Istanbul on new websites

1. Istanbul appeared on 9 new sites in the last 30 days.^[1]
2. Eight in ten new Istanbul sites also use React.

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

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	Vite	23.7%	98.3%
2	–	pywb (Wayback Machine toolkit)	0.1%	0.3%
3	▲1	Instant.page	0.1%	0.2%
4	▼1	Weglot	<0.1%	0.2%
5	▲2	Rack CORS	<0.1%	0.1%
…
44	▼3	Istanbul	<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. Istanbul is typically used alongside Vite rather than instead of it. Among September launches it ranked #37 in Developer Tools, down from #34 in August. All 506 in Developer Tools

Tool	Sites with both	vs all new sites	Bar
Stripe	38	75x
Squarespace	37	49x
Sentry	37	16x
Apache	37	16x
React Router	39	12x

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

3 of the 50 sites using Istanbul are product launches we list individually. The other 47 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
Fallow fallow.tools · Developer Tools	Sep 18
Camille – AI Personal Shopper for Shopify | Pinci merchant.pinci.ai · E-commerce	Sep 2
Vontra — quoting, invoicing & business management for UK tradespeople vontra.app	Aug 4

Watches, exports and the API give you all 50 sites using Istanbul, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.