⚡ 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.
79.7% of these sites use only one web server module, 15.9% use two, and 4.4% use three or more simultaneously.

Statistics based on 3.3M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading web server modules in 2026, based on market share.

The most popular is OpenSSL, which dominates the market with a substantial 62.1% share.
It is followed by PageSpeed with 26.4% and mod_fcgid with 11.6%.

OpenSSL 62.1%
PageSpeed 26.4%
mod_fcgid 11.6%
mod_aclr2 5.6%
WebDAV 5.2%
mod_ssl 3.2%
mod_bwlimited 2.8%
mod_perl 2.5%
mod_jk 1.5%
mod_wsgi 1.3%
mod_python 0.8%
mod_fastcgi 0.6%
Swoole 0.4%
mod_qos 0.3%
mod_apreq2 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_aclr2 is #1 in Thailand ^(-3)
mod_fcgid is #2 in the United States ^(-1)
mod_jk is #2 in Korea ^(-7)
WebDAV is #3 in Japan ^(-2)
Swoole is #3 in China ^(-10)
mod_python is #5 in the Netherlands ^(-6)

✨ Best Web Server Modules

Below is a more detailed list of 24 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.	62.1%
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.	26.4%
3	mod_fcgid Wilmington, Delaware, United States A FastCGI module for the Apache HTTP Server. FreeOpen source	11.6%
4	mod_aclr2 Lafayette, Colorado, United States An Apache web server module that automates serving static content with NGINX as a reverse proxy. FreeOpen source	5.6%
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. FreeOpen source	5.2%
6	mod_ssl Wilmington, Delaware, United States Provides SSL v3 and TLS v1.x support for the Apache HTTP Server. FreeOpen source	3.2%
7	mod_bwlimited Houston, Texas, United States A CPanel module that allows limiting and monitoring of bandwidth and connection speed.	2.8%
8	mod_perl Wilmington, Delaware, United States A module for the Apache web server that embeds a Perl interpreter into the server. FreeOpen source	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. FreeOpen source	1.5%
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 Wilmington, Delaware, United States An Apache web server module that embeds the Python interpreter within the server, allowing Python code to run many times faster than traditional CGI by executing inside persistent Apache processes. FreeOpen source	0.8%
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 Shanghai, China A high-performance PHP extension that enhances the language with asynchronous I/O, coroutines, and advanced concurrency capabilities. FreeOpen source	0.4%
14	mod_qos A quality of service module for the Apache web server that implements configurable control mechanisms to prioritize and manage HTTP requests to preserve server resources under load. FreeOpen source	0.3%
15	mod_apreq2 Wilmington, Delaware, United States An Apache HTTP Server filter module that connects the libapreq2 request parsing library into the server. FreeOpen source	0.3%
16	mod_gzip	0.3%
17	LibreSSL Edmonton, Alberta, Canada A fork of OpenSSL 1.0.1g developed to modernize the codebase and improve security.	0.2%
18	mod_log_rotate	0.2%
19	mod_rpaf An Apache module that restores the original client IP address when Apache runs behind a reverse proxy by rewriting REMOTE_ADDR based on X-Forwarded-For headers. FreeOpen source	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	0.09%
22	mod_deflate	0.04%
23	JRun	0.02%
24	mod_aclr Wilmington, Delaware, United States An Apache 1.3.x module designed to serve static files efficiently when Apache is used behind Nginx in a combined Nginx-Apache setup. FreeOpen source	0.005%

👉 See Also

⚡Web servers

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,367,747 websites.
We currently track the presence of 24 web server modules across the web.
Statistics were last calculated on April 11, 2026.
For more details, see our methodology and disclaimer.