You are viewing an outdated report. The latest version of this report was published on May 1st, 2025

Web server surveys have been around for a long time. One of the problems with running a survey is how to produce meaningful results given the number of choices with the collection and reporting methodologies. Some examples:

• How does one treat wildcarded DNS sites that generate unlimited number of unique hostnames, all residing on the same system?
• How does one treat taste-testing web sites that do not have any unique content on them at all?
• If very large number of web sites reside on a single IP address, is it a a case of search engine spamming, a large number of low traffic web sites on a single platform, or a web hosting facility using load-redirection for a large number of legitimate web sites?
• How "greedy" or aggressive should the hunt for new web sites be?

All of the above are issues that our conventional web server survey deals with. The biggest issue that comes up time and again, however, is the fact that our conventional survey counts unique hostnames, not unique installations. This can seriously impact market share statistics. Case in point: the data set used both web server survey reports contains (for the last month's data set) 76,324,892 hostnames, but only 5,263,641 distinct IP addresses.

This particular report addresses this in part by counting unique IP addresses in an attempt at answering the question of how many installations of a particular server might exist. By using the IP address as a proxy for the physical hardware on which a server is running, we still need to be aware that it is not a perfect 1 to 1 mapping:

• A load balanced network of servers might share a single public facing IP address, and be undercounted.
• A single server may have multiple public IP addresses bound to one or more network cards on the system, and thus still be counted more than once.

While not a perfect solution, we feel that counting web servers by IP will give a much closer view of the number of server installs for a given technology.

Click any server to see detailed graphs and histories.

Server	April 2017 Count	April 2017 %	March 2017 Count	March 2017 %	Growth %
Apache	2,522,327	47.92	2,522,675	47.94	-0.05
nginx	862,842	16.39	850,512	16.16	1.41
Microsoft-IIS	817,689	15.53	827,630	15.73	-1.24
null	380,638	7.23	379,315	7.21	0.31
Microsoft-HTTPAPI	215,800	4.10	215,838	4.10	-0.06
cloudflare-nginx	80,142	1.52	81,031	1.54	-1.14
Apache-Coyote	51,268	0.97	52,020	0.99	-1.48
IdeaWebServer	50,645	0.96	50,632	0.96	-0.01
LiteSpeed	37,682	0.72	37,089	0.70	1.56
BigIP	22,038	0.42	22,096	0.42	-0.30
openresty	14,811	0.28	14,881	0.28	-0.51
AkamaiGHost	13,158	0.25	12,562	0.24	4.70
lighttpd	8,848	0.17	8,963	0.17	-1.32
Tengine	8,016	0.15	7,732	0.15	3.63
Flywheel	7,948	0.15	7,614	0.14	4.35
IIS	7,176	0.14	7,456	0.14	-3.79
WWW	6,809	0.13	7,316	0.14	-6.97
squid	6,130	0.12	6,104	0.12	0.39
A	6,022	0.11	6,115	0.12	-1.56
wts	5,467	0.10	5,711	0.11	-4.31
Safedog	5,320	0.10	5,000	0.10	6.36
Lotus-Domino	5,283	0.10	5,376	0.10	-1.77
Varnish	4,415	0.08	4,386	0.08	0.62
Cowboy	3,899	0.07	3,861	0.07	0.95
AmazonS3	3,821	0.07	3,514	0.07	8.69
kangle	3,564	0.07	3,649	0.07	-2.37
CloudFront	3,548	0.07	2,922	0.06	21.38
sffe	3,169	0.06	3,171	0.06	-0.10
EZproxy	2,719	0.05	2,714	0.05	0.15
nginx-reuseport	2,091	0.04	1,986	0.04	5.25
Pantheon	1,918	0.04	1,801	0.03	6.46
Resin	1,878	0.04	1,940	0.04	-3.23
Destiny	1,739	0.03	1,734	0.03	0.25
IBM_HTTP_Server	1,712	0.03	1,799	0.03	-4.87
Zope	1,701	0.03	1,738	0.03	-2.17
YxlinkWAF	1,580	0.03	1,519	0.03	3.98
GSYQ	1,468	0.03	1,092	0.02	34.38
WDaemon	1,266	0.02	1,278	0.02	-0.98
-	1,262	0.02	1,236	0.02	2.06
IceWarp	1,158	0.02	1,146	0.02	1.01
GlassFish	1,151	0.02	1,141	0.02	0.84
Oracle-Application-Server-10g	1,109	0.02	1,134	0.02	-2.24
III	1,055	0.02	1,052	0.02	0.25
XtendWeb-nginx	1,029	0.02	922	0.02	11.56
xServers	986	0.02	975	0.02	1.09
ScreenConnect	915	0.02	902	0.02	1.40
Protected	875	0.02	821	0.02	6.54
ws-httpd	847	0.02	829	0.02	2.13
Rumpus	826	0.02	838	0.02	-1.47
CHO	782	0.01	794	0.02	-1.55
Bomgar	779	0.01	777	0.01	0.22
ATS	742	0.01	751	0.01	-1.24
Cougar	728	0.01	747	0.01	-2.58
Caddy	723	0.01	650	0.01	11.19
Web	720	0.01	764	0.01	-5.80
PWS	718	0.01	736	0.01	-2.48
Icecast	711	0.01	690	0.01	3.00
Oracle-Application-Server-11g	707	0.01	738	0.01	-4.24
nginx-upupw	681	0.01	626	0.01	8.74
GSHD	644	0.01	836	0.02	-23.00
WAF	631	0.01	752	0.01	-16.12
Server	611	0.01	594	0.01	2.82
*****************	566	0.01	550	0.01	2.87
thttpd	557	0.01	562	0.01	-0.93
Nginx	540	0.01	489	0.01	10.39
TWebAP	536	0.01	548	0.01	-2.23
WebServer	525	0.01	557	0.01	-5.78
EdgePrism	513	0.01	506	0.01	1.34
httpd	511	0.01	515	0.01	-0.82
CommuniGatePro	504	0.01	515	0.01	-2.17
redir-httpd	501	0.01	493	0.01	1.58
Oracle	494	0.01	515	0.01	-4.11
Boa	476	0.01	493	0.01	-3.49
yunjiasu-nginx	472	0.01	425	0.01	11.02
WowzaStreamingEngine	472	0.01	466	0.01	1.25
Sun	447	0.01	460	0.01	-2.86
VWebServer	434	0.01	425	0.01	2.08
1	410	0.01	418	0.01	-1.95
SonicWALL	401	0.01	417	0.01	-3.87
QRATOR	398	0.01	399	0.01	-0.29
Sun-ONE-Web-Server	396	0.01	416	0.01	-4.84
Pagely	395	0.01	386	0.01	2.29
Oracle-iPlanet-Web-Server	389	0.01	397	0.01	-2.05
Zeus	388	0.01	393	0.01	-1.31
cc-web	380	0.01	372	0.01	2.11
Footprint	367	0.01	348	0.01	5.42
Google	360	0.01	363	0.01	-0.86
WildFly	359	0.01	361	0.01	-0.59
Unknown	344	0.01	334	0.01	2.95
ghs	343	0.01	344	0.01	-0.33
360wzws	340	0.01	297	0.01	14.43
Cherokee	339	0.01	343	0.01	-1.20
Nginx-VPSSIM	331	0.01	354	0.01	-6.53
AliyunOSS	327	0.01	304	0.01	7.52
Abyss	327	0.01	332	0.01	-1.54
gunicorn	325	0.01	335	0.01	-3.02
Werkzeug	323	0.01	319	0.01	1.21
ECS	300	0.01	0	0.00	N/A
NginxPlus	297	0.01	0	0.00	N/A
LRBD-477c61c	287	0.01	332	0.01	-13.59

Note: Readers are cautioned that the Growth percentages are based on a server's market share penetration rather than the absolute number of servers we detected. Thus, it is possible for the number of servers to increase, while the growth is actually a negative value.