Websites Powered by Underscore.js
2,537,877 websites tracked using Underscore.js (JavaScript libraries) · underscorejs.org
Underscore.js is a JavaScript library used to add functionality to web pages. Its official site is underscorejs.org. PoweredBy tracks the websites that use Underscore.js across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the javascript libraries ecosystem.
Usage trend
250K
500K
750K
1M
Apr 2018
Jun 2020
Jul 2022
Sep 2024
Oct 2026
Domains observed using Underscore.js in each month's HTTP Archive crawl,
Apr 2018 to Oct 2026 · peak 933,578 in May 2024. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.4 s
INP 75 ms
CLS 0
TTFB 1300 ms
Median site among 794,329 Underscore.js sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
171,809
India
75,536
United Kingdom
65,350
Germany
62,310
Italy
58,817
Spain
55,403
France
54,908
Canada
46,607
Sites using Underscore.js by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Arts and entertainment | 25.74% | 13,306 |
| Pets and animals | 13.24% | 423 |
| Industrial and manufacturing | 11.13% | 569 |
| Beauty and wellness | 6.84% | 2,122 |
| Legal | 6.79% | 1,905 |
| Education | 6.67% | 4,204 |
| News and media | 5.92% | 2,913 |
| Non-profit and religious | 5.91% | 613 |
| Home and construction | 5.65% | 3,429 |
| Retail | 5.32% | 19,530 |
| Sports and fitness | 5.19% | 1,125 |
| Blogs and publishing | 4.71% | 1,362 |
Share of each industry's websites with a detected stack that use Underscore.js; industries come from what sites declare in their own structured data.
Top sites by authority
9+
25% · 92 of 372 sites
8+
19% · 1,459 of 7,677 sites
7+
12% · 5,311 of 45,712 sites
6+
9% · 9,721 of 110,136 sites
5+
7% · 16,647 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Underscore.js in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Underscore.js
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 5701 | spscommerce.com | 6.90/10 | 30,100 | 2,441 | Aug 2018 |
| 5702 | jackhenry.com | 6.90/10 | 15,100 | 3,140 | Apr 2020 |
| 5703 | dinnerbooking.com | 6.90/10 | 170 | 488 | Jul 2019 |
| 5704 | sierra.com | 6.90/10 | 403,400 | 177,200 | Oct 2026 |
| 5705 | firstalert4.com | 6.90/10 | 142,300 | 66,644 | Jan 2024 |
| 5706 | guidewire.com | 6.90/10 | 10,400 | 4,005 | Jan 2022 |
| 5707 | mayfirst.org | 6.90/10 | - | - | Jun 2020 |
| 5708 | cellebrite.com | 6.90/10 | 4,500 | 1,767 | Nov 2021 |
| 5709 | ibec.ie | 6.90/10 | 850 | 763 | Sep 2021 |
| 5710 | danariely.com | 6.90/10 | 2,400 | 168 | Jun 2021 |
| 5711 | mpa.gov.sg | 6.90/10 | 1,900 | 1,408 | Jun 2022 |
| 5712 | setneg.go.id | 6.90/10 | 360 | 487 | Oct 2021 |
| 5713 | cmb.ac.lk | 6.90/10 | 790 | 1,029 | Apr 2016 |
| 5714 | acer.org | 6.90/10 | 3,500 | 1,971 | Feb 2022 |
| 5715 | cumbria.ac.uk | 6.90/10 | 2,200 | 1,607 | Dec 2022 |
| 5716 | moenchengladbach.de | 6.90/10 | 110 | 244 | Jun 2017 |
| 5717 | ccf.org | 6.90/10 | 24 | 59 | May 2026 |
| 5718 | brasil247.com | 6.90/10 | 710 | 2,304 | Nov 2023 |
| 5719 | mediabiasfactcheck.com | 6.90/10 | 70,500 | 15,767 | Aug 2021 |
| 5720 | dom.edu | 6.90/10 | 50,200 | 7,102 | Oct 2022 |
| 5721 | hs-mannheim.de | 6.90/10 | 94 | 80 | Aug 2022 |
| 5722 | diputacionalicante.es | 6.90/10 | 96 | 151 | Mar 2021 |
| 5723 | worx.com | 6.90/10 | 211,000 | 22,231 | Mar 2020 |
| 5724 | city-adm.lviv.ua | 6.90/10 | 86 | 51 | Jun 2026 |
| 5725 | gustavus.edu | 6.90/10 | 20,000 | 11,346 | Oct 2026 |
| 5726 | ntpc.edu.tw | 6.90/10 | - | 2 | Jan 2022 |
| 5727 | metrolisboa.pt | 6.90/10 | 4,400 | 1,693 | Jun 2018 |
| 5728 | thesportsgeek.com | 6.90/10 | 20,600 | 19,829 | Aug 2026 |
| 5729 | messiah.edu | 6.90/10 | 29,900 | 10,168 | Aug 2018 |
| 5730 | pinacoteca.org.br | 6.90/10 | 67 | 234 | Aug 2026 |
| 5731 | sysmex.co.jp | 6.90/10 | 260 | 580 | Mar 2023 |
| 5732 | qab.co.jp | 6.90/10 | 10 | 66 | Oct 2025 |
| 5733 | uchceu.es | 6.90/10 | 190 | 543 | Oct 2021 |
| 5734 | tageswoche.ch | 6.90/10 | - | 2 | Nov 2017 |
| 5735 | stil.dk | 6.89/10 | 2 | 4 | Aug 2018 |
| 5736 | atypi.org | 6.89/10 | 100 | 116 | Jul 2026 |
| 5737 | catalisgov.com | 6.89/10 | 11,100 | 5,703 | Jan 2023 |
| 5738 | icdr.org | 6.89/10 | 2,600 | 263 | Mar 2020 |
| 5739 | youthline.co.nz | 6.89/10 | 3 | 12 | Oct 2022 |
| 5740 | matchinggifts.com | 6.89/10 | 46 | 119 | Aug 2025 |
| 5741 | comarch.com | 6.89/10 | 1,300 | 1,456 | Nov 2021 |
| 5742 | xatakamovil.com | 6.89/10 | 5,400 | 12,358 | Jun 2018 |
| 5743 | tweakyourbiz.com | 6.89/10 | 430 | 1,552 | Jan 2023 |
| 5744 | windtre.it | 6.89/10 | 2,900 | 1,219 | Sep 2021 |
| 5745 | igt.com | 6.89/10 | 13,600 | 9,461 | Apr 2020 |
| 5746 | volvotrucks.com | 6.89/10 | 16,500 | 4,037 | May 2023 |
| 5747 | philippineairlines.com | 6.89/10 | 233,300 | 11,905 | Dec 2025 |
| 5748 | extinctionrebellion.uk | 6.89/10 | 190 | 251 | Sep 2022 |
| 5749 | usfigureskating.org | 6.89/10 | 112,800 | 18,194 | Jan 2026 |
| 5750 | afcpe.org | 6.89/10 | 3,100 | 1,150 | Sep 2021 |
| 5751 | onmilwaukee.com | 6.89/10 | 103,700 | 67,806 | Oct 2020 |
| 5752 | bgetem.de | 6.89/10 | 42 | 48 | Jul 2021 |
| 5753 | mincultura.gov.co | 6.89/10 | 280 | 1,216 | Dec 2022 |
| 5754 | zurich.de | 6.89/10 | 73 | 203 | Oct 2019 |
| 5755 | thechicagoschool.edu | 6.89/10 | 28,700 | 8,500 | Apr 2024 |
| 5756 | uwrf.edu | 6.89/10 | 19,300 | 8,286 | Aug 2018 |
| 5757 | iafor.org | 6.89/10 | 650 | 642 | Nov 2025 |
| 5758 | wibw.com | 6.89/10 | 150,500 | 60,065 | Nov 2023 |
| 5759 | utalca.cl | 6.89/10 | 78 | 291 | Sep 2018 |
| 5760 | url.edu | 6.89/10 | 210 | 83 | May 2020 |
| 5761 | messynessychic.com | 6.89/10 | 24,600 | 13,808 | Aug 2026 |
| 5762 | xamk.fi | 6.89/10 | 100 | 174 | Sep 2021 |
| 5763 | sopot.pl | 6.89/10 | 24 | 39 | Jan 2019 |
| 5764 | uad.ac.id | 6.89/10 | 18 | 25 | Jan 2021 |
| 5765 | aaregistry.org | 6.89/10 | 144,400 | 37,905 | Apr 2026 |
| 5766 | laestrella.com.pa | 6.89/10 | 1,200 | 4,840 | Oct 2024 |
| 5767 | univ-catholille.fr | 6.89/10 | 380 | 122 | Jul 2020 |
| 5768 | puc-campinas.edu.br | 6.89/10 | 370 | 763 | Jul 2016 |
| 5769 | solaseedair.jp | 6.89/10 | 280 | 68 | Aug 2018 |
| 5770 | tomedo.de | 6.89/10 | - | - | Mar 2024 |
| 5771 | radiogdansk.pl | 6.89/10 | 140 | 327 | Oct 2026 |
| 5772 | rutgers.nl | 6.89/10 | 18 | 19 | Jul 2026 |
| 5773 | shiga-u.ac.jp | 6.89/10 | 3 | 8 | Jul 2021 |
| 5774 | cgn.ch | 6.89/10 | 580 | 479 | Jun 2018 |
| 5775 | oit.ac.jp | 6.89/10 | 120 | 62 | Apr 2025 |
| 5776 | uepb.edu.br | 6.89/10 | 93 | 186 | May 2020 |
| 5777 | lecanardenchaine.fr | 6.89/10 | 350 | 790 | May 2026 |
| 5778 | delmarva.com | 6.88/10 | 41,100 | 2,458 | Jun 2024 |
| 5779 | templately.com | 6.88/10 | 460 | 696 | Oct 2022 |
| 5780 | paradigmhq.org | 6.88/10 | 310 | 99 | Aug 2022 |
| 5781 | disneylatino.com | 6.88/10 | 4,400 | 5,031 | Jun 2018 |
| 5782 | astralinux.ru | 6.88/10 | 170 | 744 | Jan 2019 |
| 5783 | himssconference.com | 6.88/10 | 5,600 | 4,299 | Jul 2024 |
| 5784 | happiful.com | 6.88/10 | 8,100 | 6,702 | Dec 2024 |
| 5785 | iconplc.com | 6.88/10 | 46,200 | 4,884 | Feb 2019 |
| 5786 | y8.com | 6.88/10 | 51,800 | 26,676 | Aug 2018 |
| 5787 | hepper.com | 6.88/10 | 3,800 | 2,658 | Sep 2021 |
| 5788 | posthaven.com | 6.88/10 | 110 | 4 | Jun 2018 |
| 5789 | lh.or.kr | 6.88/10 | 110 | 21 | May 2021 |
| 5790 | econgood.org | 6.88/10 | 110 | 65 | Dec 2024 |
| 5791 | lincoln.com | 6.88/10 | 353,200 | 45,999 | Jun 2018 |
| 5792 | daltile.com | 6.88/10 | 145,100 | 81,104 | Aug 2018 |
| 5793 | sbcevents.com | 6.88/10 | 910 | 392 | Aug 2026 |
| 5794 | open-contracting.org | 6.88/10 | 3,100 | 203 | Jul 2019 |
| 5795 | dataport.de | 6.88/10 | 4 | 15 | Jul 2023 |
| 5796 | faro.com | 6.88/10 | 11,600 | 4,772 | Nov 2017 |
| 5797 | anxiety.org | 6.88/10 | 37 | 14 | Jan 2026 |
| 5798 | massdevice.com | 6.88/10 | 10,100 | 11,542 | Aug 2023 |
| 5799 | buybitcoinworldwide.com | 6.88/10 | 870 | 590 | May 2017 |
| 5800 | atlas.cern | 6.88/10 | 42,800 | 1,305 | Dec 2020 |
Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.
Download top 10,000 as CSV (zip) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).
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