LiteSpeed Web Server

LiteSpeed Web Server

Because performance matters!

  • Increased Performance and Stability
  • Increased Server Security
  • Full HTTP/2 support
  • Apache Compatible

Increased Performance and Stability

    With its streamlined event-driven architecture, LiteSpeed Web Server (LSWS) shows incredible performance in terms of
    both scalability and raw speed. Tests show that it is 10 times faster than Apache, taking advantage of high-performance kernel
    syscalls, while LSAPI makes LSWS more than 50% faster in PHP content delivery than Apache (even with with mod_php) when
    it comes to dynamic content.

    LSWS serves more users, handles traffic spikes, and neutralizes DDoS attacks without new hardware.

    Static File Performance: Apache (1x), LiteSpeed (6x*) | PHP Performance: Apache (1x), LiteSpeed (1.5x*) | Perl Performance: Apache (1x), LiteSpeed (2x*) | CGI Performance: Apache (1x), LiteSpeed (2x*)

    * Based on benchmarks performed by LiteSpeed Technologies.

Increased Server Security

Full HTTP/2 support

    LiteSpeed is the first web server to support the HTTP/2 standard. HTTP2/ is the Second Major Revision of the HTTP Network
    Protocol created by The Working Group and based on Google’s SPDY network protocol, HTTP/2 is the first major improvement to
    the HTTP standard in almost 20 years. As of May 2015, HTTP/2 has been published as RFC 7540.

    One of the primary goals when creating HTTP/2 was to maintain high compatibility with HTTP/1.1. As such the HTTP semantics have
    not been changed ensuring backwards-compatibility. Browsers will also automatically switch from HTTP/1.1 to HTTP/2 if both they
    and the server support it. This switch is both instant and invisible to the user.

Apache Compatible

    LiteSpeed Web Server is compatible with commonly used Apache features, including mod_rewrite, .htaccess,
    and mod_security. LSWS can load Apache configuration files directly. Unlike other frontend proxy-based
    solutions, LSWS replaces all Apache functions.


    Apache 1.3/2.0 LiteSpeed 2.1
    PHP/Ruby LSAPI No Built-in
    Ruby on Rails Integration No Yes
    Memory Footprint Large (process/threads) Small (event-driven)
    Scalability Poor (~1000 concurrent clients) Excellent (20,000+ concurrent clients, SMP Linear)
    Administration Commandline Web GUI
    Configuration Format text XML
    Upgrades Manual Auto+Manual
    Product Support 3rd Party 24/7 Support
    High Performance Proxy Add-on Built-in
    Static Load Balancer 3rd Party Built-in
    LDAP 3rd Party Built-in
    Anti-DDoS 3rd Party Built-in
    Connection Throttle 3rd Party Built-in
    Bandwidth Throttle 3rd Party Built-in