⚡ Web Server Modules

Web server modules are software components that extend the functionality of a web server by providing features such as authentication, caching, load balancing, URL rewriting, and security enhancements.

According to our data, web server modules are used on 1.7% of all websites.
78.6% of these sites use only one web server module, 16.8% use two, and 4.6% use three or more simultaneously.

⭐ Most Popular in 2025

The following chart shows the leading web server modules in 2025, based on market share.

The most popular is OpenSSL, which dominates the market with a substantial 60.8% share.
It is followed by PageSpeed with 27.1% and mod_fcgid with 12.7%.

OpenSSL 60.8%
PageSpeed 27.1%
mod_fcgid 12.7%
mod_aclr2 6.2%
WebDAV 5%
mod_ssl 3.4%
mod_bwlimited 3.1%
mod_perl 2.5%
mod_jk 1.3%
mod_wsgi 1.3%
mod_python 0.9%
mod_fastcgi 0.6%
Swoole 0.5%
mod_apreq2 0.3%
mod_qos 0.3%

You can also drill down by country:

🚀 Country Highlights

Here is a list of modules that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

PageSpeed is #1 in Ukraine ^(-1)
mod_fcgid is #2 in China ^(-1)
mod_aclr2 is #2 in the Netherlands ^(-2)
WebDAV is #3 in Japan ^(-2)
mod_bwlimited is #4 in the United States ^(-3)

✨ Best Web Server Modules

Below is a more detailed list of all web server modules we track, ranked by their market share.

Rank	Name	Market share
1	OpenSSL Newark, Delaware, United States An open source software library that provides strong encryption using the SSL and TLS protocols.	60.8%
2	PageSpeed Mountain View, California, United States An open-source web server module for rewriting web pages to reduce latency and bandwidth, available for Apache and Nginx.	27.1%
3	mod_fcgid Wilmington, Delaware, United States A FastCGI module for the Apache HTTP Server.	12.7%
4	mod_aclr2 Wilmington, Delaware, United States	6.2%
5	WebDAV Wilmington, Delaware, United States The WebDAV (Web-based Distributed Authoring and Versioning) module allows users to collaboratively edit and manage files on remote web servers.	5%
6	mod_ssl Wilmington, Delaware, United States Provides SSL v3 and TLS v1.x support for the Apache HTTP Server.	3.4%
7	mod_bwlimited Houston, Texas, United States A CPanel module that allows limiting and monitoring of bandwidth and connection speed.	3.1%
8	mod_perl Wilmington, Delaware, United States A module for the Apache web server that embeds a Perl interpreter into the server.	2.5%
9	mod_jk Wilmington, Delaware, United States A module designed to forward requests from Apache to the Tomcat web server to run Java-based web applications.	1.3%
10	mod_wsgi An Apache module that implements a WSGI compliant interface for hosting Python based web applications on top of the Apache web server.	1.3%
11	mod_python	0.9%
12	mod_fastcgi A third-party module for the Apache web server that enables the FastCGI protocol for communicating with applications that generate dynamic content for web pages.	0.6%
13	Swoole	0.5%
14	mod_apreq2 Wilmington, Delaware, United States	0.3%
15	mod_qos	0.3%
16	mod_gzip	0.3%
17	mod_log_rotate	0.3%
18	LibreSSL Edmonton, Alberta, Canada A fork of OpenSSL 1.0.1g developed to modernize the codebase and improve security.	0.2%
19	mod_rpaf	0.2%
20	mod_throttle An Apache module specifically designed to reduce server load by controlling and limiting requests according to supported polices.	0.2%
21	mod_auth_pam	0.1%
22	mod_deflate	0.05%
23	JRun	0.02%
24	mod_aclr Wilmington, Delaware, United States	0.006%

👉 See Also

🔗 Links
- ⚡Web Servers

Data is based on the analysis of 2,764,714 websites.
Statistics were last calculated on December 28, 2025.
For details, see our methodology and disclaimer.