HomeArchitectureMessage Brokers vs. Enterprise Service Buses: Which should you choose?

Message Brokers vs. Enterprise Service Buses: Which should you choose?

There’s a lot of debate in the software development world about which is better – message brokers or enterprise service buses (ESBs).  Message brokers are typically used in scenarios where high performance and scalability are key. They’re also generally simpler to use and easier to implement than ESBs. However, ESBs offer more flexibility and features than message brokers. They’re better suited for complex enterprise applications that need to integrate with a variety of different systems.

So, which is right for your project? It really depends on your specific needs. If performance and scalability are the most important, then a message broker is probably a better option. Let’s find out more about the drawbacks of ESB and why microservices with message brokers are a better option.

What is service-oriented architecture?

SOA, or service-oriented architecture, was built on the idea of an enterprise service bus, or ESB. An ESB is a system that helps to connect different applications and services together. By using an ESB, organizations can more easily share data and information between different applications and services.

One of the benefits of using an ESB is that it can help to improve communication between different applications and services. This can help to make sure that data is accurate and up-to-date, and that information is shared in a timely manner. Additionally, using an ESB can help to reduce the amount of duplicate data that is stored in different applications and services.

What is an ESB?

An enterprise service bus (ESB) is a software architecture that enables different applications to communicate with each other. It acts as an intermediary between different applications and handles the communication between them.

However, an ESB can also become a single point of failure (SPOF) if it is not implemented correctly. This can happen if the ESB is not highly available or if it does not have failover capabilities. If the ESB goes down, then all the applications that are connected to it will also go down.

What are microservices?

Microservices have quickly become the preferred architecture for building modern applications. There are many reasons for this, but one of the biggest is that microservices allow for much more flexibility and agility than traditional ESBs.

In a microservices architecture, each service is its own independent entity. This means that each service can be developed, deployed, and scaled independently. This contrasts with an ESB, where all services are tightly coupled and must be deployed and scaled together.

Flexibility and agility are critical in today’s fast-paced world. Organizations need to be able to quickly add or remove features, and they need to be able to do so without affecting the rest of the system. With microservices, they can.

There are other benefits to microservices as well, such as improved resilience and better performance. But the flexibility and agility are the main reasons why microservices have replaced ESBs as the preferred architecture for modern applications.

Facilitating microservices communication through message queues 

Message queues are a great way to facilitate communication between microservices because they provide a way for services to exchange messages asynchronously. This means that one service can send a message to the queue, and another service can receive and process the message later. Message queues are also scalable and fault-tolerant, which is important for microservices. If one service goes down, the other services can still continue to operate. 

There are a lot of different ways that microservices can communicate with each other. One popular way is to use message queues like AWS SQS, RabbitMQ, Apache Kafka, or Redis.

AWS SQS is a reliable and scalable message queue that can be used for a variety of purposes. RabbitMQ is a popular open-source message queue that is easy to use and has a wide range of features. Apache Kafka is a high-performance message queue that is designed for streaming data. Redis is a fast and versatile message queue that can be used for a variety of use cases.

How message brokers enable microservices communication

Message brokers are important for enabling communication between microservices. They provide a means for microservices to communicate with each other asynchronously. This is important because it allows each microservice to continue processing requests even if another microservice is unavailable.

Without message brokers, a microservice would have to wait for another microservice to become available before it could continue processing requests. This would lead to slower response times and could impact the system’s overall performance.

Message brokers also provide a way for microservices to scale. If a microservice needs to handle more requests, it can simply connect to a message broker and start processing messages. This can be done without impacting the other microservices in the system.


Many different messaging solutions are available today, and it can be hard to choose the right one for your needs. Message brokers and enterprise service buses (ESBs) are two popular options, but they have different strengths and weaknesses. 

When choosing a messaging solution, it’s important to weigh your needs and choose the option that best fits your use case. An ESB may be the best option if you need a simple solution for a monolithic application, or an app with few services. A message broker may be a better choice if you need a more powerful solution that can handle many-to-many communication between distributed microservice applications.

If you have questions related to this topic, feel free to book a meeting with one of our solutions experts, mail to sales@amazic.com.


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