You are viewing an outdated report.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) 57,621,631 hostnames, but only 4,954,749 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 2019 Count	April 2019 %	March 2019 Count	March 2019 %	Growth %
Apache	2,170,073	43.80	2,189,511	44.54	-1.67
nginx	1,064,083	21.48	1,035,395	21.06	1.96
Microsoft-IIS	654,420	13.21	649,676	13.22	-0.06
null	309,989	6.26	309,808	6.30	-0.73
Microsoft-HTTPAPI	274,047	5.53	259,562	5.28	4.75
cloudflare	118,712	2.40	113,855	2.32	3.44
LiteSpeed	48,501	0.98	47,510	0.97	1.28
IdeaWebServer	45,073	0.91	45,527	0.93	-1.78
BigIP	29,565	0.60	29,354	0.60	-0.07
Apache-Coyote	28,028	0.57	28,280	0.58	-1.67
openresty	24,334	0.49	23,369	0.48	3.31
AkamaiGHost	16,936	0.34	16,263	0.33	3.32
Tengine	14,000	0.28	13,284	0.27	4.56
Flywheel	13,113	0.26	13,174	0.27	-1.25
AmazonS3	8,719	0.18	8,355	0.17	3.53
awselb	6,168	0.12	5,111	0.10	19.73
lighttpd	5,612	0.11	5,680	0.12	-1.98
wts	5,534	0.11	5,455	0.11	0.65
CloudFront	4,448	0.09	4,776	0.10	-7.60
Varnish	4,395	0.09	4,376	0.09	-0.36
Lotus-Domino	3,593	0.07	3,639	0.07	-2.04
WWW	3,552	0.07	3,589	0.07	-1.81
nginx-reuseport	3,436	0.07	3,374	0.07	1.04
Safedog	2,910	0.06	2,748	0.06	5.06
EZproxy	2,583	0.05	2,589	0.05	-1.02
kangle	2,538	0.05	2,519	0.05	-0.04
nginx-rc	2,429	0.05	2,300	0.05	4.78
Firewall	1,948	0.04	2,337	0.05	-17.30
Cowboy	1,842	0.04	1,816	0.04	0.63
squid	1,811	0.04	1,842	0.04	-2.46
Caddy	1,626	0.03	1,595	0.03	1.14
ClausWeb-nginx	1,577	0.03	1,543	0.03	1.40
IIS	1,479	0.03	1,429	0.03	2.68
Kestrel	1,228	0.02	814	0.02	49.67
-	1,156	0.02	915	0.02	25.34
ws-httpd	1,155	0.02	1,156	0.02	-0.87
Resin	1,088	0.02	1,079	0.02	0.04
IceWarp	947	0.02	947	0.02	-0.79
Linux	904	0.02	895	0.02	0.21
imunify360-webshield	900	0.02	0	0.00	N/A
WDaemon	890	0.02	890	0.02	-0.79
YxlinkWAF	870	0.02	824	0.02	4.75
scl	847	0.02	776	0.02	8.29
Zope	845	0.02	857	0.02	-2.18
CentOS	830	0.02	785	0.02	4.90
Destiny	798	0.02	796	0.02	-0.54
VWebServer	781	0.02	699	0.01	10.85
IBM_HTTP_Server	778	0.02	796	0.02	-3.03
GlassFish	769	0.02	787	0.02	-3.06
sffe	767	0.02	750	0.02	1.46
III	742	0.01	776	0.02	-5.13
Icecast	729	0.01	704	0.01	2.74
ScreenConnect	709	0.01	707	0.01	-0.51
Server	698	0.01	705	0.01	-1.77
CHO	689	0.01	691	0.01	-1.08
linuxOS	640	0.01	647	0.01	-1.86
Nginx	637	0.01	619	0.01	2.10
AliyunOSS	601	0.01	561	0.01	6.29
Oracle-Application-Server-10g	596	0.01	615	0.01	-3.85
ECAcc	563	0.01	556	0.01	0.46
PWS	520	0.01	591	0.01	-12.71
Web	517	0.01	517	0.01	-0.79
Rumpus	514	0.01	518	0.01	-1.55
ATS	497	0.01	484	0.01	1.88
redir-httpd	488	0.01	489	0.01	-0.99
WebServer	483	0.01	502	0.01	-4.54
EdgePrism	449	0.01	459	0.01	-2.95
OpenBSD	415	0.01	406	0.01	1.41
Protected	413	0.01	412	0.01	-0.55
Oracle-Application-Server-11g	398	0.01	410	0.01	-3.69
QRATOR	389	0.01	396	0.01	-2.54
CommuniGatePro	374	0.01	380	0.01	-2.35
Bomgar	374	0.01	391	0.01	-5.10
WildFly	367	0.01	363	0.01	0.31
*****************	363	0.01	362	0.01	-0.51
cc-web	332	0.01	329	0.01	0.12
aruba-proxy	332	0.01	322	0.01	2.29
ECS	323	0.01	324	0.01	-1.09
web	321	0.01	314	0.01	1.42
WowzaStreamingEngine	321	0.01	316	0.01	0.78
WAF	317	0.01	334	0.01	-5.84
MageStack-MagentoOS	317	0.01	313	0.01	0.48
LRBD-f0502f4	316	0.01	0	0.00	N/A
Cougar	314	0.01	327	0.01	-4.73
httpd	312	0.01	320	0.01	-3.27
4D	304	0.01	301	0.01	0.20
Netscape-Enterprise	295	0.01	296	0.01	-1.12
ngjit	289	0.01	270	0.01	6.19
ghs	284	0.01	281	0.01	0.27
TWebAP	279	0.01	285	0.01	-2.88
Footprint	278	0.01	259	0.01	6.49
Werkzeug	269	0.01	271	0.01	-1.52
360wzws	265	0.01	258	0.01	1.90
1	258	0.01	265	0.01	-3.41
shield	257	0.01	0	0.00	N/A
awex	252	0.01	250	0.01	0.01
long1	251	0.01	251	0.01	-0.79
bfe	250	0.01	255	0.01	-2.73
SonicWALL	248	0.01	256	0.01	-3.89
Abyss	248	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.