT protocol. Furthermore, Mosquitto stands out as a flexible resource for developers seeking to establish messaging frameworks across a wide range of applications, ensuring comprehensive support for various communication needs.
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Zunoy FreeMQTT
Zunoy FreeMQTT is a free public MQTT broker designed to support educational initiatives, experimentation, and rapid prototyping. This service offers developers, students, and IoT teams a way to connect their devices and applications to a readily accessible MQTT broker without requiring registration or complicated setup processes. Users can publish and subscribe to various topics, test device messaging functions, and investigate MQTT workflows using standard TCP, TLS, WebSocket, and secure WebSocket connections.
The platform supports MQTT versions 3.1, 3.1.1, and 5, making it an excellent choice for assessing IoT devices, developing browser-based dashboards, automating workflows, and integrating various applications. It also provides clear connection details and sample code tailored for popular programming languages such as Node.js, Python, Arduino/C++, Go, and browser applications, ensuring ease of use for developers.
FreeMQTT is specifically designed for non-production environments, enabling teams to verify MQTT communication effortlessly, prototype real-time systems, and deepen their understanding of MQTT messaging mechanics. Moreover, it is an invaluable tool for anyone seeking to improve their grasp of IoT communication protocols and practical applications in the field. Users can explore innovative solutions and experiment with new projects, making FreeMQTT a versatile platform for learning and development.
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