RabbitMQ vs Solace PubSub+ Event Broker

RabbitMQ9.4Visit Solace PubSub+ Event Broker9.2Visit

Higher score RabbitMQ #1 in Message Broker Software 9.4/10 Free plan Free plan✓ 1 of 1 features Visit RabbitMQ

vs

Solace PubSub+ Event Broker #2 in Message Broker Software 9.2/10 Free plan · 30-day trial Free planFree trial✓ 0 of 1 features Visit Solace

• RabbitMQ fits best

  General-purpose open-source messaging

• Solace PubSub+ Event Broker fits best

  Hybrid event mesh deployments

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Side by side

Feature	RabbitMQ 9.4/10 Visit ↗	Solace PubSub+ Event Broker 9.2/10 Visit ↗
At a glance
Editor score	9.4	9.2
Ranking	#1 in Message Broker Software	#2 in Message Broker Software
Best for	General-purpose open-source messaging	Hybrid event mesh deployments
Pricing model	Free	Free plan + paid
Starting price	Free plan	Free plan · 30-day trial
Free plan	✓	✓
Free trial	—	30 days
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Windows, macOS, Linux	Web
Support	Community, Docs, Email · 24/7	Email, Phone, Tickets, Community · 24/7
Built for	Small business, Mid-market, Enterprise	Mid-market, Enterprise
Features RabbitMQ 1/1 · Solace PubSub+ Event Broker 0/1
Dead-letter queues	✓ (best)	Not checked yet
Specs
Deployment model	Hybrid	Hybrid
Delivery guarantees	Configurable	Not checked yet
Ordering guarantees	Per_queue	Not checked yet
Maximum message size	16 MB	Not checked yet
Supported protocols	AMQP 0-9-1, AMQP 1.0, MQTT, STOMP, RabbitMQ Streams, HTTP, WebSocket	Not checked yet
Our review
Pros	Supports queues, exchanges, routing, acknowledgements, and dead-lettering Offers quorum queues, federation, shovels, and RabbitMQ Streams Supports AMQP, MQTT, STOMP, HTTP, WebSocket, and multiple deployments	Supports pub/sub, queues, request/reply, FIFO and dynamic routing Connects through MQTT, AMQP, JMS, REST, WebSockets and Kafka Combines persistent delivery, direct messaging, replay, HA and disaster recovery
Cons	Commercial Tanzu RabbitMQ support and enterprise features are separate The documented default message-size limit is 16 MB Ordering guarantees apply per queue	Proprietary rather than open source Stream processing is not part of the broker Schema Registry is a separate component
Our verdict	RabbitMQ is an open-source messaging and streaming broker for distributed applications, microservices, real-time data systems, and IoT workloads. It is suited to teams that need general-purpose message queues, exchanges, routing,… Read the review →	Solace PubSub+ Event Broker routes real-time events between applications, services and devices. It is designed for enterprise event-driven architectures, operational event distribution, hybrid-cloud integration and IoT messaging. Teams can… Read the review →

Strengths and trade-offs

• RabbitMQ — where it wins

  • Supports queues, exchanges, routing, acknowledgements, and dead-lettering
  • Offers quorum queues, federation, shovels, and RabbitMQ Streams
  • Supports AMQP, MQTT, STOMP, HTTP, WebSocket, and multiple deployments

  Where it doesn't

  • Commercial Tanzu RabbitMQ support and enterprise features are separate
  • The documented default message-size limit is 16 MB
  • Ordering guarantees apply per queue

• Solace PubSub+ Event Broker — where it wins

  • Supports pub/sub, queues, request/reply, FIFO and dynamic routing
  • Connects through MQTT, AMQP, JMS, REST, WebSockets and Kafka
  • Combines persistent delivery, direct messaging, replay, HA and disaster recovery

  Where it doesn't

  • Proprietary rather than open source
  • Stream processing is not part of the broker
  • Schema Registry is a separate component

• RabbitMQ9.4/10 · Free plan

  A broad, open-source broker for queues, routing, streaming, and hybrid deployments.

  Visit RabbitMQFull verdict →
• Solace PubSub+ Event Broker9.2/10 · Free plan · 30-day trial

  A broad hybrid event broker for teams connecting applications, services and devices.

  Visit SolaceFull verdict →