You are viewing an outdated report.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) 75,788,254 hostnames, but only 5,772,320 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	September 2015 Count	September 2015 %	August 2015 Count	August 2015 %	Growth %
Apache	3,034,462	52.57	3,032,291	52.43	0.26
Microsoft-IIS	965,193	16.72	980,402	16.95	-1.36
nginx	644,066	11.16	634,414	10.97	1.72
null	459,539	7.96	470,704	8.14	-2.18
Microsoft-HTTPAPI	193,935	3.36	195,557	3.38	-0.64
cloudflare-nginx	62,813	1.09	62,085	1.07	1.37
Apache-Coyote	62,812	1.09	62,978	1.09	-0.07
IdeaWebServer	56,871	0.99	56,721	0.98	0.46
LiteSpeed	37,042	0.64	35,784	0.62	3.71
IIS	20,723	0.36	17,632	0.30	17.76
BigIP	18,461	0.32	18,149	0.31	1.91
lighttpd	15,830	0.27	16,587	0.29	-4.38
squid	10,656	0.18	10,599	0.18	0.73
AkamaiGHost	10,068	0.17	9,661	0.17	4.41
A	9,695	0.17	9,771	0.17	-0.59
Rapidsite	7,380	0.13	7,508	0.13	-1.52
Lotus-Domino	7,209	0.12	7,310	0.13	-1.19
Tengine	6,163	0.11	5,951	0.10	3.76
WWW	5,212	0.09	5,223	0.09	-0.02
Cowboy	5,150	0.09	5,021	0.09	2.77
sffe	4,626	0.08	4,643	0.08	-0.17
Safedog	4,481	0.08	4,776	0.08	-6.00
GSHD	4,322	0.07	4,531	0.08	-4.43
Varnish	3,669	0.06	3,577	0.06	2.77
Flywheel	3,346	0.06	3,130	0.05	7.11
IBM_HTTP_Server	3,311	0.06	3,522	0.06	-5.81
AmazonS3	3,078	0.05	2,829	0.05	9.01
kangle	2,705	0.05	3,164	0.05	-14.34
Resin	2,610	0.05	2,626	0.05	-0.42
EZproxy	2,592	0.04	2,579	0.04	0.70
Zope	2,395	0.04	2,433	0.04	-1.37
-	2,313	0.04	2,210	0.04	4.86
openresty	2,160	0.04	2,000	0.03	8.21
Oracle-Application-Server-10g	1,877	0.03	1,935	0.03	-2.81
CloudFront	1,652	0.03	1,642	0.03	0.80
WDaemon	1,605	0.03	1,827	0.03	-11.98
Web	1,455	0.03	1,472	0.03	-0.96
IceWarp	1,297	0.02	1,296	0.02	0.27
GlassFish	1,260	0.02	1,253	0.02	0.75
III	1,147	0.02	1,149	0.02	0.02
Cougar	1,136	0.02	1,145	0.02	-0.60
XiakeWeb	1,088	0.02	397	0.01	174.58
Oracle-Application-Server-11g	981	0.02	984	0.02	-0.11
xServers	961	0.02	1,329	0.02	-27.55
Rumpus	959	0.02	969	0.02	-0.84
cpsrvd	941	0.02	943	0.02	-0.02
smartcds	919	0.02	815	0.01	12.98
Pantheon	883	0.02	838	0.01	5.57
Sun-ONE-Web-Server	871	0.02	891	0.02	-2.06
YxlinkWAF	849	0.01	858	0.01	-0.86
Bomgar	819	0.01	817	0.01	0.44
thttpd	789	0.01	790	0.01	0.07
Zeus	783	0.01	802	0.01	-2.18
WebServer	736	0.01	729	0.01	1.15
ScreenConnect	714	0.01	691	0.01	3.53
Advanced	708	0.01	759	0.01	-6.54
Boa	702	0.01	726	0.01	-3.12
PWS	701	0.01	699	0.01	0.48
httpd	679	0.01	685	0.01	-0.69
Demandware	673	0.01	667	0.01	1.09
ATS	652	0.01	599	0.01	9.06
Oracle	651	0.01	660	0.01	-1.17
EdgePrism	633	0.01	656	0.01	-3.32
CommuniGatePro	628	0.01	633	0.01	-0.60
Sun	614	0.01	608	0.01	1.18
*****************	608	0.01	675	0.01	-9.75
Cherokee	583	0.01	584	0.01	0.02
GSYQ	562	0.01	0	0.00	N/A
redir-httpd	508	0.01	514	0.01	-0.98
kisa	503	0.01	505	0.01	-0.20
Oracle-iPlanet-Web-Server	498	0.01	496	0.01	0.60
Netscape-Enterprise	493	0.01	512	0.01	-3.53
GWS	487	0.01	510	0.01	-4.33
SonicWALL	483	0.01	488	0.01	-0.83
TWebAP	480	0.01	432	0.01	11.33
Server	453	0.01	453	0.01	0.19
Apache-AdvancedExtranetServer	445	0.01	447	0.01	-0.26
FlashCom	431	0.01	435	0.01	-0.73
Google	419	0.01	417	0.01	0.67
Icecast	418	0.01	389	0.01	7.66
Sun-Java-System-Web-Server	401	0.01	428	0.01	-6.13
Jetty	400	0.01	417	0.01	-3.89
Unknown	395	0.01	379	0.01	4.42
WS	392	0.01	402	0.01	-2.30
ngx_openresty	390	0.01	415	0.01	-5.84
gunicorn	383	0.01	378	0.01	1.52
Abyss	380	0.01	380	0.01	0.19
WowzaStreamingEngine	369	0.01	350	0.01	5.63
SAP	342	0.01	338	0.01	1.38
yunjiasu-nginx	335	0.01	343	0.01	-2.14
ghs	332	0.01	325	0.01	2.35
QRATOR	332	0.01	330	0.01	0.80
WebServerX	331	0.01	332	0.01	-0.11
OpenCms	325	0.01	326	0.01	-0.11
Nginx-VPSSIM	323	0.01	0	0.00	N/A
cc-web	316	0.01	317	0.01	-0.12
NOYB	304	0.01	306	0.01	-0.46
FC	300	0.01	339	0.01	-11.33
unknown	298	0.01	293	0.01	1.90
HTTP	298	0.01	292	0.01	2.25

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.