What is LiteSpeed Web Server?

LiteSpeed in one paragraph

LiteSpeed Web Server (LSWS) is made by LiteSpeed Technologies. It uses an event-driven architecture, like NGINX, so one process handles thousands of connections with little memory, instead of Apache's one process or thread per connection. Unlike NGINX it reads Apache's configuration files and .htaccess rules directly, which means it can replace Apache on a cPanel, Plesk or DirectAdmin server without rewriting anything, and it supports mod_security rules and mod_rewrite the same way. That combination, NGINX-class performance with Apache compatibility, is why so much shared and managed hosting runs on it.

LiteSpeed vs Apache vs NGINX

Apache is flexible and universally supported, but under heavy concurrent traffic it spends its memory on processes. NGINX is fast and lean but has no .htaccess support and no built-in application cache, so it usually sits in front of something else. LiteSpeed is the one that does both jobs: it replaces Apache outright, speaks its configuration language, serves PHP through its own LSAPI interface (faster than PHP-FPM behind Apache in LiteSpeed's own benchmarks), and caches whole pages with LSCache. The trade-off is licensing: LiteSpeed Enterprise is commercial software the host pays for, while Apache and NGINX are free.

Is LiteSpeed free?

OpenLiteSpeed is the free, open-source edition and is fine for a single site on your own server, though it doesn't read .htaccess on the fly. LiteSpeed Enterprise is the licensed edition hosting companies run, with full Apache compatibility, LSCache and support. As a hosting customer you don't pay for the licence directly; it's part of the plan. All of our cloud hosting and WordPress hosting plans run LiteSpeed Enterprise.

LiteSpeed Web Server handles incoming web requests and serves responses, including static files and output from applications such as WordPress. It is one part of a hosting platform, alongside the runtime, database, storage and network.

What does the web server do?

When a visitor requests a page, the web server applies its configuration and either serves a resource or works with the application to produce a response. A cached public page can follow a shorter path than a request which runs PHP and queries a database. This is why cache state matters when comparing hosting results.

How LSCache fits in

LSCache is LiteSpeed's caching system. WordPress uses the LiteSpeed Cache plugin to communicate with that system and expose optimisation controls. See our LSCache guide for checking cache hits, protecting personalised pages and testing changes. The vendor's WordPress documentation explains the supported plugin features.

Does LiteSpeed guarantee a particular speed?

No software name guarantees a load time or a ranking against every other host. Theme code, plugins, database queries, image sizes and third-party scripts all contribute. Server capacity and cache rules matter too. A comparison needs the same workload, an identified cache state and repeated tests from the same location.

Before moving a client site, record results for a homepage, an important service or product page, and a dynamic journey such as search or checkout. After the move, repeat the checks and verify that the site still behaves correctly. Keep the date and configuration with the results so a later comparison means something.

Choosing a plan

Look at the workload allowance and management as well as the software. Our WordPress hosting includes LiteSpeed and LSCache. Agencies creating client accounts can compare cPanel/WHM or Enhance reseller hosting. The platform specification and each product's resource limits explain what accompanies the web server.

LiteSpeed FAQs

What is LiteSpeed used for?

Serving websites, particularly PHP applications like WordPress, Joomla and Magento, on shared and managed hosting where one server runs many sites. Its page cache is the main reason a WordPress site on LiteSpeed feels faster than the same site on Apache.

Does LiteSpeed replace Apache?

Yes, completely. It reads the same configuration and .htaccess files, so a host can swap Apache for LiteSpeed on an existing server and the sites keep working. It doesn't run alongside Apache; it takes its place.

Do I need the LiteSpeed Cache plugin?

For WordPress, yes if you want page caching: the LiteSpeed Cache for WordPress plugin tells the server which pages to cache and when to purge them. The server does the caching; the plugin manages it. Our guide to LSCache covers the settings that matter.

Why do I need a web server at all?

Something has to listen for HTTP requests, find or generate the right response and send it back. That's the web server. On managed hosting you never touch it; the host chooses and runs it, which is why the choice of host is also the choice of web server.