Rack::Cache on new websites

1. Rack::Cache appeared on about 33 new sites in the last 30 days.^[1]
2. Nine in ten new Rack::Cache sites also use jQuery.

The line is the 7-day average share of new sites that use Rack::Cache, since 16 September. It starts at our first detection.

#	Movement	Tool	Share of all sites	Share of category	Bar
1	–	nginx	9.6%	37.4%
2	–	LiteSpeed Web Server	6.5%	25.4%
3	–	Apache	4.7%	18.4%
4	–	Caddy	3.1%	12.0%
5	–	OpenResty	0.9%	3.5%
6	–	Envoy	0.5%	1.8%
7	–	Microsoft IIS	0.4%	1.6%
8	–	Varnish	0.2%	0.6%
9	–	Uvicorn	0.1%	0.3%
10	–	Tengine	0.1%	0.3%
11	–	Phusion Passenger	<0.1%	0.2%
12	▲1	Kestrel	<0.1%	0.2%
…
46	▼20	Rack::Cache	<0.1%	<0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Server tool. Among September launches it ranked #74 in Server, down from #54 in August. All 155 in Server

Tool	Sites with both	vs all new sites	Bar
NationBuilder	35	114064x
Chartbeat	34	52088x
Twitter Widgets	30	567x
Rails	34	403x
Facebook SDK	31	395x

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

1 of the 38 sites using Rack::Cache are product launches we list individually. The other 37 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
Regulation Watch — Every federal regulation that matters, in plain English, before it bites. regulationwatch.ca · Canada	Oct 23

Watches, exports and the API give you all 38 sites using Rack::Cache, 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. We count a country only where it is stated plainly enough to be sure: a governing-law clause or company registration number on a legal page, a phone country code, or a country domain ending. Sites that publish none are not counted at all.