You are viewing an outdated report.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) 66,517,629 hostnames, but only 5,229,623 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 2020 Count	May 2020 %	April 2020 Count	April 2020 %	Growth %
Apache	2,133,427	40.80	2,146,049	40.33	1.14
nginx	1,295,724	24.78	1,319,152	24.79	-0.06
Microsoft-IIS	644,807	12.33	679,022	12.76	-3.38
null	337,968	6.46	340,593	6.40	0.96
Microsoft-HTTPAPI	249,263	4.77	260,205	4.89	-2.54
cloudflare	134,247	2.57	138,701	2.61	-1.52
LiteSpeed	63,745	1.22	62,570	1.18	3.65
Nginx	48,143	0.92	48,874	0.92	0.22
IdeaWebServer	42,149	0.81	42,577	0.80	0.72
Tengine	30,258	0.58	32,863	0.62	-6.32
BigIP	29,642	0.57	29,797	0.56	1.21
Apache-Coyote	23,929	0.46	25,195	0.47	-3.37
openresty	19,277	0.37	20,335	0.38	-3.55
AkamaiGHost	19,251	0.37	19,439	0.37	0.76
awselb	17,148	0.33	16,251	0.31	7.36
AmazonS3	11,149	0.21	10,241	0.19	10.76
Flywheel	7,964	0.15	8,192	0.15	-1.09
CloudFront	7,245	0.14	5,766	0.11	27.84
wts	5,692	0.11	5,558	0.10	4.20
lighttpd	4,679	0.09	4,724	0.09	0.77
nginx-rc	4,555	0.09	4,331	0.08	7.01
nginx-reuseport	4,161	0.08	4,172	0.08	1.47
Varnish	3,983	0.08	4,007	0.08	1.13
Lotus-Domino	2,990	0.06	3,056	0.06	-0.45
EZproxy	2,599	0.05	2,608	0.05	1.39
Caddy	2,583	0.05	2,504	0.05	4.95
WWW	2,197	0.04	2,082	0.04	7.36
Safedog	2,107	0.04	1,873	0.04	14.45
kangle	2,032	0.04	2,023	0.04	2.20
Cowboy	1,330	0.03	1,376	0.03	-1.66
squid	1,314	0.03	1,330	0.02	0.52
ws-httpd	1,161	0.02	1,154	0.02	2.36
Firewall	1,100	0.02	1,134	0.02	-1.31
scl	1,060	0.02	1,048	0.02	2.91
IIS	1,038	0.02	1,075	0.02	-1.76
AliyunOSS	1,036	0.02	1,032	0.02	2.14
Resin	989	0.02	1,017	0.02	-1.06
Icecast	888	0.02	875	0.02	3.25
IceWarp	869	0.02	876	0.02	0.93
Server	824	0.02	819	0.02	2.36
WDaemon	794	0.02	800	0.02	0.98
VWebServer	757	0.01	765	0.01	0.68
Microsoft-Azure-Application-Gateway	751	0.01	660	0.01	15.77
Destiny	745	0.01	753	0.01	0.66
GlassFish	705	0.01	733	0.01	-2.14
YxlinkWAF	696	0.01	866	0.02	-18.23
sffe	641	0.01	618	0.01	5.53
Zope	641	0.01	658	0.01	-0.89
Kestrel	635	0.01	664	0.01	-2.70
CHO	626	0.01	631	0.01	0.94
ScreenConnect	610	0.01	630	0.01	-1.49
ddos-guard	583	0.01	559	0.01	6.11
-	561	0.01	648	0.01	-11.92
o2switch-PowerBoost-v3	544	0.01	526	0.01	5.22
ECAcc	540	0.01	544	0.01	0.99
ATS	522	0.01	446	0.01	19.08
CentOS	507	0.01	543	0.01	-5.00
IBM_HTTP_Server	503	0.01	529	0.01	-3.26
Oracle-Application-Server-10g	496	0.01	510	0.01	-1.05
redir-httpd	488	0.01	487	0.01	1.95
Prometheus	458	0.01	381	0.01	22.31
OpenBSD	451	0.01	455	0.01	0.85
nginx-clojure	450	0.01	1,006	0.02	-54.49
EdgePrism	448	0.01	455	0.01	0.18
Rumpus	429	0.01	441	0.01	-1.03
QRATOR	426	0.01	422	0.01	2.71
III	425	0.01	443	0.01	-2.39
aruba-proxy	401	0.01	395	0.01	3.29
Web	374	0.01	397	0.01	-4.15
WildFly	353	0.01	372	0.01	-3.45
WAF	353	0.01	356	0.01	0.89
cc-web	343	0.01	349	0.01	-0.01
4D	340	0.01	338	0.01	2.34
ghs	337	0.01	317	0.01	8.16
shield	332	0.01	328	0.01	2.98
cloudflare-nginx	327	0.01	259	0.00	28.46
Protected	325	0.01	335	0.01	-1.29
LRBD-0a25541	325	0.01	0	0.00	N/A
CommuniGatePro	315	0.01	320	0.01	0.15
web	311	0.01	303	0.01	4.43
MageStack-MagentoOS	310	0.01	319	0.01	-1.13
WowzaStreamingEngine	305	0.01	298	0.01	4.13
Netscape-Enterprise	302	0.01	308	0.01	-0.24
UploadServer	294	0.01	289	0.01	3.50
Werkzeug	284	0.01	297	0.01	-2.71
Oracle-Application-Server-11g	283	0.01	297	0.01	-3.05
*****************	281	0.01	279	0.01	2.47
TornadoServer	280	0.01	295	0.01	-3.43
unknown	279	0.01	286	0.01	-0.75
WebServer	279	0.01	291	0.01	-2.45
ECS	277	0.01	287	0.01	-1.80
SonicWALL	262	0.01	257	0.00	3.72
gvs	260	0.00	0	0.00	N/A
myracloud	256	0.00	268	0.01	-2.81
bfe	256	0.00	247	0.00	5.45
ECD	253	0.00	251	0.00	2.55
awex	252	0.00	254	0.00	0.94
httpd	250	0.00	261	0.00	-2.55
******	248	0.00	0	0.00	N/A
VK	247	0.00	248	0.00	1.33

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.