You are viewing an outdated report.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) 44,100,570 hostnames, but only 4,013,620 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	April 2010 Count	April 2010 %	March 2010 Count	March 2010 %	Growth %
Apache	2,353,369	58.63	2,344,568	58.63	0.01
Microsoft-IIS	976,820	24.34	978,212	24.46	-0.51
null	303,426	7.56	300,875	7.52	0.48
nginx	60,073	1.50	57,168	1.43	4.70
Rapidsite	53,676	1.34	54,670	1.37	-2.18
Apache-Coyote	36,003	0.90	35,629	0.89	0.68
IdeaWebServer	29,168	0.73	28,697	0.72	1.27
Microsoft-HTTPAPI	19,975	0.50	18,340	0.46	8.52
lighttpd	18,996	0.47	18,276	0.46	3.56
A	17,685	0.44	17,838	0.45	-1.22
Lotus-Domino	12,095	0.30	12,228	0.31	-1.45
LiteSpeed	7,448	0.19	7,121	0.18	4.21
IBM_HTTP_Server	6,369	0.16	6,357	0.16	-0.18
squid	4,390	0.11	4,334	0.11	0.92
Zope	4,281	0.11	4,291	0.11	-0.60
BigIP	4,185	0.10	4,004	0.10	4.14
Oracle-Application-Server-10g	4,026	0.10	4,022	0.10	-0.26
Netscape-Enterprise	3,541	0.09	3,672	0.09	-3.92
Resin	3,382	0.08	3,403	0.09	-0.98
Sun-ONE-Web-Server	3,249	0.08	3,332	0.08	-2.85
Zeus	3,216	0.08	3,244	0.08	-1.22
AkamaiGHost	2,586	0.06	2,685	0.07	-4.04
Cougar	2,356	0.06	2,376	0.06	-1.20
Apache-AdvancedExtranetServer	1,900	0.05	1,974	0.05	-4.10
GWS	1,795	0.04	1,829	0.05	-2.22
WDaemon	1,615	0.04	1,594	0.04	0.95
IceWarp	1,553	0.04	1,574	0.04	-1.69
WebServerX	1,492	0.04	1,489	0.04	-0.16
EZproxy	1,435	0.04	1,418	0.04	0.83
NOYB	1,379	0.03	1,461	0.04	-5.96
Jetty	1,349	0.03	1,365	0.03	-1.53
PowerSchool	1,270	0.03	1,245	0.03	1.64
WWW	1,268	0.03	1,320	0.03	-4.29
Oracle	1,174	0.03	1,203	0.03	-2.77
Sun-Java-System-Web-Server	1,167	0.03	1,149	0.03	1.20
III	1,140	0.03	1,135	0.03	0.08
Web	1,135	0.03	1,152	0.03	-1.83
Boa	1,123	0.03	1,151	0.03	-2.79
IBM_HTTP_SERVER	1,089	0.03	1,132	0.03	-4.15
thttpd	1,075	0.03	1,110	0.03	-3.51
Ipswitch-IMail	970	0.02	981	0.02	-1.48
CommuniGatePro	942	0.02	950	0.02	-1.20
apache	938	0.02	803	0.02	16.39
HTTPD	920	0.02	858	0.02	6.84
AnWeb	855	0.02	897	0.02	-5.03
httpd	830	0.02	834	0.02	-0.84
WebLogic	811	0.02	818	0.02	-1.22
cpsrvd	799	0.02	792	0.02	0.52
WebSTAR	778	0.02	801	0.02	-3.22
FileMakerPro	723	0.02	748	0.02	-3.69
ListManagerWeb	703	0.02	702	0.02	-0.22
sffe	691	0.02	688	0.02	0.07
Sun	672	0.02	676	0.02	-0.95
4D_WebStar_D	670	0.02	678	0.02	-1.54
WebtoB	639	0.02	644	0.02	-1.14
BIG-IP	593	0.01	633	0.02	-6.66
WebSite	546	0.01	562	0.01	-3.20
Windows	545	0.01	559	0.01	-2.86
AOLserver	529	0.01	533	0.01	-1.11
redir-httpd	514	0.01	515	0.01	-0.56
DeleGate	490	0.01	503	0.01	-2.94
WebSitePro	483	0.01	509	0.01	-5.45
Rumpus	482	0.01	472	0.01	1.75
Secured	446	0.01	455	0.01	-2.33
4D_WebSTAR_S	444	0.01	453	0.01	-2.34
JRun	432	0.01	429	0.01	0.33
Cherokee	428	0.01	387	0.01	10.19
Abyss	417	0.01	421	0.01	-1.31
Power	408	0.01	440	0.01	-7.61
WebServer	397	0.01	398	0.01	-0.61
EdgePrism	392	0.01	349	0.01	11.91
TimmiT	384	0.01	0	0.00	N/A
WebSphere	367	0.01	374	0.01	-2.23
Server	357	0.01	368	0.01	-3.34
Roxen	356	0.01	358	0.01	-0.92
SAMBAR	350	0.01	367	0.01	-4.98
""	347	0.01	357	0.01	-3.15
Stronghold	332	0.01	345	0.01	-4.12
Indy	332	0.01	344	0.01	-3.84
ThirdSphere	325	0.01	402	0.01	-19.45
Bomgar	316	0.01	300	0.01	4.95
NetCache	315	0.01	330	0.01	-4.89
ENIAC	306	0.01	310	0.01	-1.65
Varnish	300	0.01	275	0.01	8.69
Orion	285	0.01	292	0.01	-2.75
IIS	279	0.01	280	0.01	-0.72
Ultraseek	266	0.01	264	0.01	0.39
SAP	263	0.01	268	0.01	-2.22
SW	260	0.01	238	0.01	8.85
Oracle9iAS	256	0.01	261	0.01	-2.27
CoralWebPrx	241	0.01	271	0.01	-11.39
Kerio	238	0.01	241	0.01	-1.60
CloudFront	237	0.01	303	0.01	-22.07
httpd+ssl	227	0.01	234	0.01	-3.34
FC	226	0.01	207	0.01	8.78
Hanbiro	217	0.01	217	0.01	-0.36
OSU	216	0.01	218	0.01	-1.28
Xitami	215	0.01	227	0.01	-5.63
VB	214	0.01	214	0.01	-0.36
NCSA	200	0.00	206	0.01	-3.27

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.