⚡ 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 1.8% of all websites.
76.2% of these sites use only one web server module, 19.2% 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 59.9% share.
It is followed by PageSpeed with 28.3% and mod_fcgid with 15.1%.

OpenSSL 59.9%
PageSpeed 28.3%
mod_fcgid 15.1%
mod_aclr2 5.7%
WebDAV 5%
mod_bwlimited 3.6%
mod_ssl 3.4%
mod_perl 2.3%
mod_wsgi 1.2%
mod_jk 1.2%
mod_python 0.9%
Swoole 0.6%
mod_fastcgi 0.5%
mod_apreq2 0.3%
mod_gzip 0.3%

You can also drill down by country:

Canada

🚀 Highlights

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

PageSpeed is #1 in Ukraine ^(-1)
mod_aclr2 is #1 in Thailand ^(-3)
mod_fcgid is #2 in the United States ^(-1)
mod_bwlimited is #2 in New Zealand ^(-4)
mod_jk is #2 in Korea ^(-8)
mod_gzip is #2 in Taiwan ^(-13)
WebDAV is #3 in Japan ^(-2)
Swoole is #3 in China ^(-9)
mod_perl is #4 in Russia ^(-4)
mod_python is #5 in the Netherlands ^(-6)

✨ 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	OpenSSLNewark, Delaware, United States An open source software library that provides strong encryption using the SSL and TLS protocols.	59.9%
2	PageSpeedMountain View, California, United States An open-source web server module for rewriting web pages to reduce latency and bandwidth, available for Apache and Nginx.	28.3%
3	mod_fcgidWilmington, Delaware, United States A FastCGI module for the Apache HTTP Server.	15.1%
4	mod_aclr2Wilmington, Delaware, United States	5.7%
5	WebDAVWilmington, 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_bwlimitedHouston, Texas, United States A CPanel module that allows limiting and monitoring of bandwidth and connection speed.	3.6%
7	mod_sslWilmington, Delaware, United States Provides SSL v3 and TLS v1.x support for the Apache HTTP Server.	3.4%
8	mod_perlWilmington, Delaware, United States A module for the Apache web server that embeds a Perl interpreter into the server.	2.3%
9	mod_wsgi An Apache module that implements a WSGI compliant interface for hosting Python based web applications on top of the Apache web server.	1.2%
10	mod_jkWilmington, Delaware, United States A module designed to forward requests from Apache to the Tomcat web server to run Java-based web applications.	1.2%
11	mod_python	0.9%
12	Swoole	0.6%
13	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.	0.5%
14	mod_apreq2Wilmington, Delaware, United States	0.3%
15	mod_gzip	0.3%
16	mod_log_rotate	0.3%
17	mod_qos	0.3%
18	mod_rpaf	0.2%
19	LibreSSLEdmonton, Alberta, Canada A fork of OpenSSL 1.0.1g developed to modernize the codebase and improve security.	0.2%
20	mod_throttle An Apache module specifically designed to reduce server load by controlling and limiting requests according to supported polices.	0.1%
21	mod_auth_pam	0.1%
22	mod_deflate	0.05%
23	JRun	0.02%
24	mod_aclrWilmington, Delaware, United States	0.007%

Data updated September 6, 2025

👉 See Also

🔗 Links
- ⚡Web Servers

When interpreting and using the results, please read our methodology and disclaimer.