NATS

Spec sheet

Purpose

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

Intended users

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

Deployment

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

Integrations

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

Security

NATS documents authentication, subject-level authorization, TLS encryption, and isolated accounts for multitenancy.Read 4 Oct 2026 · docs.nats.io

License

The NATS server and clients are open source under the Apache 2.0 license.Read 4 Oct 2026 · nats.io

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.Read 4 Oct 2026 · nats.io

Data features

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

Messaging patterns

NATS supports pub/sub, request/reply, and persistent streaming through JetStream.Read 4 Oct 2026 · nats.io

Performance

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

Project affiliation

NATS is a Cloud Native Computing Foundation incubating project.Read 4 Oct 2026 · nats.io

Resource use

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

Support and community

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

Plans and prices

Every NATS plan and price →

Where Specifiction places it

• Message Queue (MQ) Software#19 of 297.5
• Distributed Systems#22 of 307.5
• Message Broker Software#29 of 397.4