NGINX Unit is an open-source, lightweight, and versatile web server that can natively execute application code in multiple programming languages. Unit is designed to streamline the web application stack by combining the functionalities of a web server, application server, and process manager into a single software package. It can efficiently handle static resources and run application logic in languages like Python, PHP, Go, Java, JavaScript, Perl, and Ruby without the need for additional software. Unit offers a RESTful JSON API for dynamically configuring the server and instantly updating applications without downtime. It is built on a sophisticated, multi-threaded, asynchronous architecture to ensure robustness, security, and performance.