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) 47,477,051 hostnames, but only 3,332,699 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 2025 Count	April 2025 %	March 2025 Count	March 2025 %	Growth %
Apache	1,102,772	33.09	1,113,814	33.29	-0.60
nginx	1,056,952	31.71	1,062,156	31.74	-0.09
null	365,799	10.98	367,154	10.97	0.03
Microsoft-IIS	171,592	5.15	173,064	5.17	-0.46
Microsoft-HTTPAPI	142,945	4.29	147,110	4.40	-2.44
LiteSpeed	102,804	3.08	93,204	2.79	10.74
cloudflare	101,550	3.05	101,691	3.04	0.26
awselb	33,969	1.02	34,219	1.02	-0.34
openresty	27,703	0.83	27,513	0.82	1.09
IdeaWebServer	25,986	0.78	26,195	0.78	-0.40
CloudFront	20,839	0.63	21,033	0.63	-0.53
AmazonS3	19,886	0.60	20,065	0.60	-0.50
BigIP	18,149	0.54	18,368	0.55	-0.80
Nginx	17,786	0.53	18,778	0.56	-4.91
AkamaiGHost	13,675	0.41	12,711	0.38	8.01
Tengine	10,203	0.31	9,601	0.29	6.69
Caddy	7,624	0.23	7,423	0.22	3.12
nginx-rc	6,214	0.19	6,208	0.19	0.49
Microsoft-Azure-Application-Gateway	5,101	0.15	5,062	0.15	1.17
Apache-Coyote	5,032	0.15	5,228	0.16	-3.37
wts	3,921	0.12	3,953	0.12	-0.42
nginx-reuseport	3,290	0.10	3,296	0.10	0.21
ddos-guard	3,182	0.10	3,154	0.09	1.29
Varnish	2,955	0.09	2,929	0.09	1.29
Aws	1,903	0.06	1,914	0.06	-0.18
lighttpd	1,896	0.06	1,923	0.06	-1.01
EZproxy	1,672	0.05	1,687	0.05	-0.50
o2switch-PowerBoost-v3	1,273	0.04	1,248	0.04	2.41
hcdn	1,260	0.04	1,258	0.04	0.56
F-WEB	1,256	0.04	1,059	0.03	19.07
AliyunOSS	1,184	0.04	1,188	0.04	0.06
Lotus-Domino	1,099	0.03	1,132	0.03	-2.53
BitNinja	1,087	0.03	0	0.00	N/A
Golang.Server	973	0.03	970	0.03	0.71
aruba-proxy	957	0.03	1,016	0.03	-5.43
Icecast	940	0.03	923	0.03	2.25
CW	921	0.03	913	0.03	1.28
QRATOR	905	0.03	896	0.03	1.41
Server	828	0.02	845	0.03	-1.62
rdwr	749	0.02	758	0.02	-0.79
sffe	634	0.02	697	0.02	-8.68
******	531	0.02	527	0.02	1.16
squid	523	0.02	515	0.02	1.96
IceWarp	515	0.02	519	0.02	-0.38
namecheap-nginx	514	0.02	514	0.02	0.40
elb	508	0.02	501	0.01	1.80
stgw	498	0.01	490	0.01	2.04
OpenBSD	477	0.01	485	0.01	-1.26
Web	474	0.01	476	0.01	-0.02
istio-envoy	456	0.01	471	0.01	-2.80
redir-httpd	433	0.01	433	0.01	0.40
envoy	433	0.01	430	0.01	1.10
WAF	395	0.01	401	0.01	-1.10
volt-adc	392	0.01	368	0.01	6.95
myracloud	385	0.01	385	0.01	0.40
eClass	380	0.01	382	0.01	-0.13
Angie	379	0.01	375	0.01	1.47
none	376	0.01	379	0.01	-0.40
Kestrel	376	0.01	379	0.01	-0.40
Windows-Azure-Blob	374	0.01	370	0.01	1.48
ldweb	355	0.01	351	0.01	1.54
WVS	355	0.01	351	0.01	1.54
kangle	344	0.01	348	0.01	-0.76
Odoo.sh	338	0.01	331	0.01	2.52
OVHcloud	308	0.01	308	0.01	0.40
WWW	307	0.01	320	0.01	-3.68
*********	299	0.01	294	0.01	2.11
cdn	296	0.01	220	0.01	35.08
UploadServer	286	0.01	310	0.01	-7.38
Safedog	270	0.01	493	0.01	-45.02
OOS	268	0.01	273	0.01	-1.44
WDaemon	265	0.01	267	0.01	-0.35
cc-web	235	0.01	237	0.01	-0.45
JSP3	233	0.01	249	0.01	-6.05
IIS	233	0.01	237	0.01	-1.30
LTC-h3	223	0.01	222	0.01	0.85
ATS	211	0.01	206	0.01	2.83
ArvanCloud	210	0.01	211	0.01	-0.08
Windows-Azure-Web	206	0.01	206	0.01	0.40
ghs	204	0.01	216	0.01	-5.18
Destiny	203	0.01	210	0.01	-2.95
**********	200	0.01	196	0.01	2.45
snow_adc	197	0.01	203	0.01	-2.57
*	197	0.01	198	0.01	-0.11
Resin	192	0.01	196	0.01	-1.65
GlassFish	190	0.01	192	0.01	-0.65
proxygen-bolt	188	0.01	158	0.00	19.46
cmproxy	185	0.01	189	0.01	-1.73
BigScoots	181	0.01	182	0.01	-0.15
Rumpus	170	0.01	172	0.01	-0.77
CloudWAF	170	0.01	171	0.01	-0.19
SY8045	163	0.00	166	0.00	-1.42
kittenx	161	0.00	159	0.00	1.66
Byte-nginx	161	0.00	0	0.00	N/A
web	158	0.00	171	0.01	-7.23
Sucuri	158	0.00	158	0.00	0.40
4D	157	0.00	163	0.00	-3.30
webserver	155	0.00	154	0.00	1.05
Fly	154	0.00	157	0.00	-1.52
CommuniGatePro	153	0.00	154	0.00	-0.25

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.