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RabbitMQ vs NATS Server: catalog facts
RabbitMQ	NATS Server

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

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