JavaScript libraries
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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.
Disclaimer: The data used in this report is collected from the current VersionDB release (February 2026) containing a total of 12,727,168 domains. All statistics reflect this dataset and do not claim to represent all websites globally.
Underscore.js 1.9.1 Complementary Technologies
Technologies frequently found with Underscore.js 1.9.1.
Live Underscore.js 1.9.1 Sites
11
Complementary Tech
78
Most Frequent Complementary Tech
Websites Using Underscore.js 1.9.1
An unordered, non-ranked list generated from observed technology data.
| Domain | Server Location | ASN | Crawl Date |
|---|---|---|---|
| sovietfreestyle.com | 🇺🇸 United States | Hostinger International Limited | February 14, 2026 |
| aye-q.com | 🇺🇸 United States | Cloudflare London, LLC | February 14, 2026 |
| alliancesafetycouncil.org | 🇺🇸 United States | Fastly, Inc. | February 13, 2026 |
| jcbl.jp | 🇯🇵 Japan | SAKURA Internet Inc. | February 13, 2026 |
| bfbfoundation.org | 🇺🇸 United States | Cloudflare London, LLC | February 13, 2026 |
| quadlytics.com | 🇯🇵 Japan | GMO Internet Group, Inc. | February 13, 2026 |
| zielonyponton.pl | 🇵🇱 Poland | Cyber_Folks S.A. | February 8, 2026 |
| super-vaper.com | 🇯🇵 Japan | Xserver Inc. | February 8, 2026 |
| les-toques-blanches.fr | 🇫🇷 France | Groupe LWS SARL | February 8, 2026 |
| kyoto-senshoku.jp | 🇯🇵 Japan | Xserver Inc. | February 7, 2026 |
| open.kyoto | 🇯🇵 Japan | Xserver Inc. | February 7, 2026 |
Find Your Customers By Their Technologies
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Buy Now — $199.95 USDTop Underscore.js 1.9.1 Identifiers
Who is using Underscore.js 1.9.1 and where.
Countries
Top 5 most detected countries for Underscore.js 1.9.1
ASNs
Top 5 most detected ASNs for Underscore.js 1.9.1
Languages
Top 5 most detected Languages for Underscore.js 1.9.1
TLDs
Top 5 most detected TLDs for Underscore.js 1.9.1
Most Frequent Underscore.js 1.9.1 Identifiers and Complementary Tech
Most frequently encountered identifiers for Underscore.js 1.9.1 and its complementary technologies.
| Technology | Sites |
|---|---|
| WordPress | 11 |
| MySQL | 11 |
| jQuery | 11 |
| PHP | 11 |
| jQuery Migrate | 10 |
| Cloudflare | 9 |
| cdnjs | 7 |
| All in One SEO Pack | 6 |
| Popper | 6 |
| reCAPTCHA | 6 |
| All in One SEO | 6 |
| Moment.js | 5 |
| Contact Form 7 | 5 |
| Swiper | 5 |
| jsDelivr | 5 |
| Google Analytics | 4 |
| Nginx | 4 |
| Slick | 4 |
| Yoast SEO | 4 |
| jQuery UI | 3 |
| jQuery Modal | 3 |
| jQuery CDN | 3 |
| WooCommerce | 3 |
| HTTP/3 | 3 |
| Bootstrap | 3 |
| Elementor | 3 |
| Email Encoder for Wordpress | 2 |
| Site Kit | 2 |
| LiteSpeed | 2 |
| Breadcrumb NavXT | 2 |
| WP Engine | 2 |
| Lightbox | 2 |
| Font Awesome | 2 |
| Google Tag Manager | 2 |
| CookieYes | 2 |
| Cloudflare Bot Management | 2 |
| Tablesorter | 2 |
| FullCalendar | 2 |
| TypeScript | 2 |
| Apache HTTP Server | 1 |
| Jetpack | 1 |
| Essential Addons for Elementor | 1 |
| ZURB Foundation | 1 |
| Google Maps | 1 |
| Unpkg | 1 |
| imagesLoaded | 1 |
| Cookie Notice | 1 |
| Sassy Social Share | 1 |
| HSTS | 1 |
| Pantheon | 1 |
| Language | Sites |
|---|---|
| Japanese | 5 |
| English | 4 |
| French | 1 |
| Polish | 1 |
| Xhosa | 1 |
| ASN | Sites |
|---|---|
| Xserver Inc. | 3 |
| Cloudflare London, LLC | 2 |
| Fastly, Inc. | 1 |
| Cyber_Folks S.A. | 1 |
| SAKURA Internet Inc. | 1 |
| Hostinger International Limited | 1 |
| GMO Internet Group, Inc. | 1 |
| Groupe LWS SARL | 1 |
| TLD | Sites |
|---|---|
| com | 4 |
| jp | 2 |
| org | 2 |
| kyoto | 1 |
| fr | 1 |
| pl | 1 |
| Country | Sites |
|---|---|
| 🇯🇵 Japan | 5 |
| 🇺🇸 United States | 4 |
| 🇫🇷 France | 1 |
| 🇵🇱 Poland | 1 |