Web servers in the UK: market share ranking

Server software announced in response headers.

#	Technology	United Kingdom	Global	Netherlands	Italy	Spain	Japan	Latin America
1	nginx	13%	18%	21%	22%	23%	33%	15%
2	Apache HTTP Server	12%	9.5%	15%	19%	20%	37%	18%
3	Varnish	5.2%	4.9%	2.4%	4.5%	2.5%	1.6%	1.8%
4	LiteSpeed	4.3%	2.1%	4.5%	3.1%	3%	0.9%	6.4%
5	Microsoft IIS	2.9%	2.1%	1.7%	3.7%	2.3%	1.5%	3.3%
6	Envoy	0.9%	2.3%	2%	0.8%	1.6%	0.5%	1.8%
7	OpenResty	0.4%	1.4%	0.5%	0.6%	0.5%	1.3%	1.1%
8	Kestrel	0.2%	0.1%	0.2%	0.1%	<0.1%	<0.1%	0.4%
9	Caddy	0.1%	0.2%	0.2%	<0.1%	0.2%	<0.1%	<0.1%
10	Gunicorn	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%	<0.1%
11	Tengine	<0.1%	0.5%	0%	<0.1%	<0.1%	<0.1%	<0.1%

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 10K	Top 100K	Top 1M
1	Varnish	27%	16%	5.2%
2	nginx	18%	14%	13%
3	Apache HTTP Server	12%	10%	12%
4	Microsoft IIS	3.3%	2%	2.9%
5	Envoy	3.3%	3.3%	0.9%
6	Gunicorn	1.7%	0.5%	<0.1%
7	LiteSpeed	0%	1.2%	4.3%
8	OpenResty	0%	0.2%	0.4%
9	Kestrel	0%	0.3%	0.2%
10	Caddy	0%	0%	0.1%
	Sites measured	60	886	11,322

Popular sites vs local business websites

Popular: sites of United Kingdom from the Tranco top million. Local business: websites of companies with 1–20 locations in the country, taken from a business places directory (platforms, marketplaces and aggregators excluded).

#	Technology	Popular sites	Local business	Difference, pp
	Any Web servers	37%	50%	+12.7
1	Apache HTTP Server	12%	20%	+8
2	nginx	13%	16%	+3.5
3	LiteSpeed	4.3%	11%	+6.7
4	Microsoft IIS	2.9%	1.3%	−1.7
5	Varnish	5.2%	1.2%	−4
6	OpenResty	0.4%	0.5%	+0.1
7	Caddy	0.1%	0.3%	+0.2
8	Envoy	0.9%	<0.1%	−0.9
9	Kestrel	0.2%	<0.1%	−0.2
10	Gunicorn	<0.1%	<0.1%	−0.1
	Sites measured	11,322	20,305

Our crawler: 11,322 sites · United Kingdom · updated 13 Nov 2026 · Methodology