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NATS Server vs Apache ActiveMQ: catalog facts
NATS Server	Apache ActiveMQ
Best for: Developers building distributed systems that need a messaging backbone	Best for: Teams that need a self-hosted message broker for their applications
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the Apache 2.0 licence.
Windows, Self-hosted, Command line	Windows, 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 JMS, AMQP, STOMP and MQTT Clients available for many languages All 4 strengths for Apache ActiveMQ Supports JMS, AMQP, STOMP and MQTT Clients available for many languages High availability and networks of brokers Regular maintenance releases on several series
Infrastructure component that needs NATS clients in your applications Aimed at developers and operators, not end users	Requires Java and server administration Aimed at developers and operators, not end users
Downloadable app, Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: Apache-2.0	License: Apache-2.0
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
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 Apache ActiveMQ activemq.apache.org Catalog checked October 2, 2026

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