lighttpd vs LiteSpeed: What are the differences?
Developers describe lighttpd as "A secure, fast, compliant, and very flexible web-server that has been optimized for high-performance environments". lighttpd has a very low memory footprint compared to other webservers and takes care of cpu-load. Its advanced feature-set (FastCGI, CGI, Auth, Output-Compression, URL-Rewriting and many more) make lighttpd the perfect webserver-software for every server that suffers load problems. On the other hand, LiteSpeed is detailed as "*A drop-in Apache replacement and the leading high-performance, high-scalability server *". It is a drop-in Apache replacement and the leading high-performance, high-scalability server. You can replace your existing Apache server with it without changing your configuration or operating system details. As a drop-in replacement, it allows you to quickly eliminate Apache bottlenecks in 15 minutes with zero downtime.
lighttpd and LiteSpeed can be categorized as "Web Servers" tools.