Oracle WebLogic Server 12c is the #1 application server across conventional and cloud environments. It is the cornerstone of Oracle cloud application foundation, the industry's most complete, best-of-breed platform for developing cloud applications.
WebSphere Application Server is a software product that performs the role of a web application server. It is a software framework and middleware that hosts Java based web applications.
Payara Server is a fully supported, developer-friendly, open source application server. Payara Server's architecture is innovative, cloud-native and optimized for production deployments. The application server, compatible with Eclipse MicroProfile, is built and supported by a team of DevOps engineers dedicated to the continued development and maintenance of the open source software and committed to optimizing Payara Server as the best option for production Java EE applications.