OpenLiteSpeed

Spec sheet

Product

OpenLiteSpeed is the open-source edition of LiteSpeed Web Server Enterprise.Read 4 Oct 2026 · openlitespeed.org

Intended users

The maker describes it as a free server for use with any number of domains and any size server under GPLv3.Read 4 Oct 2026 · openlitespeed.org

Integrations

The site describes compatibility with CyberPanel and DirectAdmin, LiteSpeed Cache plugins, and a Prometheus exporter for Prometheus and Grafana.Read 4 Oct 2026 · openlitespeed.org

Security

Listed security features include bandwidth and connection throttling, IP-based access control, strict HTTP request validation, SSL support, and ModSecurity v3 integration.Read 4 Oct 2026 · openlitespeed.org

Support

The support page directs users to documentation, a Google Group, Facebook and Slack communities, and the OpenLiteSpeed forum.Read 4 Oct 2026 · openlitespeed.org

Headquarters

Newtown Square, Pennsylvania, USARead 28 Sep 2026 · openlitespeed.org

Administration

OpenLiteSpeed includes a WebAdmin GUI with a real-time statistics dashboard.Read 4 Oct 2026 · openlitespeed.org

Applications

It supports PHP, Ruby, Python, Perl, and Java external applications; LSAPI is described as improving PHP, Ruby, and Python speeds.Read 4 Oct 2026 · openlitespeed.org

Architecture

It uses event-driven processes designed for low CPU and RAM overhead and high concurrency.Read 4 Oct 2026 · openlitespeed.org

Caching

It includes a customizable full-page cache module and supports LiteSpeed Cache plugins for WordPress, Joomla, Drupal, and MediaWiki.Read 4 Oct 2026 · openlitespeed.org

Install options

Downloads include source, binaries, and ARM builds, and the site links to repository, one-click, and Docker installation methods.Read 4 Oct 2026 · openlitespeed.org

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.Read 4 Oct 2026 · openlitespeed.org

Limitations

OpenLiteSpeed does not support ESI and requires a restart to load a new .htaccess file containing rewrite rules.Read 4 Oct 2026 · openlitespeed.org

Rewrite compatibility

It supports Apache mod_rewrite syntax but does not read .htaccess files or support other Apache directives.Read 4 Oct 2026 · openlitespeed.org

Web protocols

The features page lists HTTP/3 and QUIC support, while the support FAQ says OpenLiteSpeed does not yet support QUIC.Read 4 Oct 2026 · openlitespeed.org

Plans and prices

Every OpenLiteSpeed plan and price →

Where Specifiction places it

• Web Server Software#14 of 367.7