Websites Powered by Prototype
168,279 websites tracked using Prototype (JavaScript frameworks) · www.prototypejs.org
Prototype is a JavaScript framework for building interactive web applications. Its official site is prototypejs.org. PoweredBy tracks the websites that use Prototype across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the javascript frameworks ecosystem.
Usage trend
20K
40K
60K
80K
Apr 2018
May 2020
Jul 2022
Aug 2024
Sep 2026
Domains observed using Prototype in each month's HTTP Archive crawl,
Apr 2018 to Sep 2026 · peak 75,529 in May 2019. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.7 s
INP 75 ms
CLS 0
TTFB 700 ms
Median site among 51,977 Prototype sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
13,806
Germany
12,443
United Kingdom
6,523
India
6,084
France
6,076
Japan
5,759
Netherlands
5,533
Spain
5,465
Sites using Prototype by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Education | 0.42% | 207 |
| Government | 0.32% | 26 |
| Industrial and manufacturing | 0.21% | 9 |
| Arts and entertainment | 0.18% | 74 |
| Retail | 0.16% | 486 |
| Non-profit and religious | 0.14% | 11 |
| Finance and insurance | 0.10% | 16 |
| Blogs and publishing | 0.08% | 19 |
| Pets and animals | 0.07% | 2 |
| News and media | 0.07% | 30 |
| Sports and fitness | 0.07% | 11 |
| Travel and hospitality | 0.06% | 46 |
Share of each industry's websites with a detected stack that use Prototype; industries come from what sites declare in their own structured data.
Top sites by authority
9+
6% · 22 of 372 sites
8+
5% · 347 of 7,677 sites
7+
2% · 979 of 45,712 sites
6+
1% · 1,577 of 110,136 sites
5+
<1% · 2,335 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Prototype in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Prototype
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | Aug 2018 |
| 2 | github.io | 9.43/10 | 1,800 | 1 | Jun 2020 |
| 3 | blogspot.com | 9.39/10 | - | - | Jan 2016 |
| 4 | qq.com | 9.34/10 | 2,200 | 163 | Aug 2018 |
| 5 | washingtonpost.com | 9.26/10 | 2,034,200 | 1,255,983 | Aug 2018 |
| 6 | weebly.com | 9.24/10 | 162,400 | 11,089 | May 2017 |
| 7 | bund.de | 9.23/10 | - | - | Feb 2020 |
| 8 | stanford.edu | 9.19/10 | 3,302,700 | 5,160 | Aug 2018 |
| 9 | mit.edu | 9.18/10 | 163,800 | 31,239 | Aug 2018 |
| 10 | nature.com | 9.13/10 | 4,250,400 | 2,211,060 | Aug 2018 |
| 11 | berkeley.edu | 9.10/10 | 166,700 | 4,721 | Aug 2018 |
| 12 | noaa.gov | 9.07/10 | 1,233,000 | 125,205 | Aug 2018 |
| 13 | vercel.app | 9.05/10 | - | - | Dec 2022 |
| 14 | free.fr | 9.05/10 | 3,400 | 1,262 | Aug 2018 |
| 15 | iubenda.com | 9.04/10 | 57,400 | 7,828 | Jun 2020 |
| 16 | bizjournals.com | 9.04/10 | 803,700 | 750,107 | Apr 2026 |
| 17 | telegraph.co.uk | 9.04/10 | 700,500 | 680,508 | Jul 2023 |
| 18 | dhs.gov | 9.02/10 | 1,491,300 | 252,017 | Oct 2018 |
| 19 | columbia.edu | 9.02/10 | 768,900 | 38,656 | Aug 2018 |
| 20 | leadconnectorhq.com | 9.01/10 | 220 | 108 | Sep 2023 |
| 21 | pbs.org | 9.01/10 | 10,249,900 | 1,835,809 | Aug 2018 |
| 22 | uk.com | 9.00/10 | 2 | 12 | Jan 2016 |
| 23 | naver.com | 8.99/10 | 47,500 | 134 | Aug 2018 |
| 24 | nsw.gov.au | 8.95/10 | 75,300 | 73,181 | Aug 2018 |
| 25 | sakura.ne.jp | 8.95/10 | - | - | Aug 2018 |
| 26 | sohu.com | 8.94/10 | 2,600 | 4,792 | Aug 2018 |
| 27 | ucla.edu | 8.93/10 | 410,700 | 13,782 | Aug 2018 |
| 28 | jhu.edu | 8.93/10 | 177,300 | 5,821 | Aug 2018 |
| 29 | wa.gov | 8.93/10 | 719,700 | 7,869 | Aug 2018 |
| 30 | shop-pro.jp | 8.91/10 | 17 | 9 | Aug 2018 |
| 31 | nyc.gov | 8.90/10 | 3,946,700 | 716,970 | Oct 2018 |
| 32 | azurewebsites.net | 8.87/10 | - | - | Aug 2021 |
| 33 | fandom.com | 8.87/10 | 96,300 | 43,935 | Apr 2019 |
| 34 | us.com | 8.86/10 | 32 | 8 | Jan 2019 |
| 35 | podbean.com | 8.85/10 | 33,700 | 26,056 | Jan 2019 |
| 36 | ucsd.edu | 8.84/10 | 48,100 | 2,261 | Aug 2018 |
| 37 | ubc.ca | 8.84/10 | 14,500 | 2,813 | Jan 2019 |
| 38 | illinois.edu | 8.83/10 | 47,000 | 3,612 | Aug 2018 |
| 39 | ucdavis.edu | 8.83/10 | 381,100 | 81,485 | Aug 2018 |
| 40 | maryland.gov | 8.82/10 | 173,200 | 7,155 | Aug 2018 |
| 41 | it.com | 8.81/10 | - | - | Jun 2025 |
| 42 | mpg.de | 8.81/10 | 59,700 | 20,903 | Aug 2018 |
| 43 | colorado.gov | 8.81/10 | 81,300 | 11,605 | Apr 2026 |
| 44 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Aug 2018 |
| 45 | fc2.com | 8.80/10 | 5,100 | 10 | Aug 2018 |
| 46 | sfu.ca | 8.80/10 | 210,600 | 61,463 | Nov 2020 |
| 47 | utah.gov | 8.80/10 | 129,700 | 22,115 | Aug 2018 |
| 48 | hp.com | 8.78/10 | 2,701,800 | 494,419 | Jul 2020 |
| 49 | gouv.qc.ca | 8.77/10 | - | - | Aug 2018 |
| 50 | mysql.com | 8.76/10 | 50,100 | 14,381 | Aug 2018 |
| 51 | bigcartel.com | 8.76/10 | 3,300 | 1,679 | Jan 2016 |
| 52 | web.app | 8.76/10 | - | - | Aug 2022 |
| 53 | ohio.gov | 8.76/10 | 366,800 | 33,026 | Aug 2018 |
| 54 | bookshop.org | 8.75/10 | 403,100 | 179,755 | Dec 2020 |
| 55 | herokuapp.com | 8.74/10 | - | - | Jan 2019 |
| 56 | ons.gov.uk | 8.74/10 | 106,200 | 68,872 | Dec 2024 |
| 57 | ucl.ac.uk | 8.74/10 | 154,800 | 93,062 | Aug 2018 |
| 58 | faa.gov | 8.73/10 | 2,209,300 | 278,808 | Sep 2024 |
| 59 | tn.gov | 8.72/10 | 1,732,300 | 630,039 | May 2022 |
| 60 | plesk.com | 8.71/10 | 5,700 | 4,971 | Aug 2022 |
| 61 | freshdesk.com | 8.71/10 | 3 | 2 | Aug 2018 |
| 62 | uwaterloo.ca | 8.71/10 | 224,700 | 71,840 | Sep 2021 |
| 63 | rochester.edu | 8.71/10 | 241,200 | 60,872 | Aug 2022 |
| 64 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Aug 2018 |
| 65 | hku.hk | 8.70/10 | 6,000 | 1,100 | Aug 2018 |
| 66 | interieur.gouv.fr | 8.70/10 | 1,500 | 1,189 | Aug 2020 |
| 67 | bild.de | 8.70/10 | 18,400 | 24,798 | Mar 2021 |
| 68 | mcgill.ca | 8.70/10 | 403,000 | 145,097 | Aug 2018 |
| 69 | gov.bc.ca | 8.69/10 | 2,200 | 880 | Aug 2018 |
| 70 | pitt.edu | 8.69/10 | 62,900 | 8,520 | Aug 2018 |
| 71 | unibo.it | 8.68/10 | 11,100 | 4,872 | Aug 2018 |
| 72 | steamcommunity.com | 8.67/10 | 7,716,900 | 2,383,760 | May 2017 |
| 73 | co.com | 8.67/10 | - | - | Dec 2022 |
| 74 | wildapricot.org | 8.67/10 | - | - | Mar 2024 |
| 75 | ed.ac.uk | 8.67/10 | 29,600 | 5,927 | Aug 2018 |
| 76 | lse.ac.uk | 8.67/10 | 60,400 | 38,566 | Aug 2018 |
| 77 | unl.edu | 8.67/10 | 64,000 | 6,422 | Aug 2018 |
| 78 | fifa.com | 8.66/10 | 2,036,600 | 108,082 | Jan 2023 |
| 79 | peatix.com | 8.66/10 | 55 | 208 | Dec 2020 |
| 80 | altervista.org | 8.66/10 | - | - | Jan 2016 |
| 81 | ru.com | 8.65/10 | - | - | Jan 2019 |
| 82 | caltech.edu | 8.65/10 | 148,200 | 20,173 | Aug 2018 |
| 83 | culture.gouv.fr | 8.65/10 | 1,800 | 2,659 | Mar 2021 |
| 84 | iowa.gov | 8.64/10 | 68,600 | 15,174 | Aug 2018 |
| 85 | gwu.edu | 8.64/10 | 257,300 | 13,278 | Aug 2018 |
| 86 | main.jp | 8.64/10 | - | - | Aug 2018 |
| 87 | autodesk.com | 8.63/10 | 742,400 | 114,708 | Jun 2022 |
| 88 | proquest.com | 8.63/10 | 20,400 | 9,141 | Aug 2018 |
| 89 | gencat.cat | 8.63/10 | 86 | 174 | Aug 2018 |
| 90 | sachsen.de | 8.62/10 | 45 | 135 | Apr 2019 |
| 91 | buffalo.edu | 8.62/10 | 706,900 | 85,125 | Aug 2018 |
| 92 | com.de | 8.62/10 | 5 | 14 | Jun 2018 |
| 93 | colostate.edu | 8.62/10 | 189,100 | 10,871 | Feb 2019 |
| 94 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Aug 2018 |
| 95 | sante.fr | 8.62/10 | 1,100 | 3,872 | Jan 2019 |
| 96 | uva.nl | 8.62/10 | 24,400 | 9,670 | Aug 2018 |
| 97 | home.pl | 8.61/10 | 210 | 80 | Feb 2019 |
| 98 | hrc.org | 8.61/10 | 260,500 | 49,890 | Mar 2022 |
| 99 | iu.edu | 8.61/10 | 79,300 | 4,571 | Aug 2022 |
| 100 | tum.de | 8.61/10 | 7,800 | 7,642 | Jul 2023 |
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).