Glassfish is described as 'GlassFish v3, built by the GlassFish community, is the first compatible implementation of the Java EE 6 platform specification. Many of the Java EE 6 themes carry over to Sun GlassFish Enterprise Server v3 - flexibility, extensibility, and developer ease of use' and is an app. There are eight alternatives to Glassfish for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and PHP apps. The best Glassfish alternative is TrailBase, which is both free and Open Source. Other great apps like Glassfish are Payara Server, JBoss, appserver.io and Mako Server.
TrailBase offers a blazingly fast, open-source application server featuring type-safe APIs and real-time data. Built on Rust, with JS/ES6/TS runtime, it provides built-in authentication, admin UI, and low-latency responses. Supports mobile, web, and desktop, eliminating the need for dedicated caches.
Payara Server is an open source, cloud-native middleware platform supporting reliable and secure deployments of Java EE (Jakarta EE) applications on premise, in the cloud or hybrid environments.
Payara Server has everything that GlassFish has plus some more modern features. They share a lot of common code so they mostly work in the same way, meaning you can switch between them without needing to learn new things first.
Payara Server was originally derived from GlassFish when Oracle dropped support.
JBoss is Red Hats Java EE 5-compliant (soon Java EE 6-compliant) application server. It is, as with Red Hat itself, dual-licensed either as open source (community edition) or commercially (enterprise edition).
appserver.io is a multithreaded application server for php written in php. Our technology allows real multi-threading in PHP and different useful services for developers enabling more efficiency and security. And best of all – it is completely open source!
The Mako Server is a compact, ready-to-run web and application server that delivers powerful Lua-based web capabilities with zero setup, just download and go. Its tiny footprint hides a feature-rich engine packed with asynchronous non-blocking sockets and a complete web...
WebSphere Application Server provides the availability and security your business depends on while optimizing cost.
A Java EE 5-certified application server for web and enterprise applications based on Suns Java EE platform specification. The goal of the Geronimo project is to produce a server runtime framework that pulls together the best Open Source alternatives to create runtimes that...
JOnAS is a leading edge Java EE 5 certified Open Source OSGi Enterprise Server by OW2. The License used by JOnAS is the LGPL. The OW2 development community includes many academic institutes (Grenoble University, INRIA, LIFL, Peking University, UPM, ...
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Payara Server was derived from GlassFish, so they share a lot of the same features. However, Payara Server continues to receive frequent updates, full support, bug fixes, etc for community users and support customers.