Usage Distribution in the Top 1 Million Sites

Distribution for websites using technologies

Technology	Websites	%
IPv6	502,308	50.23
Ubuntu	89,564	8.96
Envoy	40,673	4.07
OpenSSL	39,273	3.93
QUIC	33,354	3.34
Parallels Plesk Panel	30,503	3.05
Debian	25,112	2.51
CentOS	23,145	2.31
GitHub Hosting	9,805	0.98
Unix	9,085	0.91
Red Hat Enterprise Linux	5,794	0.58
mod_pagespeed	5,263	0.53
mod_ssl	3,125	0.31
AlmaLinux	2,996	0.3
mod_perl	2,905	0.29
Apache Tomcat JK	2,005	0.2
FreeBSD	1,893	0.19
Win32 Header	1,887	0.19
Fedora	1,417	0.14
Limiter Modules	964	0.1
Suhosin	596	0.06
Squid	463	0.05
Gentoo Linux	368	0.04
Alternate Protocol	158	0.02
GZIP Module	85	0.01
Hiawatha	68	0.01
Auth Passthrough	62	0.01
HHVM	49	0
Go Server	23	0
Joyent JWS	19	0
Cisco/Arrowpoint Content Service Switch	16	0
PowerPC	10	0
OpenGSE	1	0