Best MQTT Brokers of 2025

Use the comparison tool below to compare the top MQTT Brokers on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

Overview of MQTT Brokers

MQTT brokers are the hub of any MQTT-based system, acting as a communication intermediary between publishers and subscribers. They provide essential functions such as message brokering, which is the routing of messages between devices, data storage, and scaling capabilities to support multiple connections. By leveraging a broker, publishers and subscribers can communicate regardless of their network connection or topology.

When subscribing to an MQTT topic, a client will send the broker with its subscription request. The broker will then store this subscription along with details such as its associated Quality of Service (QoS) level. When a publisher sends a message to the same topic, the broker will forward it to any clients that have subscribed to that particular topic using the QoS settings specified in each subscription request.

The most popular open source MQTT brokers are Eclipse Mosquitto and IBM’s ActiveMQ. Other commercial offerings include HiveMQ and VerneMQ, both of which offer their own set of features for enterprise users.

When selecting an MQTT broker for your use case you should consider various factors such as scalability requirements, reliability expectations, hardware needs and licensing model availability (if applicable). Depending on your use case you may want to consider hosting your own broker or taking advantage of cloud solutions such as Amazon AWS IoT (Amazon Web Services Internet Of Things) or Microsoft Azure IoT Hub which provide fully managed solutions out of the box while still allowing you to take full control over your data if needed.

Finally when configuring an MQTT broker it is important that security is taken into account by setting up authentication & encryption mechanisms in order to protect against potential malicious actors or external threats. In addition monitoring performance metrics should be done regularly in order to ensure acceptable response times for all operations taking place within the system under load conditions in production scenarios

Why Use MQTT Brokers?

1. Easy to Set Up: Setting up an MQTT broker is relatively straightforward, which makes it a cost-effective option for many companies.
2. Low Bandwidth Use: MQTT requires less bandwidth than other message queues, making it an ideal choice for devices that have limited bandwidth or are running on slow data networks.
3. Simple Protocol Design: MQTT was designed with simplicity in mind, making it easy for developers to use and implement quickly and effectively in their existing system architecture.
4. Secure Communication: The authentication feature of the protocol ensures secure communication between devices while eliminating any potential threats posed by external sources.
5. Publish/Subscribe Model: The publish/subscribe (pub/sub) model used by MQTT allows clients to receive only the messages they need without having to continuously listen in on all topics related to their application. This saves time and resources while ensuring reliable delivery of data even if some packets are lost in transit over unreliable networks .
6. High Availability: Since MQTT brokers can be implemented using clustering, they provide high availability and scalability options so businesses can scale up as needed without having to worry about downtime failures or outages reducing productivity levels throughout the enterprise landscape.

Why Are MQTT Brokers Important?

MQTT brokers are an important component of the Internet of Things (IoT). They enable devices and services to communicate and share data with each other in a secure and reliable manner. By connecting different kinds of devices, applications and services without needing complex coding, MQTT brokers make it possible for enterprises to realize the full potential of the IoT.

One of the major advantages of MQTT brokers is that they help improve scalability. As more sensors, actuators, machines, and mobile devices become connected on an IoT network, having a messaging protocol that can efficiently handle large volumes of messages becomes essential. With its asynchronous communications model as well as its support for SSL/TLS security encryption protocols, MQTT brokers allow efficient communication between many endpoints at once while ensuring secure data transmission. This makes them ideal for creating scalable networks with large numbers of connected devices or users.

Another benefit offered by MQTT brokers is their low latency times due to the small packet sizes used in message transmission. Smaller packets mean faster throughput since there is less overhead on the network resources when sending data over it. The reduced latency times gained through using an MQTT broker can be invaluable in a variety of real-time operational contexts such as remote monitoring systems or factory automation scenarios where quick response times are essential for optimal performance.

In addition to being highly scalable and offering fast response times, MQTT brokers also provide robustness against failure conditions like lost connections or power outages thanks to their store-and-forward capabilities and built-in Quality Of Service parameters which guarantee important messages will get delivered even if they were sent while disconnected from the broker. This means any critical messages sent through an MQTT broker are guaranteed delivery even during worst-case scenarios which could significantly disrupt most other types of systems not equipped with this kind of fail-safe protection mechanism.

Overall then there’s no question that MQTT brokers are extremely valuable components of modern IoT networks and play key roles in helping enable new levels of interconnectivity across broad swaths of connected devices while providing reliable security along with improved scalability and robustness against failures too - making them critical assets both now and into the future as more businesses seek to take advantage of what the IoT has to trade.

MQTT Brokers Features

1. Publish/Subscribe: MQTT brokers provide a publish/subscribe messaging system which allows applications to subscribe and receive messages from topics, or publish messages to topics. The broker ensures that all subscribed clients will receive the message associated with a particular topic.
2. Quality of Service (QoS): MQTT brokers can ensure guaranteed delivery of messages by utilizing Quality of Service (QoS) levels. There are three levels available: 0, 1, and 2; each level increasing in reliability at the cost of increased latency due to more processing time taken for delivery and acknowledgements sent back about the successful or failed delivery.
3. Security: With security methods such as TLS encryption and user credentials, MQTT brokers can keep communication secure and protected from unauthorized access with secure connection protocols like SSL/TLS or password authentication, ensuring user privacy when sending data over MQTT networks.
4. Last Will & Testament Message: A client may subscribe to an LW&T message topic within an MQTT broker in order to be notified when another client disconnects unexpectedly before it has time to properly close its connections on the network. This feature provides notification if the connection between two clients is dropped abruptly so that one client can take any necessary action in response to this unexpected event, such as resending data that was being transmitted when it was cut off suddenly.
5. Retained Messages: With retained messages, MQTT Brokers enable clients who have just joined after a specific message has already been sent out across all other connected devices so they will still get caught up on any missed information communicated prior to their subscription date by receiving a copy of what was previously discussed on that particular topic subscription channel upon connecting for the first time even though other clients may have already moved onto different conversations since then.

What Types of Users Can Benefit From MQTT Brokers?

• Developers: Developers working on applications that need to communicate with a server can benefit from an MQTT broker. The broker allows them to easily exchange data between devices, enabling quick and efficient development.
• Product Manufacturers: Product manufacturers who develop products that require communication between devices or the internet can benefit from using MQTT brokers to allow their products to link up with other products or share data securely.
• Enterprise Businesses: Businesses looking for a way of exchanging and sharing large volumes of data securely from multiple sources can benefit from an MQTT broker, allowing them to rapidly transmit high volumes of data without compromising security.
• IoT Device Users: IoT device users can take advantage of MQTT brokers because they are designed to handle the huge amounts of data that come along with connected devices and ensure secure transmission over the internet.
• System Integrators: System integrators looking to quickly deploy systems that connect multiple nodes together in a networked infrastructure can benefit from using an MQTT broker, as it makes setting up connections between different nodes quick and easy.
• Mobile Applications: Mobile applications often rely on real time information being transmitted over the internet, making it essential they have access to reliable message brokers such as those provided by MQTT technology. This enables applications to quickly respond in real time without any latency issues.

How Much Do MQTT Brokers Cost?

The cost of an MQTT broker can vary depending on the features you need, the size of your network, and other factors. Generally, you will find that there are some open source brokers available for no cost, as well as commercial enterprise offerings that come with a price tag. Open source solutions tend to require a bit more work and may not be suitable for larger or more complex deployments.

Commercial offerings typically have lower upfront costs than building out your own infrastructure, but ongoing costs like support service fees and feature subscriptions can add up quickly over time. Depending on your needs, there are many options available ranging from free to thousands of dollars per month. If you are looking for something simple like basic message routing and delivery, then a basic commercial plan could be very affordable whereas if you need advanced features such as data processing or analytics capabilities then it may be necessary to invest in a higher priced option.

Risks To Consider With MQTT Brokers

• Unsecured data: Without proper security measures in place, MQTT messages could be intercepted or modified by hackers. This could result in sensitive information being leaked or malicious code being injected into the message stream.
• Denial of Service (DoS) attacks: A DoS attack is when an attacker floods a broker with a large number of requests, causing it to crash or become unresponsive. This can lead to disruption of services and downtime for those relying on the broker for communication.
• Privacy concerns: The ever-evolving network topology of MQTT adds a layer of complexity that can make it difficult to ensure privacy. If not configured correctly, attackers can gain access to topics that contain privileged information about users and systems connected to the broker.
• Extraneous traffic/spam: With its publish/subscribe model, many “noisy” publishers might cause unnecessary traffic on the network, resulting in slower bandwidth utilization and affecting performance overall.

What Software Can Integrate with MQTT Brokers?

Many different types of software can integrate with MQTT brokers. For example, applications such as web browsers, mobile apps, and enterprise systems can be integrated into an MQTT broker in order to access messaging services. Single-page web applications (SPAs) powered by JavaScript frameworks like React or Angular are also able to access these services using the same integration methods. Additionally, programming libraries for several popular languages like Java and Python have been developed to allow software engineers to easily create their own custom implementations of an MQTT broker.

Questions To Ask Related To MQTT Brokers

1. What security features does the MQTT broker offer? It is important to know what kind of encryption and authentication mechanisms are available for protecting data traveling through the MQTT broker.
2. How reliable is the MQTT broker? You want to make sure that your messages will be delivered reliably, so you should ask what kind of uptime guarantees or reliability standards the broker adheres to.
3. How easily can I scale my MQTT infrastructure? It's important to know how quickly you can adjust your messaging architecture when demand increases or decreases, so you should ask about scalable options offered by each broker.
4. What protocols does the MQTT broker support? Make sure that your selected platform supports all of the necessary protocols for communicating with specific devices and systems in addition to providing solid communication between applications using MQTT alone.
5. Does this provider offer any analytics or visualization tools? Understanding how your infrastructure is performing is critical, so it’s a good idea to inquire about any analytics or visualization tools related to usage offered by each platform provider.