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Sites built with Underscore.js

JavaScript utility library providing functional helpers for collections, arrays and objects.

#201 of 951 in Javascript Library First seen: Jun 9, 2026 Last seen: Aug 28, 2026 Website: underscorejs.org
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20,887 sites

20,730 found by StackScope, 157 via launch platforms

StackScope Wider Web 20,680 StackScope Discovery (Indie) 50 Product Hunt 144 PeerPush 8 Other 3 Hacker News 2
  • StackScope Wider Web 20,680
  • StackScope Discovery (Indie) 50
  • Product Hunt 144
  • PeerPush 8
  • Other 3
  • Hacker News 2
View: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web
Last 7 days 1.3% +0.3pp
Most used with jQuery, WordPress, Google Tag Manager
Top product types E-commerce, Health, Education
Green hosting 57% vs 45% avg

Underscore.js has been detected on 20,887 launches we've crawled, with 15917 of those in August 2026 (1.1% of the month's launches so far). The 7-day rolling share is 1.3%, roughly steady week on week. Most recent detection: Millennium Airport Transfers, today.

It's most commonly paired with jQuery, WordPress, and Google Tag Manager. By product type, the launches using it are most often E-commerce (52%), Health (14%), and Education (7%). By estimated origin, India leads (40%), ahead of Iran (11%). By domain ending, launches using it are 8.7 times as likely as the average launch to live on a .store domain. The 153 scored launches using Underscore.js average a StackScope score of 6.5 out of 10, against 6.4 across all launches we score.

What kind of products ship with Underscore.js

5,392 launches

E-commerce
51.93%
Health
14.17%
Education
7.21%
Marketing
6.16%
Content
3.34%
Finance
3.13%
Productivity
3.10%
Games
2.67%
Social
2.23%
Design
2.21%
Developer Tools
1.80%
Hiring & HR
0.80%
Directory
0.67%
AI
0.50%
Crypto
0.09%

Domain endings using Underscore.js

20,890 sites

  • .com 58.04%
  • .in 12.60%
  • .store 4.42%
  • .online 3.49%
  • .uk 3.03%
  • .co 2.70%
  • .ca 1.77%
  • .site 1.70%
  • .org 1.66%
  • .xyz 1.49%
  • .us 1.40%
  • .net 1.16%
  • .de 0.63%
  • .au 0.58%
  • .ch 0.47%

Country

6,802 of 20,887 sites. Read from legal pages, company numbers and domain endings, so sites that publish none are missing and the US is undercounted.

  • India India 39.97%
  • Iran Iran 10.94%
  • United Kingdom United Kingdom 10.19%
  • Canada Canada 5.32%
  • United States United States 4.40%
  • Vietnam Vietnam 2.75%
  • China China 2.73%
  • Germany Germany 2.19%
  • France France 1.87%
  • Australia Australia 1.81%
  • New Zealand New Zealand 1.29%
  • Switzerland Switzerland 1.25%
  • Poland Poland 1.22%
  • Slovakia Slovakia 1.18%
  • Italy Italy 1.16%

Share of new sites using Underscore.js

Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.

1.3%
last 7 days
+0.3pp vs prior week
1.1%
August so far
15,917 of 1,436,717 sites
20,887
sites all time
since Jun 2026
Underscore.js daily detection trend Before 8 July 2026: launch platforms only. We began crawling the wider web on this date, so the cohort this share is measured against changes here. 5% 2% 0% Jul Aug Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery. Jun 2 · 0 / 934 = 0.0% Jun 3 · 0 / 714 = 0.0% Jun 4 · 0 / 599 = 0.0% Jun 5 · 0 / 581 = 0.0% Jun 6 · 0 / 436 = 0.0% Jun 7 · 0 / 404 = 0.0% Jun 8 · 0 / 515 = 0.0% Jun 9 · 1 / 876 = 0.1% Jun 10 · 5 / 722 = 0.7% Jun 11 · 3 / 577 = 0.5% Jun 12 · 1 / 449 = 0.2% Jun 13 · 3 / 380 = 0.8% Jun 14 · 1 / 345 = 0.3% Jun 15 · 2 / 532 = 0.4% Jun 16 · 5 / 1052 = 0.5% Jun 17 · 2 / 907 = 0.2% Jun 18 · 1 / 674 = 0.1% Jun 19 · 2 / 547 = 0.4% Jun 20 · 1 / 443 = 0.2% Jun 21 · 0 / 383 = 0.0% Jun 22 · 1 / 575 = 0.2% Jun 23 · 8 / 900 = 0.9% Jun 24 · 1 / 737 = 0.1% Jun 25 · 4 / 618 = 0.6% Jun 26 · 2 / 534 = 0.4% Jun 27 · 3 / 431 = 0.7% Jun 28 · 2 / 383 = 0.5% Jun 29 · 2 / 503 = 0.4% Jun 30 · 3 / 801 = 0.4% Jul 1 · 0 / 795 = 0.0% Jul 2 · 2 / 604 = 0.3% Jul 3 · 4 / 498 = 0.8% Jul 4 · 1 / 411 = 0.2% Jul 5 · 1 / 367 = 0.3% Jul 6 · 1 / 551 = 0.2% Jul 7 · 2 / 1171 = 0.2% Jul 8 · 45 / 12582 = 0.4% Jul 9 · 191 / 23735 = 0.8% Jul 10 · 173 / 22541 = 0.8% Jul 11 · 143 / 15974 = 0.9% Jul 12 · 142 / 20289 = 0.7% Jul 13 · 139 / 20911 = 0.7% Jul 14 · 160 / 20401 = 0.8% Jul 15 · 128 / 17227 = 0.7% Jul 16 · 77 / 14257 = 0.5% Jul 17 · 144 / 19719 = 0.7% Jul 18 · 199 / 22683 = 0.9% Jul 19 · 188 / 26052 = 0.7% Jul 20 · 169 / 22570 = 0.7% Jul 21 · 171 / 21636 = 0.8% Jul 22 · 185 / 23193 = 0.8% Jul 23 · 151 / 16857 = 0.9% Jul 24 · 77 / 12844 = 0.6% Jul 25 · 78 / 8944 = 0.9% Jul 26 · 150 / 19963 = 0.8% Jul 27 · 277 / 33844 = 0.8% Jul 28 · 384 / 38154 = 1.0% Jul 29 · 480 / 50000 = 1.0% Jul 30 · 433 / 43843 = 1.0% Jul 31 · 504 / 50953 = 1.0% Aug 1 · 492 / 50367 = 1.0% Aug 2 · 597 / 49618 = 1.2% Aug 3 · 513 / 48163 = 1.1% Aug 4 · 424 / 37288 = 1.1% Aug 5 · 377 / 32659 = 1.2% Aug 6 · 297 / 36535 = 0.8% Aug 7 · 287 / 37846 = 0.8% Aug 8 · 289 / 39638 = 0.7% Aug 9 · 230 / 34162 = 0.7% Aug 10 · 311 / 28777 = 1.1% Aug 11 · 256 / 31947 = 0.8% Aug 12 · 256 / 33418 = 0.8% Aug 13 · 427 / 49691 = 0.9% Aug 14 · 491 / 51266 = 1.0% Aug 15 · 570 / 51335 = 1.1% Aug 16 · 570 / 51614 = 1.1% Aug 17 · 421 / 41189 = 1.0% Aug 18 · 550 / 53748 = 1.0% Aug 19 · 449 / 49318 = 0.9% Aug 20 · 660 / 66612 = 1.0% Aug 21 · 969 / 90087 = 1.1% Aug 22 · 1217 / 91268 = 1.3% Aug 23 · 1267 / 89894 = 1.4% Aug 24 · 1025 / 78458 = 1.3% Aug 25 · 1112 / 68917 = 1.6% Aug 26 · 818 / 63854 = 1.3% Aug 27 · 1042 / 79048 = 1.3%
Jun 2, 2026 87 days Aug 27, 2026

The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.

How StackScope detects technologies

⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.

Javascript Library leaders

Tool % of launches % of category
#1 ▲1 jQuery 13.51% 34.22%
#2 ▼2 Motion 6.86% 17.37%
#3 ▲1 React Router 6.82% 17.28%
#4 – TanStack Router 4.13% 10.47%
#5 ▲5 Swiper 3.42% 8.65%
…
#201 Underscore.js Current page 0.01% 0.02%

Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Underscore.js is typically used alongside jQuery rather than instead of it. All 951 in Javascript Library →

Often used with

Tool Launches
jQuery 150
WordPress 149
Google Tag Manager 126
Google Analytics 124
Elementor 106

Tools most often detected on the same launches as Underscore.js.

Recent launches we can show

207 of the 20,887 sites using Underscore.js are product launches we list individually. The other 20,680 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works

Screenshot of Millennium Airport Transfers, a launch using Underscore.js Millennium Airport Transfers Aug 27, 2026 · score 5.2 United Kingdom Screenshot of Diamo, a launch using Underscore.js Diamo Aug 27, 2026 · score 5.0 United States Screenshot of Multi-Currency Business Account, a launch using Underscore.js Multi-Currency Business Account Aug 27, 2026 · score 7.6 United Kingdom Finance Screenshot of Netcreativemind, a launch using Underscore.js Netcreativemind Aug 27, 2026 · score 6.7 Marketing Screenshot of Top Tejados Zamora, a launch using Underscore.js Top Tejados Zamora Aug 27, 2026 · score 5.7 Screenshot of Pantsforbirds, a launch using Underscore.js Pantsforbirds Aug 26, 2026 · score 4.0 El Asesor AI Aug 26, 2026 AI Screenshot of Nimkro Hardware LLP , a launch using Underscore.js Nimkro Hardware LLP Aug 26, 2026 · score 5.2 Screenshot of Billionaire Bucks India, a launch using Underscore.js Billionaire Bucks India Aug 26, 2026 · score 5.5 India Screenshot of SensWear, a launch using Underscore.js SensWear Aug 25, 2026 · score 6.8 Finland Developer Tools Screenshot of Netcreativemind, a launch using Underscore.js Netcreativemind Aug 25, 2026 · score 6.2 Screenshot of Afsfireball, a launch using Underscore.js Afsfireball Aug 25, 2026 · score 7.6 India

Showing the most recent 12 of 207.

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