OpenLiteSpeed

openlitespeed.org · checked 4 Oct 2026

#23 · Web Server Software

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How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on Web Server Software6.0#23 of 36

OpenLiteSpeed is the open-source edition of LiteSpeed Web Server Enterprise.

Pricing

OpenLiteSpeedFree to download, use, distribute, and modify · GPLv3Free

As openlitespeed.org lists them, checked 4 Oct 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: openlitespeed.org
Price: Free tier
Free trial: No
Administration: OpenLiteSpeed includes a WebAdmin GUI with a real-time statistics dashboard.
Applications: It supports PHP, Ruby, Python, Perl, and Java external applications; LSAPI is described as improving PHP, Ruby, and Python speeds.
Architecture: It uses event-driven processes designed for low CPU and RAM overhead and high concurrency.
Caching: It includes a customizable full-page cache module and supports LiteSpeed Cache plugins for WordPress, Joomla, Drupal, and MediaWiki.
Headquarters: Newtown Square, Pennsylvania, USA
Install options: Downloads include source, binaries, and ARM builds, and the site links to repository, one-click, and Docker installation methods.
Integrations: The site describes compatibility with CyberPanel and DirectAdmin, LiteSpeed Cache plugins, and a Prometheus exporter for Prometheus and Grafana.
Intended users: The maker describes it as a free server for use with any number of domains and any size server under GPLv3.
Latest release: The downloads page lists OpenLiteSpeed 1.9.3 Stable, dated 2026-09-29, with a new WebAdmin UI and built-in ACME support among its additions.
Limitations: OpenLiteSpeed does not support ESI and requires a restart to load a new .htaccess file containing rewrite rules.
Rewrite compatibility: It supports Apache mod_rewrite syntax but does not read .htaccess files or support other Apache directives.
Security: Listed security features include bandwidth and connection throttling, IP-based access control, strict HTTP request validation, SSL support, and ModSecurity v3 integration.

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