Websites Powered by Underscore.js
2,514,547 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
Jun 2022
Jul 2024
Aug 2026
Domains observed using Underscore.js in each month's HTTP Archive crawl,
Apr 2018 to Aug 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 793,689 Underscore.js sites with Chrome UX data, p75 values, Aug 2026.
Top countries
United States
174,846
India
77,587
United Kingdom
65,581
Germany
63,127
Italy
56,155
France
54,266
Spain
51,985
Canada
46,748
Sites using Underscore.js by audience country, Chrome UX Report.
Top sites by authority
9+
25% · 93 of 372 sites
8+
20% · 1,502 of 7,677 sites
7+
12% · 5,508 of 45,712 sites
6+
9% · 10,080 of 110,136 sites
5+
7% · 17,232 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 |
|---|---|---|---|---|---|
| 901 | hokudai.ac.jp | 8.30/10 | 390 | 19 | May 2019 |
| 902 | nttdata.com | 8.29/10 | 8,000 | 8,505 | Sep 2022 |
| 903 | service-now.com | 8.29/10 | - | - | Apr 2019 |
| 904 | arm.com | 8.29/10 | 171,800 | 8,174 | Jul 2020 |
| 905 | udc.es | 8.29/10 | 280 | 628 | Jan 2021 |
| 906 | univ-tours.fr | 8.29/10 | 140 | 358 | Sep 2018 |
| 907 | study.com | 8.29/10 | 8,800,400 | 2,896,548 | Jun 2018 |
| 908 | cuhk.edu.hk | 8.29/10 | 5,100 | 1,878 | Aug 2018 |
| 909 | indiewire.com | 8.29/10 | 728,400 | 293,806 | Jun 2018 |
| 910 | nm.gov | 8.29/10 | 34,700 | 5,251 | Oct 2022 |
| 911 | mountsinai.org | 8.29/10 | 1,760,200 | 565,294 | Apr 2019 |
| 912 | concordia.ca | 8.29/10 | 44,000 | 27,103 | Jan 2023 |
| 913 | rpi.edu | 8.29/10 | 48,000 | 6,018 | Aug 2018 |
| 914 | ncaa.com | 8.28/10 | 6,489,100 | 711,917 | Sep 2018 |
| 915 | instacart.com | 8.28/10 | 8,806,100 | 1,907,199 | Jun 2018 |
| 916 | stuttgart.de | 8.28/10 | 6,500 | 2,016 | Nov 2021 |
| 917 | rarediseases.org | 8.28/10 | 418,300 | 61,592 | Apr 2018 |
| 918 | complex.com | 8.28/10 | 808,300 | 434,139 | Jun 2018 |
| 919 | elespanol.com | 8.28/10 | 27,000 | 97,909 | Dec 2022 |
| 920 | icao.int | 8.28/10 | 38,400 | 10,708 | Aug 2018 |
| 921 | jma.or.jp | 8.28/10 | 24 | 46 | Oct 2020 |
| 922 | umanitoba.ca | 8.28/10 | 25,600 | 17,260 | Jan 2019 |
| 923 | oscars.org | 8.28/10 | 575,800 | 48,741 | Aug 2022 |
| 924 | auburn.edu | 8.28/10 | 270,500 | 32,835 | Aug 2018 |
| 925 | universityofcalifornia.edu | 8.28/10 | 204,600 | 56,692 | Jun 2018 |
| 926 | unu.edu | 8.28/10 | 16,800 | 5,872 | Jun 2021 |
| 927 | tsukuba.ac.jp | 8.28/10 | 1,800 | 517 | Aug 2018 |
| 928 | kyushu-u.ac.jp | 8.28/10 | 680 | 731 | Jan 2022 |
| 929 | infoseek.co.jp | 8.28/10 | 53 | 10 | Aug 2018 |
| 930 | firebaseapp.com | 8.27/10 | - | - | Aug 2018 |
| 931 | teespring.com | 8.27/10 | 9,400 | 4,400 | Jun 2018 |
| 932 | marketingprofs.com | 8.27/10 | 13,400 | 13,125 | Sep 2021 |
| 933 | thermofisher.com | 8.27/10 | 1,077,200 | 197,459 | Apr 2018 |
| 934 | com.ru | 8.27/10 | - | - | Jun 2018 |
| 935 | capitalone.com | 8.27/10 | 7,178,700 | 848,197 | Jun 2018 |
| 936 | iit.edu | 8.27/10 | 80,800 | 30,957 | Aug 2018 |
| 937 | blackrock.com | 8.27/10 | 250,300 | 67,050 | Jan 2019 |
| 938 | ubs.com | 8.27/10 | 127,200 | 56,066 | Aug 2018 |
| 939 | unitn.it | 8.27/10 | 1,600 | 1,402 | Jun 2020 |
| 940 | jcu.edu.au | 8.27/10 | 14,300 | 10,995 | Oct 2022 |
| 941 | jsonline.com | 8.27/10 | 1,295,400 | 326,927 | Aug 2018 |
| 942 | vrt.be | 8.27/10 | 16,600 | 11,968 | May 2022 |
| 943 | realestate.com.au | 8.27/10 | 269,000 | 197,093 | Jun 2018 |
| 944 | stonybrook.edu | 8.27/10 | 351,000 | 92,449 | Aug 2018 |
| 945 | oebb.at | 8.27/10 | 9,300 | 9,230 | Oct 2020 |
| 946 | upc.edu | 8.27/10 | 1,400 | 1,502 | Jun 2018 |
| 947 | auvergnerhonealpes.fr | 8.27/10 | 380 | 482 | Sep 2022 |
| 948 | amnh.org | 8.27/10 | 1,096,500 | 135,384 | Jun 2018 |
| 949 | ou.edu | 8.27/10 | 382,900 | 71,501 | Aug 2018 |
| 950 | ig.com.br | 8.27/10 | 17 | 58 | Mar 2019 |
| 951 | phila.gov | 8.27/10 | 643,900 | 199,195 | Aug 2018 |
| 952 | fiocruz.br | 8.27/10 | 500 | 722 | Aug 2018 |
| 953 | nikkan.co.jp | 8.27/10 | 40 | 363 | Jun 2021 |
| 954 | waseda.jp | 8.27/10 | 13,200 | 3,964 | Jan 2021 |
| 955 | sony.jp | 8.27/10 | 1,000 | 2,568 | Jun 2018 |
| 956 | ua.es | 8.27/10 | 130 | 216 | Aug 2018 |
| 957 | highspot.com | 8.26/10 | 12,100 | 4,947 | Jun 2018 |
| 958 | gb.net | 8.26/10 | - | 1 | Jun 2025 |
| 959 | nextcloud.com | 8.26/10 | 19,300 | 20,828 | Aug 2022 |
| 960 | overdrive.com | 8.26/10 | 130,100 | 98,935 | Jun 2018 |
| 961 | pen.org | 8.26/10 | 86,900 | 25,482 | Jun 2018 |
| 962 | cwi.nl | 8.26/10 | 1,200 | 631 | Jun 2018 |
| 963 | act.org | 8.26/10 | 531,600 | 88,851 | Aug 2018 |
| 964 | digg.se | 8.26/10 | 87 | 61 | May 2024 |
| 965 | charite.de | 8.26/10 | 600 | 676 | Jun 2018 |
| 966 | rnd.de | 8.26/10 | 1,800 | 5,277 | Apr 2020 |
| 967 | uni-wuerzburg.de | 8.26/10 | 1,900 | 1,383 | Jan 2023 |
| 968 | businessinsider.de | 8.26/10 | 1,100 | 3,475 | Jan 2025 |
| 969 | barcelona.cat | 8.26/10 | 18,300 | 7,599 | Apr 2020 |
| 970 | uark.edu | 8.26/10 | 90,000 | 9,143 | Aug 2018 |
| 971 | unlv.edu | 8.26/10 | 319,800 | 86,297 | Aug 2020 |
| 972 | camera.it | 8.26/10 | 180 | 596 | Jan 2021 |
| 973 | chop.edu | 8.26/10 | 1,318,800 | 212,894 | Aug 2018 |
| 974 | unistra.fr | 8.26/10 | 1,500 | 1,386 | Aug 2018 |
| 975 | um.es | 8.26/10 | 7,100 | 7,111 | Sep 2022 |
| 976 | suzuri.jp | 8.26/10 | 110 | 204 | Jun 2018 |
| 977 | art.pl | 8.26/10 | - | - | Jan 2019 |
| 978 | websitedemos.net | 8.25/10 | 23 | 155 | Feb 2019 |
| 979 | loopia.se | 8.25/10 | 130 | 49 | Jun 2018 |
| 980 | hse.ru | 8.25/10 | 1,500 | 2,325 | Dec 2018 |
| 981 | nielseniq.com | 8.25/10 | 13,900 | 12,225 | Jan 2021 |
| 982 | confluent.io | 8.25/10 | 78,000 | 5,981 | Aug 2018 |
| 983 | vse.cz | 8.25/10 | 320 | 216 | Apr 2023 |
| 984 | haz.de | 8.25/10 | 560 | 1,377 | Jan 2019 |
| 985 | aon.com | 8.25/10 | 41,100 | 22,888 | Aug 2018 |
| 986 | utep.edu | 8.25/10 | 188,700 | 63,230 | Jan 2019 |
| 987 | bloomerang.co | 8.25/10 | 1,300 | 537 | Oct 2024 |
| 988 | lockheedmartin.com | 8.25/10 | 869,600 | 98,991 | Jun 2018 |
| 989 | conference-board.org | 8.25/10 | 60,100 | 35,792 | Apr 2018 |
| 990 | tugraz.at | 8.25/10 | 1,400 | 989 | Aug 2018 |
| 991 | nahb.org | 8.25/10 | 97,900 | 32,327 | Apr 2020 |
| 992 | scotsman.com | 8.25/10 | 134,000 | 79,200 | Oct 2023 |
| 993 | euskadi.eus | 8.25/10 | 42,700 | 10,687 | Jul 2020 |
| 994 | scu.edu | 8.25/10 | 182,300 | 59,213 | Jan 2019 |
| 995 | uni-kiel.de | 8.25/10 | 1,300 | 766 | Aug 2018 |
| 996 | peta.org | 8.25/10 | 234,400 | 99,026 | Aug 2018 |
| 997 | floridahealth.gov | 8.25/10 | 345,400 | 156,641 | Jan 2026 |
| 998 | ulisboa.pt | 8.25/10 | 6,100 | 1,009 | Aug 2018 |
| 999 | nwf.org | 8.25/10 | 917,800 | 72,616 | Oct 2020 |
| 1000 | unito.it | 8.25/10 | 630 | 627 | Aug 2018 |
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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