Websites using RackCache

Q: How current is this data?

The figures on this page come from our September 2026 crawl. VersionDB runs a fresh crawl every month, and the database spans multiple monthly crawls.

Q: Can I download a list of RackCache websites?

Yes. The Lead List Exporter lets you filter the 27,382 RackCache sites by country, traffic and contact details, see the row count for free, and pay once for the rows you export. To try it first, the Free Lead List Exporter exports up to 10 matching domains at no cost, from a subset of our crawl.

Caching

RackCache is a quick drop-in component to enable HTTP caching for Rack-based applications.

Lead List Exporter

27.3k live RackCache sites, ready to export.

That's how many RackCache websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

Pick a ready-made template, or build your own filters in the Lead List Exporter and pay only for the rows you export.

Open the Lead List Exporter

Just need a few domains? Export up to 10 free from a subset of our crawl.

Start with a list template

RackCache companies in the United States

Every RackCache website we detected in the United States.

Companies with personnel emails

Only sites where a personal, company-hosted email was found.

Decision makers on LinkedIn

Sites with at least one personnel LinkedIn profile.

Top 100,000 RackCache sites by traffic

Start with the highest-traffic end of the dataset.

Sites on a .com domain

Limit results to RackCache websites on .com domains.

Companies with phone numbers

Only sites where an organisation phone number was found.

Create your own

Live Websites

Websites Using RackCache

A sample of live RackCache sites from our latest crawl, with the other technologies each one runs.

Open in the Lead List Exporter

Domain	Also runs	Crawl Date
kento-yamazaki.com	Nginx Google Analytics Google Tag Manager Ruby Ruby on Rails	September 27, 2026
kazuki-watanabe.com	Nginx Google Analytics Google Tag Manager reCAPTCHA Ruby	September 27, 2026
kawaisouni.jp	Nginx Google Analytics Google Tag Manager reCAPTCHA Ruby	September 27, 2026
jellysportshop.com	HSTS Google Analytics Ruby Ruby on Rails	September 27, 2026
impresa8108.it	jQuery Nginx Bootstrap Google Tag Manager Google Hosted Libraries	September 27, 2026
henecia.jp	Nginx Google Analytics Google Tag Manager reCAPTCHA YouTube	September 27, 2026
ghbass.co.za	Nginx Bootstrap Google Analytics Google Tag Manager reCAPTCHA	September 27, 2026
gbmarukin.com	Nginx Google Analytics Google Tag Manager Ruby Twitter	September 27, 2026
clutchcycles.com	HTTP/3 HSTS Cloudflare Google Analytics Cloudflare Browser Insights	September 27, 2026
calgaryminorsoccer.com	Bootstrap Google Analytics Adobe Fonts Typekit Ruby	September 27, 2026

How many websites use RackCache?

We found RackCache on 27,382 websites in our September 2026 crawl, across 89 countries.

Which countries use RackCache the most?

By number of websites, the top countries are United States (12%, 3,298 sites), Japan (7%, 1,812 sites), Taiwan (6%, 1,578 sites), Canada (5%, 1,350 sites) and Germany (4%, 1,144 sites). Together they account for 34% of the 27,382 RackCache sites we track. 65% of the sites are in English, and .com is the most used domain ending, on 59% of them.

Where are RackCache websites hosted?

The networks carrying the most RackCache sites are Cloudflare, Inc. (14,828 sites), Amazon.com, Inc. (5,834 sites) and Hetzner Online GmbH (1,095 sites).

What technologies are used with RackCache?

Across the 27,382 RackCache sites we track, the technologies most often found alongside it are Ruby (100%, 27,382 sites), Cloudflare (61%, 16,618 sites), Cloudflare Browser Insights (56%, 15,321 sites), Ruby on Rails (50%, 13,809 sites) and Cloudflare Bot Management (43%, 11,835 sites).

Deep Dive

Breakdown of RackCache websites

What else they run, plus their language, hosting network, domain extension and country.

Technology	Sites
Ruby	27,382
Cloudflare	16,618
Cloudflare Browser Insights	15,321
Ruby on Rails	13,809
Cloudflare Bot Management	11,835
Stripe	11,454
Recurly	11,011
Google Analytics	10,629
HSTS	9,761
Mailcheck	7,600
HTTP/3	7,262
Google Tag Manager	6,369
jQuery	5,572
Bootstrap	4,020
Nginx	3,830
YouTube	3,550
reCAPTCHA	2,523
Stimulus	2,504
Phusion Passenger	2,476
Font Awesome	2,432
cdnjs	2,273
Varnish	1,753
Section.io	1,611
Apache HTTP Server	1,399
Popper	1,089

Language	Sites
English	17,686
Chinese	2,606
German	896
French	834
Japanese	800
Dutch	531
Indonesian	513
Spanish	489
Swedish	437
Italian	260
Latin	238
Portuguese	167
Russian	162
Norwegian Bokmål	144
Finnish	112
Danish	100
Tagalog	100
Polish	93
Welsh	59
Afrikaans	57
Māori	54
Esperanto	52
Czech	51
Norwegian Nynorsk	43
Romanian	43

ASN	Sites
Cloudflare, Inc.	14,828
Amazon.com, Inc.	5,834
Hetzner Online GmbH	1,095
Level 3 Parent, LLC	952
CLOUDFLARENET	753
Akamai Connected Cloud	585
DigitalOcean, LLC	522
OVH SAS	311
RIMU HOSTING LIMITED	193
Rackspace Hosting	180
Data Communication Business Group	146
Google LLC	141
Fastly, Inc.	107
Cloudflare London, LLC	93
AMAZON-02	60
Microsoft Corporation	58
Real Page, Inc.	46
SAKURA Internet Inc.	42
IONOS SE	40
ODERLAND Webbhotell AB	32
Aktivnie Tehnologii LLC	31
SQUIXA PTY LIMITED	30
Scaleway SAS	30
BUNNYWAY, informacijske storitve d.o.o.	29
Host Europe GmbH	29

TLD	Sites
com	16,282
org	1,952
tw	1,529
ca	997
de	665
net	623
se	430
au	402
be	381
uk	366
nz	275
jp	272
fr	235
co	208
io	142
nl	139
info	129
ru	118
it	109
fi	103
no	99
br	93
ch	91
eu	79
pl	79

Country	Sites
Unknown	13,850
🇺🇸 United States	3,298
🇯🇵 Japan	1,812
🇹🇼 Taiwan	1,578
🇨🇦 Canada	1,350
🇩🇪 Germany	1,144
🇸🇪 Sweden	469
🇬🇧 United Kingdom	468
🇦🇺 Australia	424
🇧🇪 Belgium	399
🇫🇷 France	399
🇳🇿 New Zealand	279
🇳🇱 Netherlands	186
🇷🇺 Russia	148
🇫🇮 Finland	143
🇮🇹 Italy	134
🇪🇸 Spain	109
🇨🇭 Switzerland	107
🇳🇴 Norway	105
🇧🇷 Brazil	98
🇮🇳 India	84
🇵🇱 Poland	84
🇩🇰 Denmark	73
🇨🇿 Czech Republic	55
🇦🇹 Austria	50