ContentBuilder.js on new websites

1. ContentBuilder.js appeared on about 63 new sites in the last 30 days.^[1]
2. Almost all new ContentBuilder.js sites also use Modernizr.

The line is the 7-day average share of new sites that use ContentBuilder.js, since 10 September.

#	Movement	Tool	Share of all sites	Share of category[3]	Bar
1	–	jQuery	14.1%	34.5%
2	–	React Router	6.6%	16.2%
3	–	Motion	6.0%	14.5%
4	–	TanStack Router	4.4%	10.8%
5	–	Swiper	3.4%	8.2%
…
279	▲42	ContentBuilder.js	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Javascript Library tool. Among September launches it ranked #254 in Javascript Library, up from #296 in August. All 1551 in Javascript Library

Tool	Sites with both	vs all new sites	Bar
Art Storefronts	210	25192x
jBox	210	15064x
Ahoy	210	4529x
New Relic	210	964x
Fly.io	209	673x

Tools that turn up far more often on ContentBuilder.js sites than on new sites in general, and how many times as common each one is there.

None of them is a product launch we list individually, so there is nothing to show here. They still count towards the figures above. How we find new sites

Watches, exports and the API give you all 213 sites using ContentBuilder.js, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
3. Some products people expect to see here are filed under a related category: UI Library.