What is IBM WebSphere Liberty?
IBM® WebSphere® Liberty is a Java EE application server with a low-overhead Java runtime environment designed for cloud-native applications and microservices. WebSphere Liberty was created to be highly composable, start fast, use less memory and scale easily. The WebSphere Liberty architecture shares the same code base as the open-sourced IBM Open Liberty (link resides outside IBM) server runtime. This provides additional benefits such as low-cost experimentation, customization and seamless migration from open source to production.
Use cases
Modernize and simplify
Revolutionize the way you support your application estate. Reduce capital and operational costs, streamline security and simplify management. To get started, analyze your existing Java EE deployments with Transformation Advisor, a no-cost tool that identifies workloads that can easily move to WebSphere Liberty in containers, and complex workloads that can move into VMs.
Build new cloud-native apps
Use the latest Java EE 8 and MicroProfile APIs to build cloud-native apps and deploy them in Docker containers, on premises or in the cloud. Open Liberty gives developers the freedom to innovate and test with the option to deploy with IBM support with Liberty without rewriting any code.
Create a multicloud environment
Meet your multicloud needs with your WebSphere Liberty license, which is portable between cloud service providers. You can deploy wherever your business dictates. Create borderless environments and move apps smoothly across cloud services with easy application portability regardless of your IT architectural environment.
Features
Open source
WebSphere Liberty is built on the Open Liberty project, which provides a modern, 100% open source Java EE, Jakarta EE and MicroProfile runtime. The combination of Open Liberty with traditional WebSphere compatibility features makes WebSphere Liberty an ideal target for modernizing your existing applications.
Lightweight and flexible
The WebSphere Liberty modular architecture means only the features you need are loaded at runtime to help reduce memory consumption. The smaller footprint means you can run more application instances per machine to help reduce production costs.
Fast and scalable
Servers running WebSphere Liberty start faster, making them ideal for rapid scale-up and scale-down of containerized applications as the workload changes. This flexibility gives you a smaller footprint that can yield faster deployment and increased scalability in a cloud environment with less impact on performance, throughput and security.
Benefits
Simplify administration
Benefit from an updated administration console that can make everything easier, from creating instances to patching.
Increase developer productivity
Eliminate rework and retesting to help increase developer productivity. Prototype cloud-native apps in open source, then seamlessly migrate them to production that shares the same code base.
Improve infrastructure utilization
Help improve infrastructure utilization. The smaller Liberty footprint can reduce infrastructure costs by improving server density.
Product versions
IBM Open Liberty
Open Liberty is the OS foundation for the WebSphere Liberty product portfolio. It can be used for developing new cloud-native applications with zero start-up cost.
IBM WebSphere Application Server
This version is appropriate for Java EE Full Profile applications that need to integrate with existing Java EE applications, such as those using JMS.
IBM WebSphere Application Server ND
This version is appropriate for managing Java EE Full Profile applications that run outside of a containerized environment.
Customer success stories
Related products
Liberty entitlement is included with each of the WebSphere products
Get started
Open Liberty
WebSphere Application Server is built upon an open source foundation. Try Open Liberty at no cost and engage with our open source community.
Download trial
Try the WebSphere Application Server Liberty server that includes the complete set of Java EE 8 Full Platform technologies, as well as features such as monitoring and LDAP Registry.