NATS

What it does

Client libraries

Official clients are listed for Go, Rust, JavaScript, TypeScript, Python, Java, C#, C, Ruby, Elixir, and a CLI, with 30+ community-contributed clients.checked 4 Oct 2026

Data features

Pub/sub, request/reply, queueing, streaming, key-value, and object storage operate within the same system.checked 4 Oct 2026

Deployment

NATS is designed for distributed systems and edge deployments, and supports topology growth using leaf nodes and superclusters.checked 4 Oct 2026

Integrations

The download page lists connectors and utilities for Apache Flink, Apache Spark, AWS, Elasticsearch, Fluent Bit, MongoDB, Prometheus, and other tools.checked 4 Oct 2026

Intended users

NATS is aimed at teams building distributed systems with dynamic, loosely coupled services, including deployments on low-resource edge devices.checked 4 Oct 2026

License

The NATS server and clients are open source under the Apache 2.0 license.checked 4 Oct 2026

Messaging patterns

NATS supports pub/sub, request/reply, and persistent streaming through JetStream.checked 4 Oct 2026

Performance

The site says NATS can deliver millions of messages per second with sub-millisecond latencies across globally distributed systems.checked 4 Oct 2026

Project affiliation

NATS is a Cloud Native Computing Foundation incubating project.checked 4 Oct 2026

Purpose

NATS is an open-source messaging system for building distributed systems across clouds and user-defined edge environments.checked 4 Oct 2026

Resource use

The server is a single binary with no external dependencies and typically uses less than 20 MB of RAM.checked 4 Oct 2026

Security

NATS documents authentication, subject-level authorization, TLS encryption, and isolated accounts for multitenancy.checked 4 Oct 2026

Support and community

The project directs users to its Slack channel, GitHub discussions, and [email protected] for questions, comments, or requests.checked 4 Oct 2026