CSS frameworks in the UK: market share ranking

Utility and component CSS libraries.

#	Technology	United Kingdom	Global	Netherlands	Italy	Spain	Japan	Latin America
1	Bootstrap	33%	25%	28%	41%	44%	10%	37%
2	Tailwind CSS	11%	11%	13%	7.4%	6.4%	3.3%	8.3%
3	Foundation	1%	0.5%	1%	0.7%	0.5%	0.3%	0.4%
4	MUI	0.4%	0.7%	0.5%	0.5%	0.4%	0.2%	0.6%
5	UIkit	0.3%	0.3%	0.4%	0.8%	0.8%	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	17%	28%	33%
2	Tailwind CSS	4.5%	11%	11%
3	MUI	1.5%	0.8%	0.4%
4	Foundation	0%	0.8%	1%
5	UIkit	0%	0%	0.3%
6	Chakra UI	0%	0.1%	0.1%
7	Bulma	0%	0%	<0.1%
	Sites measured	66	931	11,909

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	43%	23%	−20.1
1	Bootstrap	33%	17%	−15.3
2	Tailwind CSS	11%	4.6%	−6
3	Foundation	1%	0.9%	−0.2
4	UIkit	0.3%	0.7%	+0.4
5	MUI	0.4%	0.2%	−0.2
6	Bulma	<0.1%	<0.1%	0
7	Chakra UI	0.1%	<0.1%	−0.1
	Sites measured	11,909	21,114

Our crawler: 11,909 sites · United Kingdom · updated 23 Oct 2026 · Methodology