RabbitMQ

With tens of thousands of users, RabbitMQ is one of the most popular open source message brokers. From T-Mobile to Runtastic, RabbitMQ is used worldwide at small startups and large enterprises.

RabbitMQ is lightweight and easy to deploy on premises and in the cloud. It supports multiple messaging protocols and streaming. RabbitMQ can be deployed in distributed and federated configurations to meet high-scale, high-availability requirements.

RabbitMQ runs on many operating systems and cloud environments, and provides a wide range of developer tools for most popular languages.

Primarily supports AMQP, but also supports other protocols like MQTT, STOMP, and HTTP, enabling versatile messaging across different platforms.

RabbitMQ can be deployed in a clustered configuration to enhance performance, reliability, and fault tolerance. Clustering allows for horizontal scaling by adding more nodes to the cluster.

Offers powerful message routing capabilities through exchanges and queues. Supports direct, topic, fanout, and headers exchanges to route messages based on different criteria.

Ensures reliable message delivery through features like message persistence, acknowledgments, and publisher confirms. This guarantees that messages are not lost even in the event of a broker failure.

Provides high availability through mirrored queues, where queues are replicated across multiple nodes in a cluster. This ensures that messages are available even if one node fails.

Comes with a user-friendly web-based management console that allows users to monitor and manage queues, exchanges, bindings, and connections in real time. Integrates with external monitoring tools like Prometheus and Grafana for enhanced observability.

Supports robust security features, including TLS/SSL for encrypted connections, and various authentication mechanisms such as username/password, LDAP, and OAuth2. Provides fine-grained access control with virtual hosts, ensuring secure and isolated messaging environments.

RabbitMQ has a rich plugin system that allows users to extend its functionality. Plugins are available for monitoring, message tracing, and protocol support, among others.

RabbitMQ is commonly used in microservices architectures to decouple services and enable asynchronous communication between them.

Suitable for real-time data streaming and processing, enabling applications to react to data as it is received.

Used for background job processing, where tasks are queued for execution by workers at a later time, helping to offload work from the main application thread.

Facilitates the development of event-driven applications by allowing events to be published to and consumed from queues, enabling responsive and scalable systems.

Ideal for IoT applications where devices need to communicate with each other or with cloud services, supporting protocols like MQTT for lightweight messaging.

RabbitMQ docs