You are viewing an outdated report.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) 41,064,132 hostnames, but only 3,905,235 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	December 2009 Count	December 2009 %	November 2009 Count	November 2009 %	Growth %
Apache	2,283,884	58.48	2,264,704	58.29	0.32
Microsoft-IIS	973,548	24.93	980,486	25.24	-1.22
null	291,723	7.47	287,920	7.41	0.79
Rapidsite	55,580	1.42	55,792	1.44	-0.90
nginx	46,953	1.20	44,287	1.14	5.47
Apache-Coyote	33,683	0.86	33,405	0.86	0.31
IdeaWebServer	27,192	0.70	26,624	0.69	1.60
lighttpd	18,316	0.47	18,166	0.47	0.30
A	17,766	0.45	17,762	0.46	-0.50
Microsoft-HTTPAPI	14,094	0.36	12,997	0.33	7.88
Lotus-Domino	12,368	0.32	12,430	0.32	-1.02
IBM_HTTP_Server	6,285	0.16	6,247	0.16	0.09
LiteSpeed	5,361	0.14	5,107	0.13	4.43
Zope	4,367	0.11	4,405	0.11	-1.38
squid	4,135	0.11	4,230	0.11	-2.75
Netscape-Enterprise	4,058	0.10	4,154	0.11	-2.82
Oracle-Application-Server-10g	3,957	0.10	3,977	0.10	-1.02
BigIP	3,592	0.09	3,467	0.09	3.07
Sun-ONE-Web-Server	3,451	0.09	3,490	0.09	-1.63
Resin	3,406	0.09	3,405	0.09	-0.49
Zeus	3,360	0.09	3,478	0.09	-3.89
AkamaiGHost	2,803	0.07	2,427	0.06	14.89
Cougar	2,356	0.06	2,354	0.06	-0.43
Apache-AdvancedExtranetServer	2,144	0.05	2,194	0.06	-2.79
GWS	1,897	0.05	1,926	0.05	-2.02
WDaemon	1,594	0.04	1,591	0.04	-0.33
NOYB	1,587	0.04	1,654	0.04	-4.55
IceWarp	1,573	0.04	1,561	0.04	0.25
WebServerX	1,428	0.04	1,374	0.04	3.39
Jetty	1,413	0.04	1,412	0.04	-0.45
WWW	1,407	0.04	1,451	0.04	-3.54
EZproxy	1,363	0.03	1,340	0.03	1.19
Web	1,281	0.03	1,237	0.03	3.02
Oracle	1,228	0.03	1,239	0.03	-1.40
IBM_HTTP_SERVER	1,224	0.03	1,261	0.03	-3.44
PowerSchool	1,143	0.03	1,123	0.03	1.25
Boa	1,142	0.03	1,173	0.03	-3.15
III	1,129	0.03	1,118	0.03	0.46
thttpd	1,098	0.03	1,081	0.03	1.05
Sun-Java-System-Web-Server	1,075	0.03	1,050	0.03	1.85
Ipswitch-IMail	1,042	0.03	1,093	0.03	-5.16
WebLogic	957	0.02	993	0.03	-4.13
CommuniGatePro	949	0.02	960	0.02	-1.66
AnWeb	922	0.02	894	0.02	2.60
WebSTAR	842	0.02	853	0.02	-1.80
httpd	827	0.02	836	0.02	-1.59
FileMakerPro	768	0.02	784	0.02	-2.55
cpsrvd	763	0.02	742	0.02	2.30
apache	729	0.02	695	0.02	4.35
4D_WebStar_D	697	0.02	699	0.02	-0.80
BIG-IP	688	0.02	712	0.02	-3.87
ListManagerWeb	683	0.02	675	0.02	0.66
HTTPD	659	0.02	633	0.02	3.57
WebtoB	650	0.02	657	0.02	-1.58
WebServer	643	0.02	830	0.02	-22.93
Sun	617	0.02	593	0.02	3.51
WebSite	593	0.02	597	0.02	-1.19
gws	572	0.01	562	0.01	1.25
WebSitePro	562	0.01	574	0.01	-2.60
AOLserver	545	0.01	554	0.01	-2.14
DeleGate	526	0.01	521	0.01	0.44
redir-httpd	516	0.01	516	0.01	-0.52
ThirdSphere	489	0.01	500	0.01	-2.71
4D_WebSTAR_S	482	0.01	496	0.01	-3.33
Power	467	0.01	504	0.01	-7.82
Rumpus	442	0.01	426	0.01	3.22
""	441	0.01	445	0.01	-1.41
JRun	435	0.01	417	0.01	3.78
Abyss	417	0.01	408	0.01	1.68
Secured	394	0.01	385	0.01	1.81
SAMBAR	387	0.01	396	0.01	-2.78
WebSphere	367	0.01	386	0.01	-5.42
Roxen	358	0.01	364	0.01	-2.16
Stronghold	354	0.01	362	0.01	-2.72
Server	350	0.01	350	0.01	-0.52
NetCache	329	0.01	336	0.01	-2.59
ENIAC	325	0.01	320	0.01	1.04
Indy	314	0.01	318	0.01	-1.77
Orion	292	0.01	292	0.01	-0.52
IIS	282	0.01	285	0.01	-1.57
Ultraseek	281	0.01	290	0.01	-3.61
Cherokee	278	0.01	248	0.01	11.51
Oracle9iAS	276	0.01	283	0.01	-2.98
JS	273	0.01	259	0.01	4.86
CoralWebPrx	270	0.01	234	0.01	14.79
httpd+ssl	250	0.01	261	0.01	-4.71
SAP	245	0.01	238	0.01	2.41
EdgePrism	244	0.01	246	0.01	-1.33
Bomgar	243	0.01	227	0.01	6.49
Kerio	242	0.01	238	0.01	1.15
Xitami	240	0.01	239	0.01	-0.10
NCSA	225	0.01	221	0.01	1.28
OSU	223	0.01	240	0.01	-7.57
CloudFront	206	0.01	197	0.01	4.03
NetWare-Enterprise-Web-Server	203	0.01	210	0.01	-3.84
Hanbiro	201	0.01	200	0.01	-0.02
SW	200	0.01	211	0.01	-5.71
FJapache	192	0.00	0	0.00	N/A
Varnish	191	0.00	0	0.00	N/A
Polaris	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.