You are viewing an outdated report. The latest version of this report was published on April 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) 75,232,033 hostnames, but only 5,829,395 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 2015 Count	April 2015 %	March 2015 Count	March 2015 %	Growth %
Apache	3,068,337	52.64	3,074,778	52.75	-0.21
Microsoft-IIS	1,037,703	17.80	1,051,407	18.04	-1.30
nginx	578,849	9.93	565,982	9.71	2.27
null	503,127	8.63	501,159	8.60	0.39
Microsoft-HTTPAPI	175,205	3.01	172,614	2.96	1.50
Apache-Coyote	62,781	1.08	62,699	1.08	0.13
IdeaWebServer	56,661	0.97	56,571	0.97	0.16
cloudflare-nginx	49,873	0.86	44,053	0.76	13.21
LiteSpeed	33,062	0.57	32,851	0.56	0.64
IIS	32,098	0.55	36,380	0.62	-11.77
lighttpd	18,216	0.31	18,422	0.32	-1.12
BigIP	16,201	0.28	15,895	0.27	1.92
squid	10,712	0.18	11,053	0.19	-3.09
A	9,679	0.17	10,246	0.18	-5.53
AkamaiGHost	8,940	0.15	8,803	0.15	1.56
Rapidsite	8,054	0.14	8,227	0.14	-2.10
Lotus-Domino	7,732	0.13	7,868	0.13	-1.73
Safedog	5,558	0.10	5,086	0.09	9.28
sffe	5,022	0.09	5,153	0.09	-2.54
Tengine	4,990	0.09	5,324	0.09	-6.27
Cowboy	4,803	0.08	4,730	0.08	1.54
WWW	4,557	0.08	4,631	0.08	-1.60
IBM_HTTP_Server	3,997	0.07	4,134	0.07	-3.31
Varnish	3,419	0.06	3,282	0.06	4.17
GSHD	3,299	0.06	2,108	0.04	56.50
AmazonS3	2,727	0.05	2,530	0.04	7.79
Resin	2,696	0.05	2,725	0.05	-1.07
kangle	2,563	0.04	2,598	0.04	-1.35
Zope	2,547	0.04	2,569	0.04	-0.86
EZproxy	2,542	0.04	2,521	0.04	0.83
Flywheel	2,353	0.04	2,185	0.04	7.69
-	2,135	0.04	2,106	0.04	1.38
Oracle-Application-Server-10g	2,121	0.04	2,192	0.04	-3.24
openresty	1,747	0.03	1,652	0.03	5.75
WDaemon	1,662	0.03	1,677	0.03	-0.90
CloudFront	1,645	0.03	1,647	0.03	-0.12
Web	1,458	0.03	1,504	0.03	-3.06
Cougar	1,345	0.02	1,385	0.02	-2.89
IceWarp	1,320	0.02	1,333	0.02	-0.98
xServers	1,301	0.02	1,274	0.02	2.12
GlassFish	1,226	0.02	1,219	0.02	0.57
III	1,160	0.02	1,165	0.02	-0.43
Zeus	1,025	0.02	1,071	0.02	-4.30
Sun-ONE-Web-Server	1,011	0.02	1,022	0.02	-1.08
Oracle-Application-Server-11g	1,002	0.02	982	0.02	2.04
Rumpus	1,001	0.02	999	0.02	0.20
cpsrvd	950	0.02	945	0.02	0.53
thttpd	844	0.01	858	0.01	-1.63
Bomgar	835	0.01	845	0.01	-1.18
smartcds	822	0.01	756	0.01	8.73
Boa	778	0.01	773	0.01	0.65
EdgePrism	762	0.01	730	0.01	4.38
WebServer	748	0.01	742	0.01	0.81
Pantheon	695	0.01	646	0.01	7.58
httpd	681	0.01	698	0.01	-2.44
Oracle	677	0.01	687	0.01	-1.46
Sun	668	0.01	676	0.01	-1.18
Demandware	662	0.01	663	0.01	-0.15
CommuniGatePro	654	0.01	670	0.01	-2.39
Netscape-Enterprise	635	0.01	615	0.01	3.25
PWS	623	0.01	600	0.01	3.83
Cherokee	607	0.01	625	0.01	-2.88
ScreenConnect	600	0.01	567	0.01	5.82
*****************	584	0.01	614	0.01	-4.89
GWS	557	0.01	588	0.01	-5.27
ATS	555	0.01	555	0.01	-0.00
FC	533	0.01	723	0.01	-26.28
YxlinkWAF	532	0.01	433	0.01	22.86
redir-httpd	508	0.01	509	0.01	-0.20
kisa	499	0.01	495	0.01	0.81
Apache-AdvancedExtranetServer	499	0.01	511	0.01	-2.35
Sun-Java-System-Web-Server	494	0.01	526	0.01	-6.08
FlashCom	490	0.01	503	0.01	-2.59
Oracle-iPlanet-Web-Server	484	0.01	486	0.01	-0.41
SonicWALL	463	0.01	445	0.01	4.04
Jetty	456	0.01	480	0.01	-5.00
ngx_openresty	451	0.01	448	0.01	0.67
WS	431	0.01	399	0.01	8.02
Google	427	0.01	420	0.01	1.67
Kucci	420	0.01	446	0.01	-5.83
Server	411	0.01	420	0.01	-2.14
NOYB	410	0.01	419	0.01	-2.15
TWebAP	409	0.01	431	0.01	-5.11
Abyss	399	0.01	404	0.01	-1.24
yunjiasu-nginx	391	0.01	352	0.01	11.08
Unknown	366	0.01	356	0.01	2.81
gunicorn	363	0.01	364	0.01	-0.28
SAP	350	0.01	354	0.01	-1.13
WebServerX	345	0.01	338	0.01	2.07
OpenCms	341	0.01	331	0.01	3.02
AnWeb	339	0.01	352	0.01	-3.69
ghs	328	0.01	311	0.01	5.47
Protected	325	0.01	0	0.00	N/A
ASERVER	319	0.01	306	0.01	4.25
NetBox	311	0.01	321	0.01	-3.12
QRATOR	310	0.01	319	0.01	-2.82
WebtoB	301	0.01	316	0.01	-4.75
cc-web	297	0.01	0	0.00	N/A
HTTP	297	0.01	0	0.00	N/A
ODERLAND	296	0.01	292	0.01	1.37

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.