OpenLiteSpeed Free and Open Source Web Server 2023-05-18 16:04:05 High-performance, lightweight, open source HTTP server developed by LiteSpeed Technologies. Download, use, distribute, and modify OpenLiteSpeed under GPLv3.


Fewer processes, less overhead, more connections, and enormous scalability, with no hardware upgrade required!

Add the popular LiteSpeed Cache for WordPress plugin, and you get a 100% open source, accelerated hosting platform for WordPress.

Open Source

OpenLiteSpeed is the Open Source edition of LiteSpeed Web Server Enterprise.

Both servers are actively developed and maintained by the same team, and are held to the same high-quality coding standard.

OpenLiteSpeed contains all of the essential features found in LiteSpeed Enterprise, and represents our commitment to support the Open Source community.

ols admin


Why Use OpenLiteSpeed?

OpenLiteSpeed combines speed, security, scalability, optimization and simplicity in one friendly open-source package.

Download OpenLiteSpeed today, and see what it can do for your sites!

  • Event-Driven Architecture

    Fewer processes, less overhead, and enormous scalability
  • HTTP/3 & HTTP/2 Support

    Serves your site with the latest internet protocols
  • mod_rewrite Compatible

    Rewrite engine understands Apache rewrite rule syntax
  • Multiple PHP Support

    Supports embedded PHP, LSAPI for 2x faster external apps
  • Friendly Admin Interfaces

    Builtin WebAdmin GUI, CyberPanel, or DirectAdmin control panel
  • Built for Speed and Security

    Anti-DDoS features, bandwidth throttling, WAF support, and more
  • Intelligent Cache Acceleration

    Efficient, highly customizable full-page cache module
  • PageSpeed Optimization

    Automatically implement Google's PageSpeed optimization system
  • CMS Acceleration

    WordPress, Drupal, Joomla and more: superior performance
  • ModSecurity Integration

    mod_security v3 integration provides Layer-7 protection
  • One-Click Installation

    Install OpenLiteSpeed, MariaDB, and WordPress in one click
  • Multi-Thread Module

    The fastest web service platform using custom MT module


Download, use, distribute and modify OpenLiteSpeed freely under GPLv3.

Want to use OpenLiteSpeed in a proprietary product? Contact us about obtaining an OEM license.




See the maximized performance you can get from your current hardware, just by switching to OpenLiteSpeed!

We compare OpenLiteSpeed against other web servers in a series of benchmarks designed to measure server response time, communication time with PHP, WordPress acceleration, and more.

HTTP/3 Support

LiteSpeed is the first to provide a production-ready implementation of this new Internet protocol, previously known as HTTP-over-QUIC.

Learn more about HTTP/3 and LiteSpeed's pioneering efforts here!

Install OpenLiteSpeed

Whether you use our one-click options, or take advantage of CyberPanel support, installation of OpenLiteSpeed is easy.