Web servers market share on brand websites

Server software announced in response headers.

#	Technology	UK brands	United Kingdom	Global
1	nginx	11%	13%	19%
2	Apache HTTP Server	6.8%	13%	9.7%
3	Varnish	5.4%	5.3%	4.9%
4	Envoy	3.1%	0.8%	2.3%
5	Microsoft IIS	1.3%	2.8%	2.1%
6	LiteSpeed	1%	4.8%	2.1%
7	OpenResty	0.2%	0.3%	1.4%
8	Tengine	0.1%	<0.1%	0.5%
9	Kestrel	0.1%	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	5.3%	9.6%	7%	6.8%
2	Envoy	16%	9.6%	5.6%	4.2%
3	Varnish	11%	8.1%	6.6%	6%
4	Apache HTTP Server	5.3%	7.4%	5.6%	6.4%
5	Microsoft IIS	0%	0%	0.8%	1%
6	LiteSpeed	0%	0%	0%	0.4%
	Sites measured	38	136	503	689

Our crawler: 1,359 sites · UK brands · updated 23 Oct 2026 · Methodology