You are viewing an outdated report. The latest version of this report was published on January 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) 74,519,404 hostnames, but only 5,795,992 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	May 2015 Count	May 2015 %	April 2015 Count	April 2015 %	Growth %
Apache	3,045,614	52.55	3,068,337	52.64	-0.17
Microsoft-IIS	1,017,689	17.56	1,037,703	17.80	-1.36
nginx	593,768	10.24	578,849	9.93	3.17
null	492,120	8.49	503,127	8.63	-1.62
Microsoft-HTTPAPI	185,235	3.20	175,205	3.01	6.33
Apache-Coyote	62,410	1.08	62,781	1.08	-0.02
IdeaWebServer	56,857	0.98	56,661	0.97	0.92
cloudflare-nginx	54,527	0.94	49,873	0.86	9.96
LiteSpeed	33,701	0.58	33,062	0.57	2.52
IIS	24,261	0.42	32,098	0.55	-23.98
lighttpd	17,893	0.31	18,216	0.31	-1.21
BigIP	16,615	0.29	16,201	0.28	3.15
squid	10,498	0.18	10,712	0.18	-1.43
A	10,065	0.17	9,679	0.17	4.59
AkamaiGHost	8,676	0.15	8,940	0.15	-2.39
Rapidsite	7,903	0.14	8,054	0.14	-1.31
Lotus-Domino	7,635	0.13	7,732	0.13	-0.69
Tengine	5,488	0.09	4,990	0.09	10.61
Cowboy	4,961	0.09	4,803	0.08	3.88
sffe	4,900	0.08	5,022	0.09	-1.87
Safedog	4,827	0.08	5,558	0.10	-12.65
WWW	4,817	0.08	4,557	0.08	6.31
IBM_HTTP_Server	3,812	0.07	3,997	0.07	-4.08
Varnish	3,461	0.06	3,419	0.06	1.81
GSHD	3,011	0.05	3,299	0.06	-8.20
AmazonS3	2,667	0.05	2,727	0.05	-1.64
Resin	2,666	0.05	2,696	0.05	-0.54
kangle	2,645	0.05	2,563	0.04	3.79
Flywheel	2,554	0.04	2,353	0.04	9.17
EZproxy	2,535	0.04	2,542	0.04	0.30
Zope	2,507	0.04	2,547	0.04	-1.00
-	2,123	0.04	2,135	0.04	0.01
Oracle-Application-Server-10g	2,058	0.04	2,121	0.04	-2.41
openresty	1,795	0.03	1,747	0.03	3.34
CloudFront	1,657	0.03	1,645	0.03	1.31
WDaemon	1,635	0.03	1,662	0.03	-1.06
Web	1,460	0.03	1,458	0.03	0.71
xServers	1,313	0.02	1,301	0.02	1.50
IceWarp	1,304	0.02	1,320	0.02	-0.64
Cougar	1,295	0.02	1,345	0.02	-3.16
GlassFish	1,219	0.02	1,226	0.02	0.00
III	1,158	0.02	1,160	0.02	0.40
Oracle-Application-Server-11g	994	0.02	1,002	0.02	-0.23
Rumpus	972	0.02	1,001	0.02	-2.34
Sun-ONE-Web-Server	964	0.02	1,011	0.02	-4.10
cpsrvd	940	0.02	950	0.02	-0.48
Zeus	904	0.02	1,025	0.02	-11.30
thttpd	820	0.01	844	0.01	-2.28
Bomgar	812	0.01	835	0.01	-2.19
smartcds	802	0.01	822	0.01	-1.87
EdgePrism	778	0.01	762	0.01	2.69
Boa	749	0.01	778	0.01	-3.17
WebServer	747	0.01	748	0.01	0.44
Pantheon	736	0.01	695	0.01	6.51
httpd	699	0.01	681	0.01	3.23
Oracle	683	0.01	677	0.01	1.47
YxlinkWAF	680	0.01	532	0.01	28.56
*****************	669	0.01	584	0.01	15.21
Sun	667	0.01	668	0.01	0.43
CommuniGatePro	660	0.01	654	0.01	1.50
Demandware	633	0.01	662	0.01	-3.83
Netscape-Enterprise	613	0.01	635	0.01	-2.91
ScreenConnect	605	0.01	600	0.01	1.41
PWS	603	0.01	623	0.01	-2.65
Cherokee	599	0.01	607	0.01	-0.75
ATS	574	0.01	555	0.01	4.02
GWS	543	0.01	557	0.01	-1.95
redir-httpd	510	0.01	508	0.01	0.97
kisa	501	0.01	499	0.01	0.98
Oracle-iPlanet-Web-Server	496	0.01	484	0.01	3.07
Apache-AdvancedExtranetServer	479	0.01	499	0.01	-3.45
FlashCom	475	0.01	490	0.01	-2.50
SonicWALL	472	0.01	463	0.01	2.53
Sun-Java-System-Web-Server	460	0.01	494	0.01	-6.35
Jetty	450	0.01	456	0.01	-0.75
FC	442	0.01	533	0.01	-16.60
ngx_openresty	438	0.01	451	0.01	-2.32
TWebAP	432	0.01	409	0.01	6.23
WS	430	0.01	431	0.01	0.34
Server	428	0.01	411	0.01	4.74
Google	422	0.01	427	0.01	-0.60
Abyss	398	0.01	399	0.01	0.32
gunicorn	370	0.01	363	0.01	2.52
Unknown	370	0.01	366	0.01	1.68
NOYB	350	0.01	410	0.01	-14.14
WebServerX	348	0.01	345	0.01	1.45
SAP	346	0.01	350	0.01	-0.57
OpenCms	335	0.01	341	0.01	-1.19
AnWeb	333	0.01	339	0.01	-1.20
ghs	324	0.01	328	0.01	-0.65
Icecast	317	0.01	0	0.00	N/A
QRATOR	313	0.01	310	0.01	1.55
cc-web	301	0.01	297	0.01	1.93
HTTP	295	0.01	297	0.01	-0.10
Sucuri	292	0.01	0	0.00	N/A
WebtoB	287	0.00	301	0.01	-4.10
unknown	284	0.00	0	0.00	N/A
Footprint	283	0.00	0	0.00	N/A
WebSphere	281	0.00	0	0.00	N/A
yunjiasu-nginx	280	0.00	391	0.01	-27.98

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.