You are viewing an outdated report.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) 40,891,735 hostnames, but only 3,884,965 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	November 2009 Count	November 2009 %	October 2009 Count	October 2009 %	Growth %
Apache	2,264,704	58.29	2,254,105	58.29	-0.00
Microsoft-IIS	980,486	25.24	979,702	25.34	-0.39
null	287,920	7.41	284,641	7.36	0.68
Rapidsite	55,792	1.44	55,954	1.45	-0.76
nginx	44,287	1.14	41,283	1.07	6.77
Apache-Coyote	33,405	0.86	32,833	0.85	1.26
IdeaWebServer	26,624	0.69	26,290	0.68	0.80
lighttpd	18,166	0.47	18,800	0.49	-3.83
A	17,762	0.46	17,746	0.46	-0.38
Microsoft-HTTPAPI	12,997	0.33	11,775	0.30	9.86
Lotus-Domino	12,430	0.32	12,552	0.32	-1.44
IBM_HTTP_Server	6,247	0.16	6,215	0.16	0.04
LiteSpeed	5,107	0.13	4,856	0.13	4.68
Zope	4,405	0.11	4,409	0.11	-0.56
squid	4,230	0.11	4,219	0.11	-0.21
Netscape-Enterprise	4,154	0.11	4,351	0.11	-4.98
Oracle-Application-Server-10g	3,977	0.10	3,971	0.10	-0.32
Sun-ONE-Web-Server	3,490	0.09	3,521	0.09	-1.35
Zeus	3,478	0.09	3,576	0.09	-3.20
BigIP	3,467	0.09	3,251	0.08	6.14
Resin	3,405	0.09	3,446	0.09	-1.65
AkamaiGHost	2,427	0.06	2,639	0.07	-8.46
Cougar	2,354	0.06	2,312	0.06	1.34
Apache-AdvancedExtranetServer	2,194	0.06	2,275	0.06	-4.01
GWS	1,926	0.05	1,939	0.05	-1.14
NOYB	1,654	0.04	1,862	0.05	-11.59
WDaemon	1,591	0.04	1,602	0.04	-1.15
IceWarp	1,561	0.04	1,556	0.04	-0.15
WWW	1,451	0.04	1,463	0.04	-1.29
Jetty	1,412	0.04	1,435	0.04	-2.06
WebServerX	1,374	0.04	1,322	0.03	3.45
EZproxy	1,340	0.03	1,308	0.03	1.97
IBM_HTTP_SERVER	1,261	0.03	1,293	0.03	-2.93
Oracle	1,239	0.03	1,227	0.03	0.50
Web	1,237	0.03	1,172	0.03	5.05
Boa	1,173	0.03	1,154	0.03	1.17
PowerSchool	1,123	0.03	1,076	0.03	3.88
III	1,118	0.03	1,111	0.03	0.16
Ipswitch-IMail	1,093	0.03	1,132	0.03	-3.90
thttpd	1,081	0.03	1,110	0.03	-3.07
Sun-Java-System-Web-Server	1,050	0.03	1,043	0.03	0.20
WebLogic	993	0.03	998	0.03	-0.97
CommuniGatePro	960	0.02	952	0.02	0.37
AnWeb	894	0.02	921	0.02	-3.39
WebSTAR	853	0.02	888	0.02	-4.39
httpd	836	0.02	842	0.02	-1.18
WebServer	830	0.02	1,079	0.03	-23.44
FileMakerPro	784	0.02	791	0.02	-1.35
cpsrvd	742	0.02	744	0.02	-0.74
BIG-IP	712	0.02	727	0.02	-2.52
4D_WebStar_D	699	0.02	686	0.02	1.42
apache	695	0.02	654	0.02	5.77
ListManagerWeb	675	0.02	674	0.02	-0.32
WebtoB	657	0.02	639	0.02	2.33
HTTPD	633	0.02	611	0.02	3.11
WebSite	597	0.02	603	0.02	-1.46
Sun	593	0.02	578	0.01	2.11
WebSitePro	574	0.01	584	0.02	-2.17
gws	562	0.01	566	0.01	-1.17
AOLserver	554	0.01	565	0.01	-2.41
DeleGate	521	0.01	518	0.01	0.11
redir-httpd	516	0.01	517	0.01	-0.66
Power	504	0.01	507	0.01	-1.06
ThirdSphere	500	0.01	504	0.01	-1.26
4D_WebSTAR_S	496	0.01	501	0.01	-1.46
""	445	0.01	441	0.01	0.43
Rumpus	426	0.01	413	0.01	2.66
JRun	417	0.01	414	0.01	0.25
Abyss	408	0.01	414	0.01	-1.91
SAMBAR	396	0.01	395	0.01	-0.22
WebSphere	386	0.01	383	0.01	0.31
Secured	385	0.01	444	0.01	-13.70
Roxen	364	0.01	373	0.01	-2.87
Stronghold	362	0.01	364	0.01	-1.02
Server	350	0.01	335	0.01	3.99
NetCache	336	0.01	344	0.01	-2.78
ENIAC	320	0.01	334	0.01	-4.64
Indy	318	0.01	316	0.01	0.16
Orion	292	0.01	300	0.01	-3.12
Ultraseek	290	0.01	291	0.01	-0.81
IIS	285	0.01	275	0.01	3.15
Oracle9iAS	283	0.01	301	0.01	-6.42
httpd+ssl	261	0.01	267	0.01	-2.71
JS	259	0.01	255	0.01	1.09
Cherokee	248	0.01	228	0.01	8.26
EdgePrism	246	0.01	240	0.01	2.02
OSU	240	0.01	241	0.01	-0.88
Xitami	239	0.01	241	0.01	-1.30
SAP	238	0.01	238	0.01	-0.47
Kerio	238	0.01	238	0.01	-0.47
CoralWebPrx	234	0.01	276	0.01	-15.62
Bomgar	227	0.01	0	0.00	N/A
NCSA	221	0.01	235	0.01	-6.40
SW	211	0.01	212	0.01	-0.94
NetWare-Enterprise-Web-Server	210	0.01	226	0.01	-7.52
lighttpd-yt	206	0.01	208	0.01	-1.43
Hanbiro	200	0.01	199	0.01	0.03
CloudFront	197	0.01	0	0.00	N/A
SegPache	189	0.00	0	0.00	N/A
Jeus	189	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.