Jetty vs Payara: What are the differences?
Jetty: An open-source project providing an HTTP server, HTTP client, and javax.servlet container. Jetty is used in a wide variety of projects and products, both in development and production. Jetty can be easily embedded in devices, tools, frameworks, application servers, and clusters. See the Jetty Powered page for more uses of Jetty; Payara: Recognized Leader in Creating Future-Proof Innovative Infrastructure Software. Payara Server is a drop in replacement for GlassFish Server Open Source Edition with quarterly releases containing enhancements, bug fixes and patches.
Jetty and Payara can be categorized as "Web Servers" tools.
Jetty and Payara are both open source tools. It seems that Jetty with 2.59K GitHub stars and 1.42K forks on GitHub has more adoption than Payara with 699 GitHub stars and 213 GitHub forks.