CSS frameworks market share in the UK

Utility and component CSS libraries.

#	Technology	United Kingdom	Global	Netherlands	Italy	Spain	Japan	Latin America
1	Bootstrap	35%	24%	32%	42%	43%	9.9%	37%
2	Tailwind CSS	9.9%	11%	13%	7.2%	6.6%	2.9%	8.8%
3	Foundation	1.1%	0.5%	1%	0.6%	0.5%	0.4%	0.4%
4	MUI	0.5%	0.7%	0.5%	0.6%	0.4%	0.2%	0.6%
5	UIkit	0.3%	0.3%	0.4%	0.8%	0.7%	0.3%	0.8%
6	Chakra UI	0.1%	0.2%	0.3%	<0.1%	<0.1%	<0.1%	0.2%
7	Bulma	<0.1%	<0.1%	<0.1%	<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	Bootstrap	13%	25%	35%
2	Tailwind CSS	5%	12%	9.9%
3	MUI	1.7%	0.9%	0.5%
4	Foundation	0%	1%	1.1%
5	UIkit	0%	0%	0.3%
6	Chakra UI	0%	0.1%	0.1%
7	Bulma	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 CSS frameworks	45%	25%	−20.8
1	Bootstrap	35%	18%	−16.8
2	Tailwind CSS	9.9%	4.8%	−5.1
3	Foundation	1.1%	0.9%	−0.2
4	UIkit	0.3%	0.8%	+0.4
5	MUI	0.5%	0.2%	−0.2
6	Bulma	<0.1%	<0.1%	0
7	Chakra UI	0.1%	<0.1%	−0.1
	Sites measured	11,322	20,305

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