Web servers market share on brand websites

Server software announced in response headers.

#	Technology	UK brands	United Kingdom	Global
1	nginx	11%	13%	18%
2	Apache HTTP Server	7%	12%	9.5%
3	Varnish	5.3%	5.2%	4.9%
4	Envoy	3.4%	0.9%	2.3%
5	Microsoft IIS	1.3%	2.9%	2.1%
6	LiteSpeed	1%	4.3%	2.1%
7	OpenResty	0.2%	0.4%	1.4%
8	Tengine	0.2%	<0.1%	0.5%
9	Kestrel	0.2%	0.2%	0.1%
10	Gunicorn	<0.1%	<0.1%	<0.1%
11	Caddy	0%	0.1%	0.2%

By site popularity

Share of measured sites in each Tranco popularity band that use the technology: the top 1,000, 10,000 and 100,000 sites and the whole top million.

#	Technology	Top 1K	Top 10K	Top 100K	Top 1M
1	nginx	5.7%	8.8%	7.1%	7.1%
2	Varnish	11%	7.4%	5.8%	5.6%
3	Envoy	14%	7.4%	5%	4.3%
4	Apache HTTP Server	5.7%	5.9%	5.4%	6.2%
5	Microsoft IIS	0%	0%	0.6%	0.9%
6	LiteSpeed	0%	0%	0%	0.4%
	Sites measured	35	136	496	678

Our crawler: 1,277 sites · UK brands · updated 13 Nov 2026 · Methodology