What is LiteSpeed Web Server?

LiteSpeed is a high-performance web server software that is significantly faster than Apache for serving WordPress and PHP applications. It includes built-in caching (LSCache), HTTP/3 support, and is a drop-in replacement for Apache that uses the same .htaccess configuration files.

What is LiteSpeed Web Server?

LiteSpeed Web Server (LSWS) is a commercial web server software developed by LiteSpeed Technologies. It is designed as a high-performance, drop-in replacement for Apache — meaning it can use the same configuration files and work with existing cPanel setups, while delivering dramatically better performance, especially for WordPress and PHP-based applications.

LiteSpeed vs. Apache vs. Nginx

  • Apache — The traditional standard. Highly compatible and flexible, but slower under high concurrent loads.
  • Nginx — Fast for serving static files and as a reverse proxy, but requires separate caching solutions for dynamic content.
  • LiteSpeed — Outperforms both for PHP/WordPress workloads in most benchmarks. Its built-in LSCache is one of the most effective full-page caching solutions available.

LiteSpeed Cache (LSCache)

LiteSpeed Cache is a server-level caching solution that works with a free WordPress plugin. Unlike plugin-based caches (WP Rocket, W3 Total Cache), LSCache operates at the server level — it can serve cached pages as pure static files before PHP or WordPress even loads, achieving sub-50ms TTFB on cached pages. It also includes:

  • Browser cache optimization
  • CSS and JavaScript minification and combination
  • Image optimization and lazy loading
  • Critical CSS generation
  • Database optimization

HTTP/3 and QUIC Support

LiteSpeed was one of the first web servers to support HTTP/3 (the latest HTTP protocol, based on QUIC), which reduces connection overhead and improves performance on mobile networks and in high packet-loss environments.

OpenLiteSpeed

OpenLiteSpeed is the free, open-source version of LiteSpeed. It lacks some enterprise features (like cPanel integration) but is widely used in cloud environments and on self-managed VPS servers. CyberPanel is a popular free control panel built around OpenLiteSpeed.