OpenLiteSpeed

OpenLiteSpeed is the open-source edition of LiteSpeed Web Server, built by LiteSpeed Technologies. It uses an event-driven, non-blocking architecture that handles thousands of concurrent connections with minimal memory usage. You get a full-featured web server with HTTP/2 and HTTP/3 support, built-in SSL/TLS, a powerful rewrite engine that is compatible with Apache mod_rewrite rules, and a web-based admin console for real-time configuration. It includes a built-in caching engine for static and dynamic content, anti-DDoS connection throttling, and support for PHP via LSAPI which is significantly faster than mod_php or FastCGI. OpenLiteSpeed runs on Linux and integrates with control panels like CyberPanel. The admin interface lets you manage virtual hosts, SSL certificates, security rules, and server settings without touching the command line. It is free to use under the GPLv3 license, though some advanced enterprise features like mod_security and page optimization are reserved for the commercial edition. This server is a solid choice for shared hosting environments or anyone wanting LiteSpeed performance without the license cost.