Rolldown on new websites

1. Rolldown appeared on about 180 new sites in the last 30 days.^[1]
2. Nine in ten new Rolldown sites also use React.

The line is the 7-day average share of new sites that use Rolldown, since 26 September. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Vite	23.5%	98.1%
2	▲6	Rspack	0.1%	0.5%
3	▼1	pywb (Wayback Machine toolkit)	0.1%	0.3%
4	▼1	Instant.page	<0.1%	0.2%
5	▼2	Weglot	<0.1%	0.2%
6	–	Rack CORS	<0.1%	0.1%
7	▼3	Istio	<0.1%	0.1%
8	▼4	Adobe Flash (AC_RunActiveContent embed script)	<0.1%	0.1%
9	▲2	Google Apps Script	<0.1%	0.1%
10	▲3	VSCode for the Web	<0.1%	0.1%
11	–	Jam	<0.1%	0.1%
12	▲9	PartyKit	<0.1%	0.1%
…
21	▲77	Rolldown	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Developer Tools tool. Rolldown is typically used alongside Vite rather than instead of it. Among October launches it ranked #56 in Developer Tools, up from #133 in September. All 544 in Developer Tools

Tool	Sites with both	vs all new sites	Bar
Caddy	71	9.3x
React Router	92	5.8x
Google Tag Manager	73	2.6x
Vite	144	2.5x
Lucide Icons	93	2.4x

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

84 of the 244 sites using Rolldown are product launches we list individually. The other 160 are new business and personal sites: they count towards the figures above but are not listed here. A watch sends them to you.

Site	Found	Also detected
Wordwise — Vocabulary Routine Generator vocabroutine.com · Education	Nov 6
Mi Rimborso Facile — Gestione Rimborsi Spese mirimborsofacile.com	Nov 6
한바퀴 — 대학 시간표·출결·과제 관리 hanbakwi.xyz · South Korea	Nov 6
امتياز — دورة واحدة متكاملة للتحضير لامتحان العلاج الطبيعي imtaz.app	Nov 6
Nivoos — Tesis yönetimi platformu nivoos.com	Nov 6
WeConsent theweconsentapp.com · Developer Tools	Nov 6
Understand your LIM report before you buy · LIM Clarity app.limreport.co.nz · New Zealand	Nov 6
AideProf | Leçons, fiches et quiz pour les enseignants aideprof.fr · Productivity · France	Nov 6
feenstack | AI Automation for Financial Enterprises feenstack.com	Nov 6
Hochzeitsplaner und Eventseite für euer Fest · MOMEVI momevi.com · Switzerland	Nov 6
WheelPlaces wheelplaces.com	Nov 6
Linpulse — Your expertise. The right conversations. linpulse.ai · Marketing	Nov 6

Showing the most recent 12 of 84.

Watches, exports and the API give you all 244 sites using Rolldown, 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.