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NATS Server 2.10.25 is the current long-term-support release of the NATS Authors’ high-performance executable that powers NATS.io, the cloud- and edge-native messaging system. Designed to act as the central nervous system for distributed applications, the server provides a lightweight yet resilient publish-subscribe, request-reply and queueing fabric that can run on a single embedded binary or scale horizontally across clusters spanning public clouds, private data-centres and IoT gateways. Typical use-cases include micro-services choreography, real-time telemetry ingestion, control-plane signalling for Kubernetes, event sourcing, service-mesh sidecars, mobile push backends and AI/ML pipeline triggering, all of which benefit from the server’s sub-millisecond latency, automatic reconnection and built-in interest-based routing. The 2.10.x branch introduced JetStream persistence, allowing exactly-once and at-least-once delivery modes, consumer replication, tiered storage and stream mirroring without external dependencies, while maintaining wire-protocol compatibility with earlier 2.x releases. Operators can deploy the same artifact as a leaf node at the edge, a full cluster in the cloud, or a super-cluster across regions, using identical configuration semantics and zero-downtime rolling upgrades. Security is handled through multi-tenant accounts, hierarchical user permissions, TLS 1.3, NKeys and JWT-based delegation, making the server suitable for regulated environments. Monitoring is exposed via JSON, Prometheus and syslog endpoints, enabling integration with existing observability stacks. Both open-source and commercially supported binaries are offered for Windows, Linux, macOS and ARM, with official Docker images and Helm charts available for container orchestration. NATS Server is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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