You are viewing an outdated report.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) 45,335,167 hostnames, but only 4,071,660 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	May 2010 Count	May 2010 %	April 2010 Count	April 2010 %	Growth %
Apache	2,388,831	58.67	2,353,369	58.63	0.06
Microsoft-IIS	986,297	24.22	976,820	24.34	-0.47
null	307,520	7.55	303,426	7.56	-0.10
nginx	64,878	1.59	60,073	1.50	6.46
Rapidsite	53,323	1.31	53,676	1.34	-2.07
Apache-Coyote	36,887	0.91	36,003	0.90	0.99
IdeaWebServer	29,648	0.73	29,168	0.73	0.20
Microsoft-HTTPAPI	21,561	0.53	19,975	0.50	6.40
lighttpd	19,294	0.47	18,996	0.47	0.12
A	17,610	0.43	17,685	0.44	-1.84
Lotus-Domino	12,130	0.30	12,095	0.30	-1.14
LiteSpeed	7,846	0.19	7,448	0.19	3.84
IBM_HTTP_Server	6,418	0.16	6,369	0.16	-0.67
squid	4,416	0.11	4,390	0.11	-0.84
BigIP	4,316	0.11	4,185	0.10	1.66
Zope	4,302	0.11	4,281	0.11	-0.94
Oracle-Application-Server-10g	4,047	0.10	4,026	0.10	-0.91
Netscape-Enterprise	3,446	0.08	3,541	0.09	-4.07
Resin	3,417	0.08	3,382	0.08	-0.41
Sun-ONE-Web-Server	3,222	0.08	3,249	0.08	-2.24
Zeus	3,141	0.08	3,216	0.08	-3.72
Cougar	2,392	0.06	2,356	0.06	0.08
AkamaiGHost	2,103	0.05	2,586	0.06	-19.84
Apache-AdvancedExtranetServer	1,856	0.05	1,900	0.05	-3.71
GWS	1,780	0.04	1,795	0.04	-2.25
WDaemon	1,635	0.04	1,615	0.04	-0.20
IceWarp	1,572	0.04	1,553	0.04	-0.22
WebServerX	1,544	0.04	1,492	0.04	2.01
EZproxy	1,446	0.04	1,435	0.04	-0.67
NOYB	1,367	0.03	1,379	0.03	-2.28
Jetty	1,345	0.03	1,349	0.03	-1.72
PowerSchool	1,297	0.03	1,270	0.03	0.67
WWW	1,222	0.03	1,268	0.03	-5.00
Sun-Java-System-Web-Server	1,188	0.03	1,167	0.03	0.35
Web	1,164	0.03	1,135	0.03	1.09
Oracle	1,159	0.03	1,174	0.03	-2.68
III	1,141	0.03	1,140	0.03	-1.34
Boa	1,135	0.03	1,123	0.03	-0.37
apache	1,125	0.03	938	0.02	18.23
thttpd	1,093	0.03	1,075	0.03	0.23
IBM_HTTP_SERVER	1,058	0.03	1,089	0.03	-4.23
HTTPD	971	0.02	920	0.02	4.04
Ipswitch-IMail	964	0.02	970	0.02	-2.04
CommuniGatePro	944	0.02	942	0.02	-1.22
AnWeb	935	0.02	855	0.02	7.80
httpd	836	0.02	830	0.02	-0.71
cpsrvd	810	0.02	799	0.02	-0.07
WebSTAR	770	0.02	778	0.02	-2.44
WebLogic	762	0.02	811	0.02	-7.38
ListManagerWeb	710	0.02	703	0.02	-0.44
FileMakerPro	707	0.02	723	0.02	-3.61
Sun	700	0.02	672	0.02	2.68
4D_WebStar_D	681	0.02	670	0.02	0.19
sffe	658	0.02	691	0.02	-6.13
WebtoB	639	0.02	639	0.02	-1.43
BIG-IP	584	0.01	593	0.01	-2.92
WebSite	548	0.01	546	0.01	-1.06
Windows	527	0.01	545	0.01	-4.68
AOLserver	518	0.01	529	0.01	-3.48
redir-httpd	514	0.01	514	0.01	-1.43
Rumpus	503	0.01	482	0.01	2.87
DeleGate	486	0.01	490	0.01	-2.23
Cherokee	479	0.01	428	0.01	10.32
WebSitePro	476	0.01	483	0.01	-2.85
Secured	459	0.01	446	0.01	1.45
JRun	438	0.01	432	0.01	-0.06
TimmiT	435	0.01	384	0.01	11.67
4D_WebSTAR_S	434	0.01	444	0.01	-3.65
Abyss	432	0.01	417	0.01	2.12
WebServer	393	0.01	397	0.01	-2.42
EdgePrism	387	0.01	392	0.01	-2.68
Power	385	0.01	408	0.01	-6.98
WebSphere	377	0.01	367	0.01	1.26
Roxen	357	0.01	356	0.01	-1.15
""	357	0.01	347	0.01	1.42
ThirdSphere	354	0.01	325	0.01	7.37
SAMBAR	350	0.01	350	0.01	-1.43
Server	341	0.01	357	0.01	-5.84
Bomgar	341	0.01	316	0.01	6.37
Indy	320	0.01	332	0.01	-4.99
Stronghold	316	0.01	332	0.01	-6.18
NetCache	310	0.01	315	0.01	-2.99
Varnish	309	0.01	300	0.01	1.53
ENIAC	291	0.01	306	0.01	-6.26
Orion	286	0.01	285	0.01	-1.08
SAP	272	0.01	263	0.01	1.95
IIS	267	0.01	279	0.01	-5.67
Ultraseek	266	0.01	266	0.01	-1.43
Oracle9iAS	257	0.01	256	0.01	-1.04
SW	255	0.01	260	0.01	-3.32
Kerio	244	0.01	238	0.01	1.06
CloudFront	242	0.01	237	0.01	0.65
CoralWebPrx	236	0.01	241	0.01	-3.47
FC	229	0.01	226	0.01	-0.12
httpd+ssl	228	0.01	227	0.01	-0.99
Xitami	219	0.01	215	0.01	0.41
VB	216	0.01	214	0.01	-0.50
Hanbiro	216	0.01	217	0.01	-1.88
OSU	214	0.01	216	0.01	-2.34
NCSA	203	0.00	200	0.00	0.05

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.