ReconnectingWebSocket on new websites

1. ReconnectingWebSocket appeared on about 180 new sites in the last 30 days.^[1]
2. Almost all new ReconnectingWebSocket sites also use PartyKit.

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

#	Movement	Tool	Share of all sites	Share of category[4]	Bar
1	–	jQuery	13.8%	34.3%
2	–	jQuery Migrate	7.6%	18.8%
3	–	React Router	6.5%	16.1%
4	▼1	Motion	5.7%	14.1%
5	▲1	TanStack Router	4.4%	11.0%
6	▼1	Swiper	3.3%	8.1%
7	▲1	ES Module Shims	2.9%	7.1%
8	–	js-cookie	2.5%	6.1%
9	▼1	Modernizr	2.3%	5.8%
10	▲1	GSAP	1.9%	4.7%
11	▲1	Lenis	1.4%	3.4%
12	▲3	Three.js	1.3%	3.2%
…
311	▼158	ReconnectingWebSocket	<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 October launches it ranked #800 in Javascript Library, down from #642 in September. All 1713 in Javascript Library

Tool	Sites with both	vs all new sites	Bar
PartyKit	206	6514x
uuid	206	4097x
Socket.IO	120	200x
Base44	206	90x
Render	203	59x

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

7 of the 223 sites using ReconnectingWebSocket are product launches we list individually. The other 216 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
Shipthis — Canada's shipping marketplace shipthis.ca · E-commerce · Canada	Nov 5
Hallcade — The arcade in your hallway hallcade.org	Nov 5
Flide | B2B Company Discovery and Sales Intelligence meetflide.com · Marketing	Nov 5
Cricket Scout Pulse cricket-scout-pulse.base44.app	Nov 5
NYROX — Encrypted Household Bill & Contract Management nyroxapp.com · Productivity	Nov 5
Flippy — Flip Tracker appflippy.com	Nov 4
FineTime.cc finetime.cc	Sep 10

Watches, exports and the API give you all 223 sites using ReconnectingWebSocket, from £15 a month.

1. These figures cover websites that went live since April 2026, not the web as a whole.
2. 4 November 2026: Detection widened: we now also find this technology inside a site's own scripts. Launches crawled before this date may undercount. The dashed line on the chart marks the day.
3. 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.
4. Some products people expect to see here are filed under a related category: UI Library.