Websites Powered by Underscore.js
2,493,242 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
May 2020
May 2022
Jun 2024
Jun 2026
Domains observed using Underscore.js in each month's HTTP Archive crawl,
Apr 2018 to Jun 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 806,790 Underscore.js sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
196,685
India
88,983
United Kingdom
74,584
Germany
71,501
France
65,402
Italy
65,347
Spain
60,653
Canada
53,918
Sites using Underscore.js by audience country, Chrome UX Report.
Top sites by authority
9+
26% · 95 of 372 sites
8+
20% · 1,522 of 7,677 sites
7+
12% · 5,613 of 45,712 sites
6+
9% · 10,308 of 110,136 sites
5+
7% · 17,596 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 |
|---|---|---|---|---|---|
| 1101 | hse.ie | 8.21/10 | 54,600 | 47,731 | Oct 2025 |
| 1102 | aa.com | 8.21/10 | 13,035,500 | 799,338 | Jan 2019 |
| 1103 | lacity.gov | 8.21/10 | 588,600 | 58,592 | Sep 2023 |
| 1104 | massgeneral.org | 8.21/10 | 499,200 | 151,425 | Aug 2022 |
| 1105 | nmsu.edu | 8.21/10 | 30,700 | 9,989 | Aug 2018 |
| 1106 | ucd.ie | 8.21/10 | 42,700 | 19,975 | Aug 2018 |
| 1107 | polito.it | 8.21/10 | 13,800 | 2,655 | Dec 2020 |
| 1108 | sorbonne-universite.fr | 8.21/10 | 10,200 | 3,852 | Jul 2020 |
| 1109 | bdc.ca | 8.21/10 | 181,200 | 44,189 | Jul 2022 |
| 1110 | uba.ar | 8.21/10 | 670 | 586 | Aug 2018 |
| 1111 | uc.pt | 8.21/10 | 3,500 | 1,118 | Dec 2022 |
| 1112 | wpcomstaging.com | 8.20/10 | - | - | Nov 2021 |
| 1113 | iqiyi.com | 8.20/10 | 52 | 311 | Aug 2018 |
| 1114 | lendingtree.com | 8.20/10 | 444,100 | 181,813 | Aug 2018 |
| 1115 | datev.de | 8.20/10 | 230 | 302 | Dec 2022 |
| 1116 | insead.edu | 8.20/10 | 9,800 | 8,169 | May 2018 |
| 1117 | bangkokpost.com | 8.20/10 | 22,600 | 24,747 | Nov 2023 |
| 1118 | reading.ac.uk | 8.20/10 | 15,100 | 12,029 | Aug 2018 |
| 1119 | southampton.ac.uk | 8.20/10 | 39,200 | 20,825 | Jun 2018 |
| 1120 | ens-lyon.fr | 8.20/10 | 2,800 | 1,148 | Nov 2021 |
| 1121 | tinkoff.ru | 8.19/10 | - | - | Aug 2022 |
| 1122 | edu.ru | 8.19/10 | 2 | 5 | Jan 2019 |
| 1123 | zscaler.com | 8.19/10 | 52,200 | 11,767 | Aug 2018 |
| 1124 | railway.app | 8.19/10 | - | - | Jan 2026 |
| 1125 | wbcsd.org | 8.19/10 | 4,000 | 3,570 | Jan 2019 |
| 1126 | scipy.org | 8.19/10 | 5,300 | 3,414 | Apr 2018 |
| 1127 | rub.de | 8.19/10 | - | - | May 2021 |
| 1128 | amtrak.com | 8.19/10 | 2,749,800 | 587,330 | Feb 2022 |
| 1129 | oprah.com | 8.19/10 | 290,600 | 108,227 | Jun 2018 |
| 1130 | tu-dortmund.de | 8.19/10 | 870 | 647 | Jan 2019 |
| 1131 | countryliving.com | 8.19/10 | 1,060,000 | 607,651 | Jun 2018 |
| 1132 | trust.org | 8.19/10 | 6,800 | 536 | Oct 2024 |
| 1133 | unl.pt | 8.19/10 | 480 | 245 | Jan 2019 |
| 1134 | uni-ulm.de | 8.19/10 | 2,700 | 1,858 | Aug 2022 |
| 1135 | uam.es | 8.19/10 | 910 | 1,945 | Aug 2018 |
| 1136 | saatchigallery.com | 8.18/10 | 4,800 | 1,840 | Jan 2022 |
| 1137 | dentsu.com | 8.18/10 | 8,500 | 4,218 | Dec 2020 |
| 1138 | getbento.com | 8.18/10 | 9,500 | 3,581 | Jun 2018 |
| 1139 | strategies.fr | 8.18/10 | 290 | 617 | Nov 2023 |
| 1140 | serpro.gov.br | 8.18/10 | 380 | 767 | Mar 2022 |
| 1141 | memberclicks.net | 8.18/10 | - | - | Apr 2018 |
| 1142 | sheknows.com | 8.18/10 | 379,500 | 323,748 | Jun 2018 |
| 1143 | mise.gov.it | 8.18/10 | 1 | 2 | Apr 2018 |
| 1144 | dimensions.ai | 8.18/10 | 8,600 | 2,156 | Dec 2022 |
| 1145 | tse.jus.br | 8.18/10 | 15,900 | 3,390 | May 2019 |
| 1146 | uni-saarland.de | 8.18/10 | 2,200 | 1,673 | Oct 2022 |
| 1147 | uni-konstanz.de | 8.18/10 | 2,100 | 1,030 | Aug 2022 |
| 1148 | latrobe.edu.au | 8.18/10 | 30,400 | 15,224 | Oct 2020 |
| 1149 | hslu.ch | 8.18/10 | 290 | 438 | Jun 2018 |
| 1150 | princehotels.co.jp | 8.18/10 | 1,200 | 496 | Sep 2021 |
| 1151 | parentzone.org.uk | 8.17/10 | 4,000 | 2,047 | Aug 2022 |
| 1152 | royalmail.com | 8.17/10 | 121,700 | 33,687 | Aug 2018 |
| 1153 | barnard.edu | 8.17/10 | 33,600 | 13,345 | Aug 2018 |
| 1154 | doctorsfile.jp | 8.17/10 | - | - | Jun 2021 |
| 1155 | eji.org | 8.17/10 | 89,500 | 24,576 | Oct 2023 |
| 1156 | otsuka.co.jp | 8.17/10 | 16,800 | 6,067 | Apr 2018 |
| 1157 | msf.org | 8.17/10 | 24,900 | 11,580 | Aug 2018 |
| 1158 | tennessean.com | 8.17/10 | 487,100 | 281,419 | Aug 2018 |
| 1159 | wral.com | 8.17/10 | 857,100 | 529,273 | Apr 2026 |
| 1160 | comunidad.madrid | 8.17/10 | 14,800 | 41,226 | Jul 2019 |
| 1161 | uni-potsdam.de | 8.17/10 | 1,100 | 2,058 | Aug 2022 |
| 1162 | pref.ibaraki.jp | 8.17/10 | 180 | 70 | Aug 2022 |
| 1163 | uni-halle.de | 8.17/10 | 650 | 112 | Dec 2022 |
| 1164 | navarra.es | 8.17/10 | 2,600 | 4,406 | Jan 2021 |
| 1165 | factcheck.org | 8.17/10 | 79,800 | 37,004 | Mar 2020 |
| 1166 | lublin.pl | 8.17/10 | 4 | 3 | Jan 2019 |
| 1167 | hiroshima-u.ac.jp | 8.17/10 | 7,800 | 648 | Mar 2021 |
| 1168 | titech.ac.jp | 8.17/10 | 2,400 | 817 | Jun 2020 |
| 1169 | 123formbuilder.com | 8.16/10 | 13,500 | 11,431 | May 2024 |
| 1170 | veeam.com | 8.16/10 | 23,200 | 17,141 | Jun 2018 |
| 1171 | shu.edu | 8.16/10 | 63,100 | 35,652 | Feb 2019 |
| 1172 | mercer.com | 8.16/10 | 42,700 | 19,528 | Aug 2022 |
| 1173 | informer.com | 8.16/10 | 33 | 13 | May 2020 |
| 1174 | afdb.org | 8.16/10 | 53,200 | 18,377 | Nov 2025 |
| 1175 | wfu.edu | 8.16/10 | 12,200 | 7,427 | Aug 2018 |
| 1176 | aemet.es | 8.16/10 | 15,000 | 24,125 | Jul 2020 |
| 1177 | calmatters.org | 8.16/10 | 485,400 | 164,851 | May 2020 |
| 1178 | umaine.edu | 8.16/10 | 180,800 | 43,670 | Apr 2018 |
| 1179 | midilibre.fr | 8.16/10 | 4,800 | 9,170 | Nov 2023 |
| 1180 | univ-lorraine.fr | 8.16/10 | 510 | 500 | Aug 2018 |
| 1181 | opensecrets.org | 8.16/10 | 275,900 | 70,874 | Jun 2018 |
| 1182 | daihatsu.co.jp | 8.15/10 | 41 | 78 | Jun 2020 |
| 1183 | rackspace.com | 8.15/10 | 35,900 | 5,344 | Oct 2020 |
| 1184 | jw.org | 8.15/10 | 520,400 | 371,965 | Jun 2018 |
| 1185 | manychat.com | 8.15/10 | 17,400 | 12,470 | Aug 2018 |
| 1186 | fff.fr | 8.15/10 | 5,100 | 2,624 | Sep 2020 |
| 1187 | g20.org | 8.15/10 | 18,000 | 11,741 | Jan 2022 |
| 1188 | technion.ac.il | 8.15/10 | 1,300 | 301 | Jun 2018 |
| 1189 | restaurant.org | 8.15/10 | 312,600 | 7,014 | May 2018 |
| 1190 | housebeautiful.com | 8.15/10 | 637,100 | 387,286 | Jun 2018 |
| 1191 | qub.ac.uk | 8.15/10 | 21,300 | 13,550 | Jan 2023 |
| 1192 | sussex.ac.uk | 8.15/10 | 94,900 | 22,419 | Apr 2020 |
| 1193 | pwc.de | 8.15/10 | 6,100 | 760 | Sep 2022 |
| 1194 | albany.edu | 8.15/10 | 166,200 | 60,210 | Apr 2018 |
| 1195 | aeroport.fr | 8.15/10 | 98 | 153 | Apr 2018 |
| 1196 | telkomuniversity.ac.id | 8.15/10 | 110 | 118 | Apr 2018 |
| 1197 | uma.es | 8.15/10 | 1,700 | 2,592 | Oct 2018 |
| 1198 | bootswatch.com | 8.14/10 | 2,800 | 1,907 | Jun 2026 |
| 1199 | corsair.com | 8.14/10 | 651,200 | 134,644 | Feb 2020 |
| 1200 | online.de | 8.14/10 | - | - | Jul 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) →
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