You are viewing an outdated report.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) 65,650,906 hostnames, but only 5,266,363 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 2013 Count	April 2013 %	March 2013 Count	March 2013 %	Growth %
Apache	3,062,861	58.16	3,062,655	58.41	-0.43
Microsoft-IIS	1,020,784	19.38	1,016,671	19.39	-0.04
null	423,689	8.05	425,428	8.11	-0.85
nginx	285,718	5.43	275,391	5.25	3.29
Microsoft-HTTPAPI	111,168	2.11	108,482	2.07	2.02
Apache-Coyote	55,647	1.06	55,885	1.07	-0.87
IdeaWebServer	48,963	0.93	48,422	0.92	0.67
LiteSpeed	26,895	0.51	26,963	0.51	-0.69
Rapidsite	26,562	0.50	27,004	0.52	-2.07
lighttpd	20,591	0.39	20,819	0.40	-1.53
A	12,833	0.24	13,013	0.25	-1.82
AkamaiGHost	10,720	0.20	4,301	0.08	148.14
BigIP	10,663	0.20	10,517	0.20	0.94
Lotus-Domino	9,937	0.19	10,074	0.19	-1.80
squid	7,684	0.15	7,298	0.14	4.82
IBM_HTTP_Server	6,504	0.12	6,608	0.13	-2.01
cloudflare-nginx	5,437	0.10	5,361	0.10	0.97
HTTPD	3,697	0.07	3,595	0.07	2.38
Oracle-Application-Server-10g	3,223	0.06	3,236	0.06	-0.84
Zope	3,217	0.06	3,276	0.06	-2.23
Resin	2,954	0.06	3,003	0.06	-2.07
EZproxy	2,158	0.04	2,143	0.04	0.26
Cougar	1,910	0.04	1,928	0.04	-1.37
-	1,894	0.04	1,885	0.04	0.03
Varnish	1,815	0.03	1,753	0.03	3.08
Zeus	1,791	0.03	1,795	0.03	-0.66
WDaemon	1,762	0.03	1,743	0.03	0.64
Sun-ONE-Web-Server	1,752	0.03	1,764	0.03	-1.12
Web	1,614	0.03	1,622	0.03	-0.93
Tengine	1,517	0.03	1,392	0.03	8.50
IceWarp	1,517	0.03	1,532	0.03	-1.42
xServers	1,479	0.03	1,447	0.03	1.76
MochiWeb	1,393	0.03	1,288	0.02	7.67
kangle	1,366	0.03	1,362	0.03	-0.15
hosting	1,359	0.03	1,275	0.02	6.12
Netscape-Enterprise	1,239	0.02	1,284	0.02	-3.93
III	1,194	0.02	1,195	0.02	-0.52
GWS	1,105	0.02	1,108	0.02	-0.71
Cherokee	1,046	0.02	1,067	0.02	-2.40
thttpd	1,006	0.02	1,034	0.02	-3.14
sffe	1,002	0.02	849	0.02	17.50
Nginx	956	0.02	947	0.02	0.50
Rumpus	943	0.02	940	0.02	-0.12
Boa	933	0.02	953	0.02	-2.53
cpsrvd	916	0.02	910	0.02	0.21
Oracle	912	0.02	917	0.02	-0.98
Apache-AdvancedExtranetServer	833	0.02	837	0.02	-0.92
GlassFish	819	0.02	789	0.02	3.34
Sun-Java-System-Web-Server	818	0.02	836	0.02	-2.59
Bomgar	779	0.01	769	0.01	0.85
CommuniGatePro	776	0.01	793	0.02	-2.58
httpd	769	0.01	796	0.02	-3.82
FC	767	0.01	671	0.01	13.80
Sun	752	0.01	748	0.01	0.09
Jetty	741	0.01	662	0.01	11.44
WP	710	0.01	292	0.01	142.08
Oracle-Application-Server-11g	665	0.01	633	0.01	4.59
WebServer	658	0.01	664	0.01	-1.34
WWW	627	0.01	640	0.01	-2.46
smartcds	625	0.01	608	0.01	2.34
ApacheBooster	555	0.01	535	0.01	3.28
NOYB	549	0.01	534	0.01	2.36
Server	548	0.01	528	0.01	3.33
AnWeb	547	0.01	595	0.01	-8.47
redir-httpd	515	0.01	515	0.01	-0.44
WebServerX	515	0.01	518	0.01	-1.02
WebtoB	456	0.01	472	0.01	-3.82
Abyss	429	0.01	442	0.01	-3.37
FlashCom	427	0.01	422	0.01	0.74
ListManagerWeb	426	0.01	437	0.01	-2.95
PWS	422	0.01	415	0.01	1.24
Ipswitch-IMail	415	0.01	424	0.01	-2.55
EdgePrism	412	0.01	427	0.01	-3.94
ATS	407	0.01	0	0.00	N/A
Oracle-iPlanet-Web-Server	402	0.01	394	0.01	1.58
Demandware	402	0.01	394	0.01	1.58
IBM_HTTP_SERVER	401	0.01	416	0.01	-4.03
*****************	390	0.01	383	0.01	1.38
Unknown	383	0.01	363	0.01	5.04
AOLserver	373	0.01	373	0.01	-0.44
FileMakerPro	370	0.01	369	0.01	-0.17
DinaHTTPd	368	0.01	391	0.01	-6.30
HTTP	367	0.01	361	0.01	1.21
SAP	365	0.01	359	0.01	1.22
WebSphere	357	0.01	371	0.01	-4.20
4D_WebStar_D	357	0.01	359	0.01	-1.00
AmazonS3	331	0.01	285	0.01	15.63
WS	318	0.01	313	0.01	1.15
WebSTAR	317	0.01	323	0.01	-2.29
SonicWALL	312	0.01	299	0.01	3.89
Google	310	0.01	302	0.01	2.20
ngx_openresty	299	0.01	265	0.01	12.33
OpenCms	299	0.01	299	0.01	-0.44
Indy	298	0.01	299	0.01	-0.77
WebLogic	297	0.01	316	0.01	-6.43
ASERVER	296	0.01	0	0.00	N/A
maged	295	0.01	265	0.01	10.83
WebSite	279	0.01	276	0.01	0.64
Roxen	273	0.01	270	0.01	0.66
RomPager	272	0.01	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.