Websites Powered by Prototype
167,831 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
May 2022
Jun 2024
Jun 2026
Domains observed using Prototype in each month's HTTP Archive crawl,
Apr 2018 to Jun 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 53,327 Prototype sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
15,730
Germany
14,163
United Kingdom
7,567
France
7,298
India
7,101
Japan
6,865
Netherlands
6,404
Canada
6,196
Sites using Prototype by audience country, Chrome UX Report.
Top sites by authority
9+
7% · 25 of 372 sites
8+
5% · 377 of 7,677 sites
7+
2% · 1,043 of 45,712 sites
6+
2% · 1,674 of 110,136 sites
5+
1% · 2,488 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 |
|---|---|---|---|---|---|
| 201 | cas.cz | 8.33/10 | - | - | Jan 2019 |
| 202 | uw.edu.pl | 8.33/10 | 240 | 261 | Aug 2018 |
| 203 | tampabay.com | 8.32/10 | 269,900 | 207,009 | Mar 2020 |
| 204 | sebrae.com.br | 8.32/10 | 1,800 | 3,151 | Jun 2025 |
| 205 | has-sante.fr | 8.32/10 | 4,500 | 6,529 | Apr 2018 |
| 206 | ina.fr | 8.32/10 | 1,400 | 5,358 | Feb 2019 |
| 207 | cafe24.com | 8.31/10 | 6 | 6 | Feb 2020 |
| 208 | cbr.ru | 8.31/10 | 45,500 | 11,972 | Apr 2026 |
| 209 | ul.com | 8.31/10 | 45,600 | 23,537 | Mar 2020 |
| 210 | asha.org | 8.31/10 | 252,400 | 50,669 | Jun 2026 |
| 211 | wm.edu | 8.31/10 | 210,900 | 51,291 | Aug 2018 |
| 212 | wvu.edu | 8.31/10 | 89,800 | 17,348 | Aug 2018 |
| 213 | uniroma1.it | 8.31/10 | 5,100 | 3,214 | Aug 2018 |
| 214 | udn.com | 8.30/10 | 1,600 | 1,080 | Aug 2018 |
| 215 | ti.com | 8.30/10 | 249,900 | 69,001 | May 2023 |
| 216 | 3m.com | 8.30/10 | 551,800 | 132,468 | Aug 2018 |
| 217 | brill.com | 8.30/10 | 75,200 | 68,231 | Apr 2018 |
| 218 | uni-trier.de | 8.30/10 | 750 | 748 | Aug 2018 |
| 219 | carleton.ca | 8.30/10 | 49,300 | 20,005 | Nov 2020 |
| 220 | dal.ca | 8.30/10 | 26,100 | 12,945 | Oct 2020 |
| 221 | service-now.com | 8.29/10 | - | - | Aug 2018 |
| 222 | cardiff.ac.uk | 8.29/10 | 22,900 | 8,882 | Sep 2021 |
| 223 | saarland.de | 8.29/10 | 230 | 275 | Nov 2021 |
| 224 | concordia.ca | 8.29/10 | 44,000 | 27,103 | Aug 2018 |
| 225 | rpi.edu | 8.29/10 | 48,000 | 6,018 | Aug 2018 |
| 226 | spektrum.de | 8.29/10 | 1,300 | 2,143 | Jan 2024 |
| 227 | baylor.edu | 8.29/10 | 93,700 | 12,866 | Oct 2022 |
| 228 | open.ac.uk | 8.28/10 | 15,700 | 12,237 | Aug 2018 |
| 229 | umanitoba.ca | 8.28/10 | 25,600 | 17,260 | Aug 2018 |
| 230 | kyushu-u.ac.jp | 8.28/10 | 680 | 731 | Aug 2018 |
| 231 | com.ru | 8.27/10 | - | - | Jan 2019 |
| 232 | ubs.com | 8.27/10 | 127,200 | 56,066 | Aug 2018 |
| 233 | unitn.it | 8.27/10 | 1,600 | 1,402 | Apr 2020 |
| 234 | jcu.edu.au | 8.27/10 | 14,300 | 10,995 | Aug 2018 |
| 235 | uni-due.de | 8.27/10 | 1,800 | 2,153 | Aug 2018 |
| 236 | upc.edu | 8.27/10 | 1,400 | 1,502 | Feb 2024 |
| 237 | ritsumei.ac.jp | 8.27/10 | 960 | 1,069 | Feb 2019 |
| 238 | slu.se | 8.27/10 | 2,400 | 1,343 | Aug 2018 |
| 239 | charite.de | 8.26/10 | 600 | 676 | Apr 2020 |
| 240 | uark.edu | 8.26/10 | 90,000 | 9,143 | May 2021 |
| 241 | camera.it | 8.26/10 | 180 | 596 | Jun 2018 |
| 242 | unistra.fr | 8.26/10 | 1,500 | 1,386 | Aug 2018 |
| 243 | art.pl | 8.26/10 | - | - | Jan 2019 |
| 244 | utep.edu | 8.25/10 | 188,700 | 63,230 | Aug 2022 |
| 245 | rhs.org.uk | 8.25/10 | 439,000 | 246,520 | Mar 2023 |
| 246 | unito.it | 8.25/10 | 630 | 627 | Aug 2018 |
| 247 | usask.ca | 8.25/10 | 13,500 | 3,000 | Aug 2018 |
| 248 | sciencespo.fr | 8.25/10 | 33,100 | 16,968 | Aug 2018 |
| 249 | booksamillion.com | 8.24/10 | 736,000 | 300,910 | Apr 2018 |
| 250 | domaincoasters.com | 8.24/10 | 69 | 56 | Jan 2023 |
| 251 | pbworks.com | 8.24/10 | 1,800 | 510 | Aug 2018 |
| 252 | bp.com | 8.24/10 | 1,607,700 | 39,699 | Aug 2022 |
| 253 | umaryland.edu | 8.24/10 | 115,200 | 30,285 | Aug 2018 |
| 254 | umbc.edu | 8.24/10 | 70,000 | 13,948 | Aug 2018 |
| 255 | polisen.se | 8.24/10 | 1,500 | 1,581 | Oct 2023 |
| 256 | hiroshima.lg.jp | 8.24/10 | - | - | Aug 2022 |
| 257 | sub.jp | 8.24/10 | - | - | Jan 2019 |
| 258 | lycos.com | 8.23/10 | 6,600 | 319 | Aug 2018 |
| 259 | basf.com | 8.23/10 | 24,000 | 17,424 | Aug 2018 |
| 260 | jcyl.es | 8.23/10 | 230 | 267 | Aug 2018 |
| 261 | smu.edu | 8.23/10 | 377,800 | 71,712 | Apr 2026 |
| 262 | lavoixdunord.fr | 8.23/10 | 3,500 | 10,452 | Aug 2018 |
| 263 | gcs-web.com | 8.22/10 | - | - | Nov 2022 |
| 264 | techinasia.com | 8.22/10 | 10,900 | 16,026 | Apr 2020 |
| 265 | soton.ac.uk | 8.22/10 | - | - | Aug 2018 |
| 266 | state.ny.us | 8.22/10 | - | - | Jun 2023 |
| 267 | uni-regensburg.de | 8.22/10 | 680 | 893 | Aug 2018 |
| 268 | alaska.edu | 8.22/10 | 50,600 | 9,009 | Aug 2018 |
| 269 | madrid.es | 8.22/10 | 5,200 | 11,494 | Jun 2023 |
| 270 | unisg.ch | 8.22/10 | 6,200 | 3,093 | Aug 2018 |
| 271 | usal.es | 8.22/10 | 3,200 | 1,130 | May 2019 |
| 272 | ufsc.br | 8.22/10 | 120 | 86 | Aug 2018 |
| 273 | aa.com | 8.21/10 | 13,035,500 | 799,338 | Mar 2026 |
| 274 | anticorruzione.it | 8.21/10 | 680 | 511 | Oct 2020 |
| 275 | polito.it | 8.21/10 | 13,800 | 2,655 | Aug 2018 |
| 276 | uba.ar | 8.21/10 | 670 | 586 | Oct 2021 |
| 277 | reading.ac.uk | 8.20/10 | 15,100 | 12,029 | Aug 2018 |
| 278 | lavozdegalicia.es | 8.20/10 | 5,100 | 22,738 | May 2020 |
| 279 | amtrak.com | 8.19/10 | 2,749,800 | 587,330 | Apr 2019 |
| 280 | strategies.fr | 8.18/10 | 290 | 617 | May 2022 |
| 281 | dimensions.ai | 8.18/10 | 8,600 | 2,156 | Jan 2023 |
| 282 | iledefrance.fr | 8.18/10 | 700 | 1,353 | Sep 2020 |
| 283 | ntt-east.co.jp | 8.18/10 | 290 | 105 | Jan 2023 |
| 284 | bitwarden.com | 8.17/10 | 251,800 | 45,440 | Mar 2023 |
| 285 | medtronic.com | 8.17/10 | 198,600 | 64,576 | Aug 2022 |
| 286 | comunidad.madrid | 8.17/10 | 14,800 | 41,226 | Sep 2020 |
| 287 | lublin.pl | 8.17/10 | 4 | 3 | Apr 2018 |
| 288 | replit.app | 8.16/10 | - | - | Jun 2026 |
| 289 | blizzard.com | 8.16/10 | 59,200 | 7,073 | Aug 2018 |
| 290 | wfu.edu | 8.16/10 | 12,200 | 7,427 | Feb 2020 |
| 291 | univ-lorraine.fr | 8.16/10 | 510 | 500 | Jan 2019 |
| 292 | eaton.com | 8.15/10 | 433,500 | 130,964 | Aug 2018 |
| 293 | government.bg | 8.15/10 | - | 3 | Dec 2020 |
| 294 | sltrib.com | 8.15/10 | 205,000 | 130,539 | Mar 2022 |
| 295 | kicker.de | 8.14/10 | 17,000 | 17,832 | Aug 2018 |
| 296 | unifi.it | 8.14/10 | 1,000 | 586 | May 2024 |
| 297 | wttw.com | 8.13/10 | 114,600 | 49,685 | Aug 2018 |
| 298 | jku.at | 8.13/10 | 1,500 | 1,119 | Jan 2019 |
| 299 | uoa.gr | 8.13/10 | 29 | 56 | Aug 2018 |
| 300 | jpn.org | 8.13/10 | - | - | 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) →