You are viewing an outdated report.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) 41,838,862 hostnames, but only 3,931,264 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	January 2010 Count	January 2010 %	December 2009 Count	December 2009 %	Growth %
Apache	2,300,952	58.53	2,283,884	58.48	0.08
Microsoft-IIS	972,173	24.73	973,548	24.93	-0.80
null	296,554	7.54	291,723	7.47	0.98
Rapidsite	55,245	1.41	55,580	1.42	-1.26
nginx	49,884	1.27	46,953	1.20	5.54
Apache-Coyote	34,148	0.87	33,683	0.86	0.71
IdeaWebServer	27,672	0.70	27,192	0.70	1.09
lighttpd	18,503	0.47	18,316	0.47	0.35
A	17,830	0.45	17,766	0.45	-0.30
Microsoft-HTTPAPI	15,322	0.39	14,094	0.36	7.99
Lotus-Domino	12,312	0.31	12,368	0.32	-1.11
IBM_HTTP_Server	6,307	0.16	6,285	0.16	-0.31
LiteSpeed	5,786	0.15	5,361	0.14	7.21
Zope	4,372	0.11	4,367	0.11	-0.55
squid	4,188	0.11	4,135	0.11	0.61
Oracle-Application-Server-10g	4,000	0.10	3,957	0.10	0.42
Netscape-Enterprise	3,887	0.10	4,058	0.10	-4.85
BigIP	3,690	0.09	3,592	0.09	2.05
Sun-ONE-Web-Server	3,441	0.09	3,451	0.09	-0.95
Resin	3,396	0.09	3,406	0.09	-0.95
Zeus	3,321	0.08	3,360	0.09	-1.82
AkamaiGHost	2,565	0.07	2,803	0.07	-9.10
Cougar	2,333	0.06	2,356	0.06	-1.63
Apache-AdvancedExtranetServer	2,091	0.05	2,144	0.05	-3.12
GWS	1,868	0.05	1,897	0.05	-2.18
WDaemon	1,590	0.04	1,594	0.04	-0.91
IceWarp	1,555	0.04	1,573	0.04	-1.80
NOYB	1,554	0.04	1,587	0.04	-2.73
WebServerX	1,448	0.04	1,428	0.04	0.73
Jetty	1,406	0.04	1,413	0.04	-1.15
WWW	1,391	0.04	1,407	0.04	-1.79
EZproxy	1,372	0.03	1,363	0.03	-0.01
Web	1,250	0.03	1,281	0.03	-3.07
Oracle	1,209	0.03	1,228	0.03	-2.20
IBM_HTTP_SERVER	1,208	0.03	1,224	0.03	-1.96
PowerSchool	1,169	0.03	1,143	0.03	1.60
Boa	1,133	0.03	1,142	0.03	-1.44
III	1,129	0.03	1,129	0.03	-0.66
thttpd	1,105	0.03	1,098	0.03	-0.03
Sun-Java-System-Web-Server	1,090	0.03	1,075	0.03	0.72
Ipswitch-IMail	1,022	0.03	1,042	0.03	-2.57
CommuniGatePro	963	0.02	949	0.02	0.80
WebLogic	942	0.02	957	0.02	-2.22
AnWeb	918	0.02	922	0.02	-1.09
httpd	821	0.02	827	0.02	-1.38
WebSTAR	821	0.02	842	0.02	-3.14
cpsrvd	760	0.02	763	0.02	-1.05
FileMakerPro	760	0.02	768	0.02	-1.70
HTTPD	744	0.02	659	0.02	12.15
apache	729	0.02	729	0.02	-0.66
ListManagerWeb	698	0.02	683	0.02	1.52
BIG-IP	695	0.02	688	0.02	0.35
4D_WebStar_D	687	0.02	697	0.02	-2.09
WebtoB	649	0.02	650	0.02	-0.81
Sun	643	0.02	617	0.02	3.52
WebServer	602	0.02	643	0.02	-7.00
gws	585	0.01	572	0.01	1.60
WebSite	576	0.01	593	0.02	-3.51
AOLserver	537	0.01	545	0.01	-2.12
WebSitePro	534	0.01	562	0.01	-5.61
Windows	529	0.01	0	0.00	N/A
DeleGate	520	0.01	526	0.01	-1.80
redir-httpd	515	0.01	516	0.01	-0.85
ThirdSphere	479	0.01	489	0.01	-2.69
4D_WebSTAR_S	468	0.01	482	0.01	-3.55
Power	460	0.01	467	0.01	-2.15
Rumpus	447	0.01	442	0.01	0.46
JRun	431	0.01	435	0.01	-1.58
Secured	425	0.01	394	0.01	7.15
Abyss	415	0.01	417	0.01	-1.14
SAMBAR	385	0.01	387	0.01	-1.18
""	378	0.01	441	0.01	-14.85
WebSphere	377	0.01	367	0.01	2.04
Roxen	366	0.01	358	0.01	1.56
Server	363	0.01	350	0.01	3.03
Stronghold	341	0.01	354	0.01	-4.31
Indy	327	0.01	314	0.01	3.45
ENIAC	319	0.01	325	0.01	-2.50
NetCache	318	0.01	329	0.01	-3.98
Cherokee	305	0.01	278	0.01	8.99
Orion	291	0.01	292	0.01	-1.00
Ultraseek	280	0.01	281	0.01	-1.02
CoralWebPrx	280	0.01	270	0.01	3.02
Oracle9iAS	270	0.01	276	0.01	-2.82
IIS	268	0.01	282	0.01	-5.59
Bomgar	264	0.01	243	0.01	7.92
SAP	255	0.01	245	0.01	3.39
JS	248	0.01	273	0.01	-9.76
httpd+ssl	244	0.01	250	0.01	-3.05
Kerio	240	0.01	242	0.01	-1.48
EdgePrism	239	0.01	244	0.01	-2.70
Xitami	231	0.01	240	0.01	-4.39
OSU	228	0.01	223	0.01	1.57
NCSA	220	0.01	225	0.01	-2.87
Varnish	218	0.01	191	0.00	13.38
SW	215	0.01	200	0.01	6.79
CloudFront	213	0.01	206	0.01	2.71
Hanbiro	205	0.01	201	0.01	1.31
FC	201	0.01	0	0.00	N/A
NetWare-Enterprise-Web-Server	199	0.01	203	0.01	-2.62

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.