JBoss is an open-source Java EE-based application server. It is widely used for building, deploying, and hosting enterprise Java applications.
Free and paid versions available
Best WildFly Alternatives ranked by AI · updated Aug 2026
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WildFly is an open-source Jakarta EE application server for deploying enterprise Java applications and services. It provides transactions, messaging, security, clustering, and a modular runtime without requiring a commercial subscription.
Top 6 WildFly alternatives
Jetty is a widely used open-source web server and servlet container. It is maintained by the Eclipse Foundation and provides a lightweight...
GlassFish is an open-source application server project and a product of Oracle Corporation. It allows the deployment of Java EE applications.
JOnAS (Java Open Application Server) is an open-source Java EE application server. It is designed to handle large-scale enterprise applications.
Payara Server is a fully supported, developer-friendly, open-source application server. It's derived from GlassFish Server Open Source Edition, with additional bug fixes,...
Free and paid versions available
Undertow is a lightweight, embeddable Java web server and Servlet container for developers building high-performance applications. It combines non-blocking I/O with a...
Pros
- Lightweight runtime footprint compared with full Java application servers
- Supports both blocking and non-blocking request handling
- Embeds cleanly into Java applications and frameworks
Cons
- Smaller ecosystem and community than Tomcat or Netty
- Less familiar configuration model for developers coming from Tomcat
- Fewer standalone deployment resources and tutorials than larger alternatives
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