Websites Powered by Prototype
168,470 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
Jun 2020
Jul 2022
Sep 2024
Oct 2026
Domains observed using Prototype in each month's HTTP Archive crawl,
Apr 2018 to Oct 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 | 0.40% | 251 |
| Government | 0.31% | 29 |
| Industrial and manufacturing | 0.29% | 15 |
| Arts and entertainment | 0.17% | 86 |
| Retail | 0.15% | 542 |
| Non-profit and religious | 0.14% | 14 |
| Pets and animals | 0.13% | 4 |
| Finance and insurance | 0.10% | 21 |
| Travel and hospitality | 0.06% | 53 |
| Automotive | 0.06% | 50 |
| News and media | 0.06% | 29 |
| Sports and fitness | 0.06% | 12 |
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+
5% · 20 of 372 sites
8+
4% · 345 of 7,677 sites
7+
2% · 970 of 45,712 sites
6+
1% · 1,563 of 110,136 sites
5+
<1% · 2,327 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 |
|---|---|---|---|---|---|
| 301 | agu.org | 8.06/10 | 26,700 | 13,251 | Aug 2022 |
| 302 | aragon.es | 8.06/10 | 990 | 3,103 | Aug 2018 |
| 303 | uni-giessen.de | 8.06/10 | 1,600 | 1,978 | Sep 2020 |
| 304 | powerschool.com | 8.05/10 | 318,100 | 29,147 | Aug 2018 |
| 305 | sjtu.edu.cn | 8.05/10 | 22 | 9 | Aug 2018 |
| 306 | bris.ac.uk | 8.05/10 | 160 | 40 | Aug 2018 |
| 307 | westernsydney.edu.au | 8.05/10 | 21,600 | 20,869 | Aug 2018 |
| 308 | siteimprove.com | 8.04/10 | 13,600 | 3,469 | Oct 2021 |
| 309 | curseforge.com | 8.04/10 | 1,614,200 | 365,114 | Jul 2021 |
| 310 | komi.io | 8.04/10 | 270 | 289 | Jun 2024 |
| 311 | poste.it | 8.04/10 | 5,700 | 3,508 | Aug 2018 |
| 312 | strath.ac.uk | 8.04/10 | 16,900 | 8,662 | Aug 2018 |
| 313 | bostonherald.com | 8.04/10 | 112,600 | 126,504 | May 2022 |
| 314 | ui.ac.id | 8.04/10 | 190 | 21 | Aug 2018 |
| 315 | adn.com | 8.03/10 | 118,600 | 66,861 | May 2019 |
| 316 | acas.org.uk | 8.03/10 | 29,700 | 27,720 | Mar 2026 |
| 317 | uni-bayreuth.de | 8.03/10 | 720 | 442 | Aug 2018 |
| 318 | olemiss.edu | 8.03/10 | 325,700 | 29,412 | Aug 2018 |
| 319 | microchip.com | 8.02/10 | 41,300 | 18,941 | Mar 2024 |
| 320 | vero.fi | 8.02/10 | 2,100 | 2,075 | Oct 2026 |
| 321 | siam.org | 8.02/10 | 21,000 | 3,336 | Aug 2022 |
| 322 | bham.ac.uk | 8.02/10 | - | - | Aug 2018 |
| 323 | masslive.com | 8.02/10 | 676,900 | 350,128 | Jul 2025 |
| 324 | mass.edu | 8.02/10 | 14,900 | 7,565 | Aug 2018 |
| 325 | ehu.eus | 8.02/10 | 5,900 | 4,043 | Dec 2020 |
| 326 | uea.ac.uk | 8.02/10 | 11,700 | 4,276 | Aug 2018 |
| 327 | bg.ac.rs | 8.02/10 | 68 | 28 | Dec 2021 |
| 328 | mun.ca | 8.02/10 | 28,700 | 14,305 | Jan 2019 |
| 329 | usherbrooke.ca | 8.02/10 | 1,900 | 1,682 | Jan 2022 |
| 330 | livsmedelsverket.se | 8.02/10 | 970 | 1,096 | Oct 2026 |
| 331 | rajasthan.gov.in | 8.01/10 | 3,100 | 236 | Aug 2018 |
| 332 | essex.ac.uk | 8.01/10 | 19,600 | 6,839 | Aug 2018 |
| 333 | liverpool.ac.uk | 8.01/10 | 20,200 | 13,785 | Aug 2018 |
| 334 | msa.fr | 8.01/10 | 780 | 607 | Nov 2021 |
| 335 | uliege.be | 8.01/10 | 320 | 106 | Oct 2017 |
| 336 | uminho.pt | 8.01/10 | 300 | 85 | Aug 2018 |
| 337 | uva.es | 8.01/10 | 240 | 324 | Apr 2025 |
| 338 | unstoppabledomains.com | 8.00/10 | 10,100 | 1,639 | Jan 2023 |
| 339 | learnworlds.com | 8.00/10 | 6,900 | 5,212 | Feb 2020 |
| 340 | ala.org.au | 8.00/10 | 1,100 | 1,289 | Feb 2023 |
| 341 | shef.ac.uk | 8.00/10 | - | - | Jul 2023 |
| 342 | city.ac.uk | 8.00/10 | - | 4 | Aug 2018 |
| 343 | uniroma2.it | 8.00/10 | 3 | 23 | Feb 2019 |
| 344 | upol.cz | 8.00/10 | 340 | 91 | Apr 2019 |
| 345 | mcu.es | 8.00/10 | 1 | 28 | Aug 2018 |
| 346 | alfahosting.de | 7.99/10 | 21 | 27 | May 2017 |
| 347 | hec.ca | 7.99/10 | 4,600 | 2,911 | Nov 2020 |
| 348 | aircanada.com | 7.99/10 | 598,900 | 216,548 | Apr 2022 |
| 349 | wlu.ca | 7.99/10 | 7,400 | 4,251 | Jan 2021 |
| 350 | syracuse.edu | 7.99/10 | 212,900 | 24,678 | Aug 2018 |
| 351 | jhuapl.edu | 7.99/10 | 72,000 | 10,723 | Oct 2026 |
| 352 | unlp.edu.ar | 7.99/10 | 960 | 1,360 | Jan 2016 |
| 353 | ugm.ac.id | 7.99/10 | 2,400 | 2,813 | Aug 2018 |
| 354 | ddns.net | 7.98/10 | - | - | Aug 2022 |
| 355 | cvshealth.com | 7.98/10 | 2,269,900 | 22,402 | Sep 2024 |
| 356 | insighttimer.com | 7.98/10 | 74,400 | 36,059 | Jan 2023 |
| 357 | sinica.edu.tw | 7.98/10 | 980 | 202 | Aug 2018 |
| 358 | duesseldorf.de | 7.98/10 | 5,500 | 971 | Dec 2020 |
| 359 | und.edu | 7.98/10 | 198,100 | 39,640 | Feb 2020 |
| 360 | philpapers.org | 7.98/10 | 53,900 | 53,222 | May 2017 |
| 361 | iqvia.com | 7.97/10 | 43,700 | 14,446 | Dec 2025 |
| 362 | pennlive.com | 7.97/10 | 571,000 | 344,384 | May 2023 |
| 363 | bethesda.net | 7.96/10 | 212,600 | 16,082 | Jan 2024 |
| 364 | gia.edu | 7.96/10 | 709,100 | 44,336 | Aug 2022 |
| 365 | dresden.de | 7.96/10 | 2,900 | 1,092 | Jan 2019 |
| 366 | cirad.fr | 7.96/10 | 7,400 | 1,387 | Aug 2018 |
| 367 | fukushima.lg.jp | 7.96/10 | - | - | Jun 2024 |
| 368 | bmc.com | 7.95/10 | 49,700 | 13,129 | Mar 2025 |
| 369 | regione.veneto.it | 7.95/10 | 110 | 339 | Jul 2021 |
| 370 | defensa.gob.es | 7.95/10 | 1,400 | 2,604 | Aug 2018 |
| 371 | maregionsud.fr | 7.95/10 | 120 | 216 | May 2023 |
| 372 | moo.jp | 7.95/10 | - | - | Aug 2018 |
| 373 | cnfpt.fr | 7.94/10 | 130 | 354 | Aug 2018 |
| 374 | pchome.com.tw | 7.94/10 | 500 | 31 | Aug 2018 |
| 375 | arts.ac.uk | 7.94/10 | 23,100 | 9,526 | Aug 2018 |
| 376 | kerala.gov.in | 7.94/10 | 540 | 50 | Apr 2019 |
| 377 | czso.cz | 7.94/10 | - | - | Aug 2022 |
| 378 | feedblitz.com | 7.93/10 | 46 | 87 | Jan 2023 |
| 379 | torontomu.ca | 7.93/10 | 22,900 | 18,097 | Mar 2023 |
| 380 | london.edu | 7.92/10 | 11,800 | 8,303 | Jul 2022 |
| 381 | lshtm.ac.uk | 7.92/10 | 17,000 | 8,513 | Aug 2018 |
| 382 | unizg.hr | 7.92/10 | 950 | 148 | Aug 2018 |
| 383 | sandiegocounty.gov | 7.92/10 | 320,400 | 107,941 | Nov 2024 |
| 384 | castillalamancha.es | 7.92/10 | 1,600 | 3,617 | Aug 2018 |
| 385 | agh.edu.pl | 7.92/10 | 170 | 121 | Aug 2018 |
| 386 | ocnk.net | 7.91/10 | - | - | Aug 2018 |
| 387 | rightmove.co.uk | 7.91/10 | 183,800 | 172,963 | Feb 2020 |
| 388 | nycgovparks.org | 7.91/10 | 2,135,300 | 91,587 | Jul 2023 |
| 389 | jpcert.or.jp | 7.91/10 | 50 | 308 | Jan 2016 |
| 390 | utoledo.edu | 7.91/10 | 158,600 | 44,262 | Aug 2018 |
| 391 | scot.nhs.uk | 7.90/10 | 460 | 251 | Aug 2018 |
| 392 | eprints.org | 7.90/10 | 110 | 22 | Jan 2019 |
| 393 | ucr.ac.cr | 7.90/10 | 3,300 | 1,872 | Aug 2018 |
| 394 | oanda.com | 7.89/10 | 2,105,400 | 51,986 | Jul 2023 |
| 395 | lancs.ac.uk | 7.89/10 | 1 | 21 | May 2017 |
| 396 | wfanet.org | 7.88/10 | 1,500 | 449 | Dec 2019 |
| 397 | yodobashi.com | 7.88/10 | 4,100 | 6,150 | Jan 2016 |
| 398 | leipzig.de | 7.88/10 | 480 | 1,045 | Mar 2024 |
| 399 | strasbourg.eu | 7.88/10 | 580 | 689 | Aug 2018 |
| 400 | umontpellier.fr | 7.88/10 | 1,600 | 1,287 | May 2019 |
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).