List of the Top 5 On-Prem Event Brokers in 2025

EMQX is an exceptionally scalable and dependable MQTT messaging platform crafted by EMQ, capable of handling a staggering 100 million simultaneous IoT device connections per cluster, all while ensuring incredibly high throughput and latencies measured in sub-milliseconds. With over 20,000 users globally across more than 50 nations, EMQX successfully connects in excess of 100 million IoT devices and has earned the trust of over 300 clients in essential IoT applications, featuring prominent names such as HPE, VMware, Verifone, SAIC Volkswagen, and Ericsson. Our versatile edge-to-cloud IoT data solutions cater to the diverse needs of various sectors undergoing digital transformation, including connected vehicles, industrial IoT, oil and gas, telecommunications, finance, smart energy, and smart cities. EMQX Enterprise stands out as the leading scalable MQTT messaging platform, offering 100 million concurrent MQTT connections, a message throughput of 1 million messages per second with under 1 millisecond latency, and business-critical reliability with an SLA of up to 99.99%. Additionally, it enables seamless integration of IoT data with more than 40 cloud services and enterprise systems. Meanwhile, EMQX Cloud serves as a fully managed MQTT service for IoT, allowing users to scale according to their needs and pay based on usage, alongside offering extensive IoT data integration options with over 40 choices. With operational capabilities across 19 regions on AWS, GCP, and Microsoft Azure, EMQX Cloud ensures 100% MQTT compliance for its users. The combination of these features positions EMQX as an unrivaled solution in the realm of IoT messaging platforms.

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.

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.

Lightstreamer serves as a highly specialized event broker tailored for the internet, ensuring a seamless and rapid exchange of data across various online platforms. Unlike traditional brokers, it skillfully addresses the complexities of proxies, firewalls, network disruptions, congestion, and the unpredictable nature of web connectivity. Its cutting-edge streaming technology guarantees the continuous and prompt delivery of real-time data, consistently identifying efficient and reliable routes for your information. Lightstreamer's innovative capabilities are not only well-established but also continuously evolve, affirming its status as a leader in technological advancement. With a rich history and vast practical expertise, it promises safe and effective data transmission. Users can rely on Lightstreamer for unparalleled reliability in any scenario, solidifying its role as an essential asset for real-time communication requirements. In the dynamic realm of digital transformation, Lightstreamer emerges as a dependable ally for facilitating seamless data delivery while adapting to emerging trends. This adaptability positions Lightstreamer as a forward-thinking solution in a fast-paced environment.

IBM® MQ on Cloud stands as the ultimate solution for enterprise messaging, guaranteeing secure and reliable communication both in-house and across diverse cloud settings. By adopting IBM MQ on Cloud as a managed service, organizations can take advantage of IBM's oversight in handling upgrades, patches, and various operational responsibilities, freeing up teams to focus on seamlessly integrating it with their applications. For example, if a business runs a cloud-based mobile application to facilitate e-commerce transactions, IBM MQ on Cloud can facilitate the connection between the on-premises inventory management system and the customer-facing app, providing users with real-time updates on product availability. Although the main IT infrastructure is based in San Francisco, package processing occurs in a facility in London, and IBM MQ on Cloud guarantees that messages are reliably exchanged between these two sites. It allows the London office to securely encrypt and transmit data related to each package that needs to be tracked while enabling the San Francisco office to receive and handle that information with heightened security protocols. Both locations can trust that the integrity of the data exchanged is preserved, ensuring it remains accurate and accessible. This robust communication framework is vital for sustaining operational efficiency and fostering trust across international business operations, which ultimately enhances the overall performance of the organization.