Open Liberty

openliberty.io · checked 29 Sept 2026

#4 · Application Servers

Visit openliberty.io ↗ Alternatives Open Liberty vs Lucee Server

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Application Servers6.2#4 of 28

Open Liberty is a lightweight open framework for building cloud-native Java microservices.

Pricing

Open LibertyFree to use · Open source server runtimeFree

As openliberty.io lists them, checked 29 Sept 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: openliberty.io
Price: Free tier
Free trial: No
Authentication: The MicroProfile JWT feature can authenticate users with JSON Web Tokens and supports role-based access controls.
Deployment: Open Liberty can be containerized and deployed to Kubernetes clouds.
Developer mode: Dev mode provides automated testing, debugger support, and handles compiling, packaging, and deploying during development.
Developer tools: Liberty Tools supports Eclipse IDE, Visual Studio Code, and IntelliJ IDEA, with code completion, hover descriptions, and configuration diagnostics.
Download channels: The download page offers stable, beta, and nightly builds; it notes that nightly builds may be unstable and beta content can change.
Integrations: The site lists Jenkins, Spring, Docker, Grafana, Gradle, Logstash, Prometheus, Maven, Kubernetes, Kibana, and Elasticsearch integrations.
Java standards: It supports MicroProfile and Jakarta EE features that can be added or removed as needed.
Observability: The site describes tracing services, gathering metrics, configuring alerts, and consolidating and analyzing logs.
Release verification: The download page says release packages can be checked for authenticity and integrity using provided signature and certificate files.
Startup and memory: The runtime starts quickly, has a low memory footprint, and supports live reload.
Upgrade compatibility: Its zero-migration design aims to let existing applications and configurations work across runtime updates, with documented exceptions including security fixes and third-party API requirements.

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