Gunicorn vs Undertow: What are the differences?
Developers describe Gunicorn as "A Python WSGI HTTP Server for UNIX". Gunicorn is a pre-fork worker model ported from Ruby's Unicorn project. The Gunicorn server is broadly compatible with various web frameworks, simply implemented, light on server resources, and fairly speedy. On the other hand, Undertow is detailed as "A flexible performant web server written in java". 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.
Gunicorn and Undertow can be categorized as "Web Servers" tools.
Gunicorn is an open source tool with 6.03K GitHub stars and 1.14K GitHub forks. Here's a link to Gunicorn's open source repository on GitHub.
Instagram, reddit, and hike are some of the popular companies that use Gunicorn, whereas Undertow is used by CurrencyFair, Notify-e, and Kreomi. Gunicorn has a broader approval, being mentioned in 235 company stacks & 251 developers stacks; compared to Undertow, which is listed in 8 company stacks and 5 developer stacks.