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) 46,003,802 hostnames, but only 3,258,315 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 2025 Count	May 2025 %	April 2025 Count	April 2025 %	Growth %
Apache	1,080,985	33.18	1,102,772	33.09	0.26
nginx	1,035,248	31.77	1,056,952	31.71	0.18
null	366,518	11.25	365,799	10.98	2.48
Microsoft-IIS	165,875	5.09	171,592	5.15	-1.12
Microsoft-HTTPAPI	132,044	4.05	142,945	4.29	-5.52
cloudflare	101,419	3.11	101,550	3.05	2.15
LiteSpeed	91,839	2.82	102,804	3.08	-8.63
openresty	33,700	1.03	27,703	0.83	24.42
awselb	28,624	0.88	33,969	1.02	-13.81
IdeaWebServer	25,683	0.79	25,986	0.78	1.09
CloudFront	21,362	0.66	20,839	0.63	4.85
AmazonS3	19,714	0.61	19,886	0.60	1.40
BigIP	18,028	0.55	18,149	0.54	1.60
Nginx	16,042	0.49	17,786	0.53	-7.75
AkamaiGHost	14,643	0.45	13,675	0.41	9.52
Tengine	8,159	0.25	10,203	0.31	-18.21
Caddy	7,813	0.24	7,624	0.23	4.82
nginx-rc	6,140	0.19	6,214	0.19	1.06
Microsoft-Azure-Application-Gateway	5,101	0.16	5,101	0.15	2.28
Apache-Coyote	4,818	0.15	5,032	0.15	-2.07
wts	3,855	0.12	3,921	0.12	0.56
nginx-reuseport	3,279	0.10	3,290	0.10	1.94
ddos-guard	3,165	0.10	3,182	0.10	1.74
Varnish	2,896	0.09	2,955	0.09	0.24
Aws	1,884	0.06	1,903	0.06	1.26
lighttpd	1,841	0.06	1,896	0.06	-0.68
EZproxy	1,633	0.05	1,672	0.05	-0.10
hcdn	1,299	0.04	1,260	0.04	5.45
o2switch-PowerBoost-v3	1,295	0.04	1,273	0.04	4.05
AliyunOSS	1,177	0.04	1,184	0.04	1.68
F-WEB	1,137	0.03	1,256	0.04	-7.41
Lotus-Domino	1,082	0.03	1,099	0.03	0.70
aruba-proxy	956	0.03	957	0.03	2.18
Icecast	948	0.03	940	0.03	3.15
Golang.Server	938	0.03	973	0.03	-1.40
CW	923	0.03	921	0.03	2.51
QRATOR	897	0.03	905	0.03	1.38
rdwr	769	0.02	749	0.02	5.01
sffe	764	0.02	634	0.02	23.26
Server	746	0.02	828	0.02	-7.85
namecheap-nginx	513	0.02	514	0.02	2.08
IceWarp	512	0.02	515	0.02	1.69
squid	509	0.02	523	0.02	-0.46
elb	508	0.02	508	0.02	2.28
stgw	499	0.02	498	0.01	2.49
******	499	0.02	531	0.02	-3.88
istio-envoy	483	0.01	456	0.01	8.34
Safedog	471	0.01	270	0.01	78.43
OpenBSD	470	0.01	477	0.01	0.78
Web	455	0.01	474	0.01	-1.82
redir-httpd	429	0.01	433	0.01	1.34
envoy	429	0.01	433	0.01	1.34
volt-adc	421	0.01	392	0.01	9.85
Angie	413	0.01	379	0.01	11.46
WAF	395	0.01	395	0.01	2.28
myracloud	390	0.01	385	0.01	3.61
Windows-Azure-Blob	378	0.01	374	0.01	3.38
eClass	377	0.01	380	0.01	1.48
none	366	0.01	376	0.01	-0.44
Kestrel	361	0.01	376	0.01	-1.80
ldweb	354	0.01	355	0.01	1.99
Odoo.sh	342	0.01	338	0.01	3.49
WVS	340	0.01	355	0.01	-2.04
kangle	322	0.01	344	0.01	-4.26
UploadServer	311	0.01	286	0.01	11.22
OVHcloud	310	0.01	308	0.01	2.95
cdn	301	0.01	296	0.01	4.01
WWW	300	0.01	307	0.01	-0.05
OOS	269	0.01	268	0.01	2.66
*********	266	0.01	299	0.01	-9.01
WDaemon	261	0.01	265	0.01	0.74
uuWAF	236	0.01	0	0.00	N/A
ghs	235	0.01	204	0.01	17.83
cc-web	227	0.01	235	0.01	-1.20
LTC-h3	222	0.01	223	0.01	1.82
JSP3	220	0.01	233	0.01	-3.42
IIS	218	0.01	233	0.01	-4.30
NgxFence	212	0.01	0	0.00	N/A
ATS	207	0.01	211	0.01	0.34
Destiny	202	0.01	203	0.01	1.78
ArvanCloud	201	0.01	210	0.01	-2.10
snow_adc	199	0.01	197	0.01	3.32
*	199	0.01	197	0.01	3.32
Windows-Azure-Web	195	0.01	206	0.01	-3.18
**********	188	0.01	200	0.01	-3.85
BigScoots	183	0.01	181	0.01	3.41
GlassFish	180	0.01	190	0.01	-3.10
Resin	178	0.01	192	0.01	-5.18
cmproxy	173	0.01	185	0.01	-4.35
DBAppWAF	171	0.01	0	0.00	N/A
proxygen-bolt	166	0.01	188	0.01	-9.69
Rumpus	163	0.01	170	0.01	-1.93
kittenx	162	0.00	161	0.00	2.92
CloudWAF	162	0.00	170	0.01	-2.53
Sucuri	158	0.00	158	0.00	2.28
SY8045	158	0.00	163	0.00	-0.85
Fly	156	0.00	154	0.00	3.61
Werkzeug	154	0.00	0	0.00	N/A
jfe	151	0.00	0	0.00	N/A
Zeus	150	0.00	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.