CSS frameworks market share on brand websites

Utility and component CSS libraries.

#	Technology	UK brands	United Kingdom	Global
1	Bootstrap	29%	35%	24%
2	Tailwind CSS	13%	9.9%	11%
3	MUI	1.3%	0.5%	0.7%
4	Foundation	1.1%	1.1%	0.5%
5	Chakra UI	0.5%	0.1%	0.2%
6	UIkit	0.2%	0.3%	0.3%
7	Bulma	0%	<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 1K	Top 10K	Top 100K	Top 1M
1	Bootstrap	14%	13%	24%	27%
2	Tailwind CSS	8.6%	9.6%	12%	13%
3	MUI	2.9%	1.5%	2%	1.6%
4	Chakra UI	0%	0%	0.6%	0.7%
5	Foundation	0%	0%	0.6%	0.6%
	Sites measured	35	136	496	678

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