// javascript libraries
Websites that use Underscore.js in 2026
We track 1,766,922 websites running Underscore.js across 52 industries and 28 countries. Browse a sample of 100 matched company profiles below, each with industry, location, and verified contact data.
- industries
- 52
- countries
- 28
- websites tracked
- 1,766,922
Download the 100 Underscore.js customers
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Free instant access · 100 verified Underscore.js customers
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Companies using Underscore.js
Showing 25 of 100
| Website | Company | Industry | HQ |
|---|---|---|---|
| camthorne.co.uk | Mechanical or Industrial Engineering |  GB | |
| contractfurniture.com | Furniture |  US | |
| cacci.cc | Individual and Family Services | US | |
| cs-advertising.com | Hospitality | US | |
| ccww.co.uk | Telecommunications | GB | |
| cocinarte.edu.mx | Higher Education |  MX | |
| coventry.ac.uk | Education Management | GB | |
| counselingsupportservices.com | Individual and Family Services | US | |
| cadsolid.pt | Information Technology and Services |  PT | |
| cancelcancerafrica.org | Civic and Social Organizations | GB | |
| crises-experts.com | Operations Consulting |  FR | |
| wallbedsbywilding.com | Furniture | US | |
| coachesaid.com | Media Production | US | |
| corixpartners.com | Operations Consulting | GB | |
| consultingheads.com | Information Technology and Services |  DE | |
| conavicoop.cl | Real Estate |  CL | |
| condax.com.br | Telecommunications |  BR | |
| carpathia.ch | Information Technology and Services |  CH | |
| covecaygolf.com | Recreational Facilities | US | |
| cauchoval.cl | Mining | CL | |
| cyanotec.com | Chemical Manufacturing | GB | |
| capa.co.jp |  JP | ||
| servicedecalculatoare.ro | Computer Hardware |  RO | |
| lindajewellers.com | Retail |  AU | |
| cadlearning.com | Information Services | US |
Refine to your ICP
Narrow these 100 companies down to the ones that match your ideal customer profile.
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Industry breakdown
How many websites use Underscore.js?
We track 1,766,922 websites that use Underscore.js in 2026. Those sites span 52 industries and 28 countries. The crawler re-checks each domain daily. So the count moves as sites adopt Underscore.js or drop it.
Underscore.js 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 Underscore.js most?
Adoption is not spread evenly. Instead, a few industries account for most of the matched sample:
- Information Technology and Services7.000000000000001%
- Real Estate7.000000000000001%
- Religious Institutions6%
- Operations Consulting4%
- Marketing Services3%
Information Technology and Services leads that list. However, the long tail matters just as much. Adoption reaches 52 industries in total. So you can narrow the list to the segment you sell into.
Where are websites that use Underscore.js based?
The matched companies sit in 28 countries. These lead the sample:
- United States 48
- United Kingdom 9
- Brazil 6
- Australia 4
- Canada 4
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 Underscore.js
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 Underscore.js?
We track 1,766,922 websites that use Underscore.js. 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 Underscore.js?
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 Underscore.js the most?
Information Technology and Services leads the matched sample, at 7.000000000000001% of companies. In total, websites that use Underscore.js span 52 industries.
How fresh is the Underscore.js data?
Our crawler re-checks technology signals daily. So a site that removes Underscore.js drops out of the index, and a new adopter appears without you refreshing anything.
Can I get email addresses for websites that use Underscore.js?
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 Underscore.js, 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.
/reveal/searchCompanies that match a plain-language query or filters1 search credit02GET/domain-searchThe email addresses at a company, with names, roles and the company profile1 search credit per 10 results03GET/email-verifierWhether an address is deliverable: syntax, MX, SMTP, catch-all and greylisting checks1 verification creditcurl -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":["Underscore.js"]}},"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":["Underscore.js"]}},"page":1})
});
const { data } = await res.json(); // data.companiesimport 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":["Underscore.js"]}},"page":1},
)
companies = res.json()["data"]["companies"]// technologies
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