Underscore.js icon

Websites using Underscore.js

JavaScript libraries Visit underscorejs.org

Underscore.js is a JavaScript library which provides utility functions for common programming tasks. It is comparable to features provided by Prototype.js and the Ruby language, but opts for a functional programming design instead of extending object prototypes.

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1.8M live Underscore.js sites, ready to export.

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

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Underscore.js companies in the United States

Every Underscore.js 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 Underscore.js sites by traffic

Start with the highest-traffic end of the dataset.

Sites on a .com domain

Limit results to Underscore.js websites on .com domains.

Companies with phone numbers

Only sites where an organisation phone number was found.

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Versions

Which Underscore.js versions are most used?

We could read a version number on 88% of Underscore.js sites. Of those, the most common are Underscore.js 1, on 1,630,629 sites and Underscore.js 0, on 19 sites.

100% on v1
Versions detected
2
Sites with a version
1,630,648
Share of sites by version
v1 100% v0 <1%
Live Websites

Websites Using Underscore.js

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

Open in the Lead List Exporter
DomainAlso runsCrawl Date
magazaonlinetienda.com
jQueryPHPMySQLHTTP/3WordPress
September 28, 2026
madish.in
jQueryPHPMySQLWordPressNginx
September 28, 2026
madamedessert.de
jQueryPHPMySQLWordPressNginx
September 28, 2026
madacc.org
jQueryPHPMySQLWordPressjQuery Migrate
September 28, 2026
macanasia88hebat.coupons
HTTP/3CloudflareCloudflare Browser InsightsGoogle MapsAMP
September 28, 2026
m77casino7.beer
jQueryPHPMySQLHTTP/3HSTS
September 28, 2026
jkautopecas.com
HTTP/3CloudflareCloudflare Browser InsightsGoogle MapsAMP
September 28, 2026
lynnfitho.com
jQueryPHPMySQLHTTP/3WordPress
September 28, 2026
luyacoffee.com
jQueryPHPMySQLWordPressNginx
September 28, 2026
luxus.com.co
jQueryPHPMySQLHTTP/3WordPress
September 28, 2026

How many websites use Underscore.js?

We found Underscore.js on 1,849,570 websites in our September 2026 crawl, across 226 countries.

Which countries use Underscore.js the most?

By number of websites, the top countries are United States (17%, 305,902 sites), Germany (9%, 171,685 sites), France (6%, 117,062 sites), United Kingdom (4%, 79,797 sites) and Italy (4%, 71,281 sites). Together they account for 40% of the 1,849,570 Underscore.js sites we track. 44% of the sites are in English, and .com is the most used domain ending, on 44% of them.

Where are Underscore.js websites hosted?

The networks carrying the most Underscore.js sites are Hostinger International Limited (227,084 sites), Cloudflare, Inc. (161,489 sites) and OVH SAS (87,361 sites).

What technologies are used with Underscore.js?

Across the 1,849,570 Underscore.js sites we track, the technologies most often found alongside it are jQuery (99%, 1,829,161 sites), PHP (97%, 1,791,714 sites), MySQL (96%, 1,766,445 sites), WordPress (95%, 1,765,273 sites) and jQuery Migrate (89%, 1,645,124 sites).

Deep Dive

Breakdown of Underscore.js websites

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

TechnologySites
jQuery1,829,161
PHP1,791,714
MySQL1,766,445
WordPress1,765,273
jQuery Migrate1,645,124
Elementor859,375
WooCommerce848,940
HTTP/3744,740
Yoast SEO686,821
Google Analytics654,966
Contact Form 7641,480
imagesLoaded565,836
Apache HTTP Server560,295
Bootstrap500,997
LiteSpeed468,646
Swiper440,485
Nginx416,045
WordPress Block Editor378,430
Magnific Popup375,325
Site Kit346,036
reCAPTCHA345,936
Slider Revolution324,193
Cloudflare319,593
Slick293,055
Font Awesome287,085
Same category

Other technologies in JavaScript libraries

JavaScript libraries technologies run on 57.54% of the websites we track. Underscore.js ranks #11 of 187, on 6.31% of JavaScript libraries sites.

All JavaScript libraries technologies

FAQ

Answers drawn from our latest crawl of Underscore.js websites. Anything else, email us and we will look it up.

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.