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NATS Server vs RabbitMQ: catalog facts
NATS Server	RabbitMQ
Best for: Developers building distributed systems that need a messaging backbone	Best for: Developers connecting services through a self-hosted message queue
Free Free and open source under the Apache 2.0 licence.	Free Free under MPL 2.0; Broadcom sells a commercial edition with support.
Windows, Self-hosted, Command line	Windows, macOS, Linux, Self-hosted
Built for high performance Runs on servers, in Docker or at the edge All 3 strengths for NATS Server Built for high performance Runs on servers, in Docker or at the edge Large, actively maintained open-source project	Supports AMQP 1.0 and MQTT 5.0 Both queues and streams in one broker All 4 strengths for RabbitMQ Supports AMQP 1.0 and MQTT 5.0 Both queues and streams in one broker Runs locally, on-premises or in the cloud Client libraries for many languages
Infrastructure component that needs NATS clients in your applications Aimed at developers and operators, not end users	Running a cluster in production takes operational knowledge Extended support and some features are in the paid Tanzu edition
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: Apache-2.0	License: MPL-2.0
No account needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for NATS Server nats.io github.com/nats-io/nats-server Catalog checked October 2, 2026	Official website Full listing and sources Sources for RabbitMQ rabbitmq.com Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.