Nginx
The high-performance web server and reverse proxy behind millions of websites.
Nginx is an open-source web server and reverse proxy created by Igor Sysoev in 2004 and now backed commercially by F5, Inc. It is one of the most widely used web servers in the world, responsible for delivering websites quickly and securely.
Nginx (pronounced "engine-x") is web server software: it accepts requests from browsers and delivers a site's pages, images, and other files to visitors. Igor Sysoev created it in 2004 to solve the high-concurrency problems of the Russian portal Rambler. The project is open source, distributed free under the permissive BSD-2-Clause license, with F5, Inc. running the commercial side since 2019.
Nginx's biggest advantage is its event-driven architecture. Traditional servers spawn a separate process or thread (a parallel unit of work) for each visitor, which exhausts memory under heavy load. Nginx instead handles tens of thousands of simultaneous connections with just a few worker processes, so the same hardware can serve far more visitors with far fewer resources.
Nginx is more than a file server - it also works as a reverse proxy. A reverse proxy is a gatekeeper standing between visitors and the actual application server: it receives requests, forwards them to the right backend, and returns the response. This setup lets you terminate SSL/HTTPS in one place, cache static assets (keep copies in fast temporary storage), and hide backend servers from direct internet exposure.
On top of that, Nginx offers load balancing (spreading requests across multiple servers), compression (gzip/brotli), rate limiting, and caching. This flexibility is why, according to survey sources like W3Techs, Nginx has for years been one of the world's two most-used web servers alongside Apache.
Frequently asked questions
Nginx is open-source web server software: it accepts browser requests and delivers website pages to visitors. It is also widely used as a reverse proxy (an intermediary in front of backend servers), a load balancer, and a cache server. Created by Igor Sysoev in 2004, it is now one of the most-used web servers in the world.



