// javascript libraries

Websites that use YUI in 2026

We track 11,724 websites running YUI across 43 industries and 22 countries. Browse a sample of 100 matched company profiles below, each with industry, location, and verified contact data.

industries: 43
countries: 22
websites tracked: 11,724

Domain, industry and country per company

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Companies using YUI

Showing 25 of 100

Website	Company	Industry	HQ
calvin.edu	Calvin Universitycalvin.edu	Research Services	US
ufba.br	UFBA em Pautaufba.br	Higher Education	BR
usnwc.edu	Naval War Collegeusnwc.edu	Research Services	US
jackpedersenrealty.com	Jack Pedersen Realtyjackpedersenrealty.com	Real Estate	US
jonklein.com	JON KLEIN, P.A.jonklein.com		US
jal.co.jp	JAL SUNLIGHTjal.co.jp	Airlines and Aviation	US
joelwoophotography.com	JoelWoo.Photographyjoelwoophotography.com	Photography	US
jkhackl.com	JK Hackl Transportation Servicesjkhackl.com	Transportation, Logistics, Supply Chain and Storage	US
jeffkatzphotography.com	Jeff Katz Photographyjeffkatzphotography.com	Events Services	US
journeyzing.com	JourneyZingjourneyzing.com	Photography	US
jdelec.com.au	Jd Elecjdelec.com.au	Construction	AU
jacksoft.com.tw	JACKSOFT杰克商業自动化股份有限公司jacksoft.com.tw	Information Services	TW
krayola-kids.com	Krayola Kids Daycarekrayola-kids.com	Individual and Family Services	US
karisma.no	Karisma Senterkarisma.no	Civic and Social Organizations	NO
kospel.pl	Kospelkospel.pl	Electrical Equipment Manufacturing	PL
kingskleening.net	Kings Kleeningkingskleening.net	Facilities Services	US
kspu.ru	Krasnoyarsk State Pedagogical University named after V.P. Astafievakspu.ru	Higher Education	RU
ka.no	KA Employer organization for ecclesiastical enterpriseska.no	Political Organizations	NO
kingsgatere.com	KingsGate Realtykingsgatere.com	Real Estate	US
kingcord.com	Kingcord Industries Inc.kingcord.com		CA
kaiserwillys.com	Kaiser Willyskaiserwillys.com	Automotive	US
discipleshistory.org	DOC Historical Societydiscipleshistory.org	Non-profit Organizations	US
datajoe.com	DataJoe LLCdatajoe.com	publishing	US
dlsu.edu.ph	De La Salle Universitydlsu.edu.ph	Higher Education	PH
dogsforbetterlives.org	Dogs for Better Livesdogsforbetterlives.org	Non-profit Organizations	US

Refine to your ICP

Narrow these 100 companies down to the ones that match your ideal customer profile.

Revenue range Headcount Tech stack Funding stage Hiring signals Buyer intent Job title Location Founded year

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Industry breakdown

7 (7%)

Real Estate

7 (7%)

Higher Education

6 (6%)

Non-profit Organizations

5 (5%)

Media Production

5 (5%)

Research Services

How many websites use YUI?

We track 11,724 websites that use YUI in 2026. Those sites span 43 industries and 22 countries. The crawler re-checks each domain daily. So the count moves as sites adopt YUI or drop it.

YUI belongs to the JavaScript libraries category. Sites in that category tend to share a similar stack. As a result, they often share buying patterns too.

The table above shows a sample of 100 matched companies. Each row carries an industry, a country, and a live domain. You can search it, sort it, and export it.

Which industries use YUI most?

Adoption is not spread evenly. Instead, a few industries account for most of the matched sample:

Real Estate7.000000000000001%
Higher Education7.000000000000001%
Non-profit Organizations6%
Media Production5%
Research Services5%

Real Estate leads that list. However, the long tail matters just as much. Adoption reaches 43 industries in total. So you can narrow the list to the segment you sell into.

Where are websites that use YUI based?

The matched companies sit in 22 countries. These lead the sample:

United States 55
Australia 8
Brazil 6
Norway 5
Canada 5

United States is the largest single market in this sample. Because the country is stored per row, you can filter before you export. That keeps your outreach inside one timezone and one legal regime.

How to find websites that use YUI

Start with the table above. Then follow these four steps to turn it into an outreach list:

Filter the sample. Narrow by industry or country until the rows match your ideal customer profile.
Export the domains. Share the page to unlock the CSV, or sign in for the full dataset.
Find the people. Run each domain through Domain Search to pull every work email behind it.
Verify before you send. Pass the results through the Email Verifier so your bounce rate stays low.

Working at volume? Push the whole export through Bulk Tasks instead, or call the Domain Search API directly from your own stack.

Frequently asked questions

How many websites use YUI?

We track 11,724 websites that use YUI. The index refreshes daily, so the number shifts as sites adopt or drop it. Of those, 100 are matched to a company profile with industry, location, and contact data.

Can I download the list of websites that use YUI?

Yes. Share the page on LinkedIn to unlock a CSV export of the matched sample, with no signup required. For the full dataset and verified email addresses, create a free Tomba account.

Which industries use YUI the most?

Real Estate leads the matched sample, at 7.000000000000001% of companies. In total, websites that use YUI span 43 industries.

How fresh is the YUI data?

Our crawler re-checks technology signals daily. So a site that removes YUI drops out of the index, and a new adopter appears without you refreshing anything.

Can I get email addresses for websites that use YUI?

Yes. Every domain in the table can be enriched with verified work emails and direct phone numbers. Run a single domain through Domain Search, or push the whole export through Bulk Tasks.

// get this list by api

Companies using YUI, one request away

Filter the company search by technology, then find and verify the people at each company. The technology filter is available on paid plans; 50 companies per page.

01POST/reveal/searchCompanies that match a plain-language query or filters1 search credit 02GET/domain-searchThe email addresses at a company, with names, roles and the company profile1 search credit per 10 results 03GET/email-verifierWhether an address is deliverable: syntax, MX, SMTP, catch-all and greylisting checks1 verification credit

POST /reveal/search

curl -X POST "https://api.tomba.io/v1/reveal/search" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"filters":{"technologies":{"include":["YUI"]}},"page":1}'

const res = await fetch("https://api.tomba.io/v1/reveal/search", {
  method: "POST",
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({"filters":{"technologies":{"include":["YUI"]}},"page":1})
});
const { data } = await res.json(); // data.companies

import os, requests

res = requests.post(
    "https://api.tomba.io/v1/reveal/search",
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
    json={"filters":{"technologies":{"include":["YUI"]}},"page":1},
)
companies = res.json()["data"]["companies"]

// technologies

Other technologies to explore

Websites that use YUI in 2026

Download the 100 YUI customers

Companies using YUI

Refine to your ICP

Industry breakdown

How many websites use YUI?

Which industries use YUI most?

Where are websites that use YUI based?

How to find websites that use YUI

Frequently asked questions

Companies using YUI, one request away

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