You are viewing an outdated report.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) 40,267,708 hostnames, but only 3,866,738 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	October 2009 Count	October 2009 %	September 2009 Count	September 2009 %	Growth %
Apache	2,254,105	58.29	2,235,292	58.27	0.05
Microsoft-IIS	979,702	25.34	977,629	25.48	-0.57
null	284,641	7.36	280,990	7.32	0.50
Rapidsite	55,954	1.45	56,004	1.46	-0.87
nginx	41,283	1.07	38,895	1.01	5.31
Apache-Coyote	32,833	0.85	32,138	0.84	1.36
IdeaWebServer	26,290	0.68	25,727	0.67	1.39
lighttpd	18,800	0.49	18,677	0.49	-0.13
A	17,746	0.46	17,577	0.46	0.17
Lotus-Domino	12,552	0.32	12,599	0.33	-1.16
Microsoft-HTTPAPI	11,775	0.30	10,668	0.28	9.51
IBM_HTTP_Server	6,215	0.16	6,194	0.16	-0.45
LiteSpeed	4,856	0.13	4,418	0.12	9.05
Zope	4,409	0.11	4,416	0.12	-0.94
Netscape-Enterprise	4,351	0.11	4,498	0.12	-4.03
squid	4,219	0.11	4,192	0.11	-0.15
Oracle-Application-Server-10g	3,971	0.10	3,935	0.10	0.12
Zeus	3,576	0.09	3,552	0.09	-0.11
Sun-ONE-Web-Server	3,521	0.09	3,558	0.09	-1.82
Resin	3,446	0.09	3,397	0.09	0.65
BigIP	3,251	0.08	3,148	0.08	2.46
AkamaiGHost	2,639	0.07	2,342	0.06	11.80
Cougar	2,312	0.06	2,268	0.06	1.14
Apache-AdvancedExtranetServer	2,275	0.06	2,376	0.06	-5.00
GWS	1,939	0.05	1,972	0.05	-2.45
NOYB	1,862	0.05	1,947	0.05	-5.12
WDaemon	1,602	0.04	1,601	0.04	-0.72
IceWarp	1,556	0.04	1,550	0.04	-0.40
WWW	1,463	0.04	1,450	0.04	0.10
Jetty	1,435	0.04	1,453	0.04	-2.01
WebServerX	1,322	0.03	1,329	0.03	-1.31
EZproxy	1,308	0.03	1,284	0.03	1.07
IBM_HTTP_SERVER	1,293	0.03	1,321	0.03	-2.89
Oracle	1,227	0.03	1,243	0.03	-2.06
Web	1,172	0.03	1,234	0.03	-5.77
Boa	1,154	0.03	1,167	0.03	-1.89
Ipswitch-IMail	1,132	0.03	1,141	0.03	-1.57
III	1,111	0.03	1,112	0.03	-0.87
thttpd	1,110	0.03	1,139	0.03	-3.31
WebServer	1,079	0.03	1,218	0.03	-12.11
PowerSchool	1,076	0.03	1,049	0.03	1.77
Sun-Java-System-Web-Server	1,043	0.03	1,011	0.03	2.36
WebLogic	998	0.03	1,026	0.03	-3.49
CommuniGatePro	952	0.02	957	0.02	-1.30
AnWeb	921	0.02	959	0.02	-4.72
WebSTAR	888	0.02	916	0.02	-3.82
httpd	842	0.02	840	0.02	-0.55
FileMakerPro	791	0.02	804	0.02	-2.39
cpsrvd	744	0.02	730	0.02	1.12
BIG-IP	727	0.02	753	0.02	-4.21
4D_WebStar_D	686	0.02	696	0.02	-2.21
ListManagerWeb	674	0.02	673	0.02	-0.64
apache	654	0.02	605	0.02	7.25
WebtoB	639	0.02	642	0.02	-1.25
HTTPD	611	0.02	543	0.01	11.64
WebSite	603	0.02	548	0.01	9.17
WebSitePro	584	0.02	625	0.02	-7.29
Sun	578	0.01	547	0.01	4.84
gws	566	0.01	502	0.01	11.86
AOLserver	565	0.01	571	0.01	-1.83
DeleGate	518	0.01	515	0.01	-0.21
redir-httpd	517	0.01	515	0.01	-0.40
Power	507	0.01	489	0.01	2.87
ThirdSphere	504	0.01	512	0.01	-2.34
4D_WebSTAR_S	501	0.01	516	0.01	-3.67
Secured	444	0.01	429	0.01	2.68
""	441	0.01	424	0.01	3.19
JRun	414	0.01	428	0.01	-4.03
Abyss	414	0.01	412	0.01	-0.30
Rumpus	413	0.01	391	0.01	4.80
SAMBAR	395	0.01	407	0.01	-3.71
WebSphere	383	0.01	379	0.01	0.26
Roxen	373	0.01	372	0.01	-0.52
Stronghold	364	0.01	364	0.01	-0.79
NetCache	344	0.01	355	0.01	-3.86
Server	335	0.01	322	0.01	3.22
ENIAC	334	0.01	331	0.01	0.11
Indy	316	0.01	312	0.01	0.49
Oracle9iAS	301	0.01	305	0.01	-2.09
Orion	300	0.01	305	0.01	-2.41
Ultraseek	291	0.01	295	0.01	-2.13
Powered	277	0.01	267	0.01	2.93
CoralWebPrx	276	0.01	236	0.01	16.03
IIS	275	0.01	279	0.01	-2.21
httpd+ssl	267	0.01	269	0.01	-1.52
JS	255	0.01	246	0.01	2.84
Xitami	241	0.01	236	0.01	1.32
OSU	241	0.01	239	0.01	0.05
EdgePrism	240	0.01	229	0.01	3.98
SAP	238	0.01	237	0.01	-0.37
Kerio	238	0.01	238	0.01	-0.79
NCSA	235	0.01	241	0.01	-3.26
Cherokee	228	0.01	202	0.01	11.99
NetWare-Enterprise-Web-Server	226	0.01	229	0.01	-2.08
SW	212	0.01	198	0.01	6.23
lighttpd-yt	208	0.01	238	0.01	-13.29
http	199	0.01	0	0.00	N/A
Hanbiro	199	0.01	198	0.01	-0.28
Polaris	193	0.00	194	0.01	-1.30
FJapache	191	0.00	0	0.00	N/A

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.