Undertow logo


A flexible performant web server written in java
+ 1

What is Undertow?

It is a flexible performant web server written in java, providing both blocking and non-blocking API’s based on NIO. It has a composition based architecture that allows you to build a web server by combining small single purpose handlers. The gives you the flexibility to choose between a full Java EE servlet 4.0 container, or a low level non-blocking handler, to anything in between.
Undertow is a tool in the Web Servers category of a tech stack.

Who uses Undertow?

15 companies reportedly use Undertow in their tech stacks, including deleokorea, MercadoLibre, and Biting Bit.

34 developers on StackShare have stated that they use Undertow.

Undertow Integrations

Pros of Undertow
Lower footprint

Undertow's Features

  • Flexible Web Server
  • composition based architecture

Undertow Alternatives & Comparisons

What are some alternatives to Undertow?
It is a flexible, lightweight, managed application runtime that helps you build amazing applications. It supports the latest standards for web development.
Apache Tomcat
Apache Tomcat powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations.
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.
Writing scalable server applications in the Java™ programming language has always been difficult. Before its advent, thread management issues made it impossible for a server to scale to thousands of users. This framework has been designed to help developers to take advantage of the Java™ NIO API.
Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.
See all alternatives

Undertow's Followers
93 developers follow Undertow to keep up with related blogs and decisions.