You are viewing an outdated report.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) 64,064,201 hostnames, but only 4,853,649 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	December 2020 Count	December 2020 %	November 2020 Count	November 2020 %	Growth %
Apache	1,995,321	41.11	2,012,345	41.35	-0.58
nginx	1,241,744	25.58	1,228,855	25.25	1.32
Microsoft-IIS	490,111	10.10	498,778	10.25	-1.47
null	340,351	7.01	335,604	6.90	1.69
Microsoft-HTTPAPI	203,860	4.20	210,116	4.32	-2.71
cloudflare	127,519	2.63	128,765	2.65	-0.70
LiteSpeed	71,676	1.48	69,924	1.44	2.78
Nginx	59,246	1.22	61,016	1.25	-2.64
IdeaWebServer	40,549	0.84	40,758	0.84	-0.24
BigIP	29,355	0.60	29,486	0.61	-0.17
openresty	26,381	0.54	25,855	0.53	2.31
awselb	23,729	0.49	21,591	0.44	10.20
Tengine	22,893	0.47	24,085	0.49	-4.69
Apache-Coyote	20,132	0.41	20,579	0.42	-1.91
AkamaiGHost	17,815	0.37	18,981	0.39	-5.89
AmazonS3	13,622	0.28	13,081	0.27	4.42
CloudFront	8,106	0.17	6,336	0.13	28.28
Flywheel	6,985	0.14	7,136	0.15	-1.85
nginx-rc	5,508	0.11	5,379	0.11	2.68
wts	4,519	0.09	4,924	0.10	-7.98
lighttpd	4,301	0.09	4,322	0.09	-0.22
Varnish	4,195	0.09	4,214	0.09	-0.18
nginx-reuseport	4,177	0.09	4,178	0.09	0.25
Firewall	3,274	0.07	3,179	0.07	3.27
Caddy	2,963	0.06	2,891	0.06	2.77
Lotus-Domino	2,679	0.06	2,713	0.06	-0.99
EZproxy	2,543	0.05	2,551	0.05	-0.04
WWW	1,722	0.04	1,818	0.04	-5.02
Microsoft-Azure-Application-Gateway	1,406	0.03	1,292	0.03	9.12
Safedog	1,391	0.03	1,137	0.02	22.67
kangle	1,261	0.03	1,250	0.03	1.15
Server	1,256	0.03	1,268	0.03	-0.68
Cowboy	1,209	0.02	1,202	0.02	0.85
ws-httpd	1,142	0.02	1,139	0.02	0.53
squid	1,138	0.02	1,140	0.02	0.09
E2EE	1,125	0.02	795	0.02	41.89
AliyunOSS	1,122	0.02	1,116	0.02	0.81
scl	1,115	0.02	1,087	0.02	2.85
Icecast	885	0.02	882	0.02	0.61
VWebServer	835	0.02	825	0.02	1.49
IceWarp	825	0.02	829	0.02	-0.21
WDaemon	749	0.02	754	0.02	-0.39
IIS	716	0.01	739	0.02	-2.85
ddos-guard	701	0.01	666	0.01	5.54
Resin	695	0.01	749	0.02	-6.96
Destiny	685	0.01	689	0.01	-0.31
sffe	648	0.01	501	0.01	29.69
GlassFish	635	0.01	631	0.01	0.91
Kestrel	628	0.01	610	0.01	3.23
o2switch-PowerBoost-v3	625	0.01	610	0.01	2.74
CHO	606	0.01	607	0.01	0.11
Prometheus	604	0.01	629	0.01	-3.71
ScreenConnect	571	0.01	566	0.01	1.16
Zope	548	0.01	564	0.01	-2.57
ATS	498	0.01	472	0.01	5.79
-	498	0.01	508	0.01	-1.70
redir-httpd	486	0.01	487	0.01	0.06
OpenBSD	482	0.01	477	0.01	1.32
aruba-proxy	442	0.01	433	0.01	2.35
QRATOR	435	0.01	424	0.01	2.87
Oracle-Application-Server-10g	427	0.01	436	0.01	-1.80
ECAcc	410	0.01	486	0.01	-15.41
Web	407	0.01	414	0.01	-1.42
IBM_HTTP_Server	405	0.01	422	0.01	-3.77
Rumpus	398	0.01	407	0.01	-1.95
cloudflare-nginx	390	0.01	388	0.01	0.79
CentOS	377	0.01	381	0.01	-0.78
uvicorn	373	0.01	0	0.00	N/A
YxlinkWAF	363	0.01	384	0.01	-5.21
******	347	0.01	339	0.01	2.64
ghs	345	0.01	327	0.01	5.79
cc-web	344	0.01	344	0.01	0.27
UploadServer	343	0.01	342	0.01	0.56
web	341	0.01	345	0.01	-0.89
WildFly	331	0.01	338	0.01	-1.81
EdgePrism	326	0.01	327	0.01	-0.04
III	325	0.01	333	0.01	-2.14
LRBD-d513a0c	321	0.01	0	0.00	N/A
shield	319	0.01	316	0.01	1.22
nginx-upupw	309	0.01	304	0.01	1.92
4D	308	0.01	310	0.01	-0.38
WAF	306	0.01	340	0.01	-9.76
CommuniGatePro	300	0.01	307	0.01	-2.02
elb	297	0.01	284	0.01	4.86
eClass	291	0.01	286	0.01	2.02
Protected	290	0.01	287	0.01	1.32
Netscape-Enterprise	290	0.01	290	0.01	0.27
MageStack-MagentoOS	289	0.01	287	0.01	0.97
ddosx	287	0.01	272	0.01	5.80
WowzaStreamingEngine	287	0.01	289	0.01	-0.42
bfe	278	0.01	269	0.01	3.63
Werkzeug	276	0.01	278	0.01	-0.45
unknown	262	0.01	268	0.01	-1.97
envoy	262	0.01	271	0.01	-3.06
kittenx	256	0.01	260	0.01	-1.27
*****************	254	0.01	244	0.01	4.38
awex	253	0.01	253	0.01	0.27
WebServer	249	0.01	258	0.01	-3.23
SonicWALL	249	0.01	0	0.00	N/A
ECS	249	0.01	254	0.01	-1.70

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.