Server Usage Distribution in the Top 1 Million Sites

Distribution for websites using Server technologies

Technology	Websites	%
IPv6	471,734	47.17
Ubuntu	89,059	8.91
Envoy	43,817	4.38
OpenSSL	40,126	4.01
QUIC	32,487	3.25
Parallels Plesk Panel	30,034	3
Debian	26,992	2.7
CentOS	20,947	2.09
GitHub Hosting	10,660	1.07
Unix	10,021	1
Red Hat Enterprise Linux	5,631	0.56
mod_pagespeed	5,232	0.52
AlmaLinux	3,141	0.31
mod_perl	2,859	0.29
mod_ssl	2,754	0.28
FreeBSD	1,932	0.19
Apache Tomcat JK	1,895	0.19
Win32 Header	1,736	0.17
Fedora	1,391	0.14
Limiter Modules	849	0.08
Suhosin	545	0.05
Squid	447	0.04
Gentoo Linux	365	0.04
Alternate Protocol	158	0.02
Hiawatha	67	0.01
GZIP Module	63	0.01
Auth Passthrough	49	0
HHVM	46	0
Go Server	25	0
PowerPC	15	0
Joyent JWS	15	0
Cisco/Arrowpoint Content Service Switch	11	0
OpenGSE	1	0