List of the Top 11 Free Message Queue Software in 2025

RabbitMQ serves as a nimble messaging solution that can be easily implemented in both on-premises setups and cloud-based environments. Its support for multiple messaging protocols renders it a flexible choice for a variety of applications. Additionally, RabbitMQ can be set up in distributed and federated configurations to meet the needs for high scalability and robust availability. With a large community of users, it is recognized as one of the top open-source message brokers currently available. Companies ranging from T-Mobile to Runtastic utilize RabbitMQ, demonstrating its suitability for both burgeoning startups and established enterprises alike. Moreover, it is designed to work seamlessly across a multitude of operating systems and cloud platforms, providing a rich array of development tools tailored for popular programming languages. Users can take advantage of deployment options including Kubernetes, BOSH, Chef, Docker, and Puppet, which enables smooth integration into their current environments. Developers also have the ability to craft cross-language messaging solutions using a selection of programming languages such as Java, .NET, PHP, Python, JavaScript, Ruby, and Go, thereby broadening its applicability across diverse projects. Ultimately, RabbitMQ’s versatility and compatibility make it an essential tool for modern software development.

Ably stands out as the leading platform for realtime experiences. With more WebSocket connections than any competing pub/sub service, we facilitate connections for over a billion devices each month. Companies rely on us for their essential applications, including chat, notifications, and broadcasts, ensuring that these services run reliably, securely, and at an impressive scale. Our commitment to excellence makes us the preferred choice for businesses seeking to enhance their realtime capabilities.

The Pro Edition of Eclipse Mosquitto serves as an advanced version of the leading MQTT broker, ensuring swift, stable, and dependable data transmission among IoT devices. Unlike its widely-used open-source counterpart, Pro Mosquitto enhances the user experience through features such as professional administration and monitoring for both MQTT brokers and clients, MQTT High Availability, access to MQTT and REST APIs, and improved security and support, making it exceptionally suited for commercial applications. One of the key advantages is its performance, which allows for minimal resource consumption while effortlessly managing up to a million simultaneous connections. Written in C, Pro Mosquitto's lightweight architecture ensures superior efficiency compared to its rivals, and it is capable of functioning on low-spec embedded devices, such as single-core 600MHz ARM processors with just 128MB of RAM. This reliability is further reinforced by its widespread acceptance within the global developer community, boasting over 500 million Docker pulls and a service level agreement (SLA) of up to 99.99%, which underscores its commitment to business continuity. Additionally, our dedicated professional services team is available to assist with any challenges, guaranteeing the successful deployment and maintenance of your projects while also offering tailored support to meet specific needs. With such a comprehensive range of features and services, Pro Mosquitto stands out as a robust solution for organizations looking to optimize their IoT communications.

Solace specializes in Event-Driven Architecture (EDA) and boasts two decades of expertise in delivering highly dependable, robust, and scalable data transfer solutions that utilize the publish & subscribe (pub/sub) model. Their technology facilitates the instantaneous data exchange that underpins many daily conveniences, such as prompt loyalty rewards from credit cards, weather updates on mobile devices, real-time tracking of aircraft on the ground and in flight, as well as timely inventory notifications for popular retail stores and grocery chains. Additionally, the technology developed by Solace is instrumental for numerous leading stock exchanges and betting platforms worldwide. Beyond their reliable technology, exceptional customer service is a significant factor that attracts clients to Solace and fosters long-lasting relationships. The combination of innovative solutions and dedicated support ensures that customers not only choose Solace but also continue to rely on their services over time.

Introducing an MQTT Broker meticulously crafted to fulfill all your needs for implementing and expanding IoT applications. This platform boasts an efficient REST API, a rich dashboard equipped with customizable widgets, and a comprehensive data storage system, among others. Users are empowered to quickly gain insights into their IoT devices, tracking client connections and disconnections alongside vital data via multiple dashboard widgets. The system enhances user experience by offering alerts and color-coded indicators triggered by specific value thresholds. Additionally, it includes a powerful rules engine that transforms MQTT messages to streamline machine-to-machine communication automation, supporting both event-driven and timer-based rules, which allow users to identify data trends and automate relevant responses. For secure communications between devices, it employs a publish and subscribe messaging model reinforced by dual layers of security, featuring SSL/TLS encryption for connectivity and optional username/password authentication. Furthermore, robust web security measures are integrated for safe data access. To maintain high availability, the broker can function with multiple message brokers concurrently, ensuring efficient data collection and message distribution from devices. This architecture guarantees an impressive 99.99% success rate in data retrieval, providing reliability in the face of software challenges. Additionally, the system's adaptability facilitates effortless integration with a variety of IoT applications and services, making it an ideal solution for diverse deployment scenarios. Ultimately, this MQTT Broker stands out as a reliable and versatile choice for any IoT project.

HiveMQ stands out as the most trusted MQTT platform for enterprises, designed specifically to facilitate connections through MQTT, ensure dependable communication, and manage IoT data effectively. Its versatility allows for deployment in various environments, whether on-premise or in the cloud, granting developers the adaptability they require as their IoT projects expand. Known for its reliability even under challenging conditions, HiveMQ scales effortlessly and incorporates enterprise-level security features that cater to organizations at any phase of their digital transformation journey. Furthermore, this flexible platform enables smooth integration with top data streaming services, databases, and analytics tools, while also providing a customizable SDK to seamlessly integrate into any technological ecosystem. As IoT demands continue to evolve, HiveMQ remains a pivotal resource for businesses aiming to leverage cutting-edge technology.

StreamNative revolutionizes the streaming infrastructure landscape by merging Kafka, MQ, and multiple other protocols into a unified platform, providing exceptional flexibility and efficiency that aligns with current data processing needs. This comprehensive solution addresses the diverse requirements of streaming and messaging found within microservices architectures. By offering an integrated and intelligent strategy for both messaging and streaming, StreamNative empowers organizations with the capabilities to tackle the complexities and scalability challenges posed by today’s intricate data ecosystems. Additionally, the unique architecture of Apache Pulsar distinguishes between the message serving and storage components, resulting in a resilient cloud-native data-streaming platform. This design is both scalable and elastic, permitting rapid adaptations to changes in event traffic and shifting business demands, while also scaling to manage millions of topics, thereby ensuring that computation and storage functions remain decoupled for enhanced performance. Ultimately, this pioneering structure positions StreamNative at the forefront of meeting the diverse needs of modern data streaming, while also paving the way for future advancements in the field. Such adaptability and innovation are crucial for organizations aiming to thrive in an era where data management is more critical than ever.

ZeroMQ, also known as ØMQ, 0MQ, or zmq, may seem like a simple networking library at first glance, but it actually serves as a powerful concurrency framework. It offers sockets that handle atomic message transmission via different transport methods, including in-process, inter-process, TCP, and multicast. Users can create N-to-N socket connections using various patterns such as fan-out, publish-subscribe, task distribution, and request-reply. Its exceptional speed makes it an ideal choice for the foundation of clustered applications, while its asynchronous I/O architecture supports the creation of scalable multicore applications structured around asynchronous message-processing tasks. Additionally, ZeroMQ is compatible with a broad range of programming languages and works seamlessly across most operating systems, making it an adaptable tool for developers. This versatility not only fosters innovative solutions but also opens up opportunities for new approaches in different programming ecosystems. As a result, developers can leverage ZeroMQ to enhance the performance and scalability of their applications across various platforms.

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.

Create and execute event-driven API integration strategies that facilitate numerous connections between a variety of SaaS, ERP, CRM, and external applications. By establishing links between your enterprise systems and those of your collaborators, you can significantly boost operational efficiency. Capitalize on high-quality integration solutions available at competitive rates. Embrace the sophisticated features of contemporary technologies like containers and microservices, all accessible through an intuitive no-code, drag-and-drop interface. Tackle common business challenges such as Hire2Retire, Quote to Cash, Service Fulfillment, and Data lake development with ready-made solutions that streamline processes and reduce workload. Furthermore, design custom and complex business workflows that engage multiple enterprise applications, enabling you to achieve a strategic advantage and enhance overall organizational performance. This methodology not only simplifies the integration process but also equips teams with the tools necessary to innovate and adapt quickly to evolving market needs. Ultimately, this comprehensive approach fosters a more agile business environment, empowering organizations to stay ahead in a competitive landscape.

Middleware observability and management software designed for messaging, event processing, and streaming within hybrid cloud environments is known as MESH. - It offers a comprehensive situational awareness® that ensures full observability of Integration MESH. - The platform facilitates secure management of configuration, administration, and deployment processes while also automating these tasks. - Users can track and trace transactions, messages, and data flows effectively. - It enables the collection of data, performance monitoring, and benchmarking. meshIQ empowers users with detailed controls for managing configurations within the MESH, which minimizes downtime and accelerates recovery following outages. The software supports searching, browsing, tracking, and tracing messages to identify bottlenecks, enhance root cause analysis, and increase efficiency. By unlocking the integration black box, it provides visibility across the MESH infrastructure for thorough visualization, analysis, reporting, and predictive capabilities. Additionally, it equips users with the ability to initiate automated actions based on set criteria or intelligent AI/ML-driven decisions, further enhancing operational efficiency and responsiveness. This holistic approach not only improves system reliability but also fosters a proactive stance in managing integration challenges.