NGINX (pronounced 'engine-x') is an open-source software for web serving, reverse proxying, caching, load balancing, media streaming, and more. It is known for its high performance, stability, rich feature set, simple API, and low resource consumption. NGINX is widely used in high-traffic websites and applications. While the article focuses on NGINX's role in Kubernetes Ingress, the company's broader offering encompasses a comprehensive suite of solutions for modern application delivery and security.