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NATS Server vs Apache Kafka: catalog facts
NATS Server	Apache Kafka
Best for: Developers building distributed systems that need a messaging backbone	Best for: Teams building event-driven systems and data pipelines on their own infrastructure
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	Self-hosted, Command line
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	High message throughput with low latency across a cluster Durable, fault-tolerant storage of event streams All 4 strengths for Apache Kafka High message throughput with low latency across a cluster Durable, fault-tolerant storage of event streams Built-in stream processing with exactly-once semantics Clusters can span availability zones and regions
Infrastructure component that needs NATS clients in your applications Aimed at developers and operators, not end users	Designed for clustered server deployments rather than individual desktop use Running and tuning a production cluster takes operational effort
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 Kafka kafka.apache.org Catalog checked October 1, 2026

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