Websites Powered by Spectra
107,678 websites tracked using Spectra (WordPress plugins) · wpspectra.com
Spectra is a WordPress plugin that adds functionality to a WordPress site. Its official site is wpspectra.com. PoweredBy tracks the websites that use Spectra across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the wordpress plugins ecosystem.
Usage trend
10K
20K
30K
40K
Apr 2023
Feb 2024
Jan 2025
Nov 2025
Sep 2026
Domains observed using Spectra in each month's HTTP Archive crawl,
Apr 2023 to Sep 2026 · peak 37,939 in Mar 2026. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.1 s
INP 75 ms
CLS 0
TTFB 1200 ms
Median site among 34,888 Spectra sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
6,602
India
3,531
France
3,304
Spain
3,161
Germany
2,821
United Kingdom
2,299
Poland
1,984
Italy
1,917
Sites using Spectra by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Legal | 0.97% | 228 |
| Arts and entertainment | 0.85% | 351 |
| Blogs and publishing | 0.70% | 172 |
| Education | 0.62% | 310 |
| Non-profit and religious | 0.61% | 48 |
| Pets and animals | 0.58% | 16 |
| Healthcare | 0.51% | 547 |
| Beauty and wellness | 0.50% | 129 |
| Home and construction | 0.48% | 228 |
| Professional services | 0.47% | 195 |
| Sports and fitness | 0.46% | 76 |
| News and media | 0.40% | 169 |
Share of each industry's websites with a detected stack that use Spectra; industries come from what sites declare in their own structured data.
Top sites by authority
9+
1% · 5 of 372 sites
8+
2% · 118 of 7,677 sites
7+
<1% · 289 of 45,712 sites
6+
<1% · 472 of 110,136 sites
5+
<1% · 718 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Spectra in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Spectra
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | w3.org | 9.32/10 | 381,600 | 83,851 | Apr 2024 |
| 2 | harvard.edu | 9.24/10 | 472,700 | 11,444 | Apr 2023 |
| 3 | berkeley.edu | 9.10/10 | 166,700 | 4,721 | Sep 2023 |
| 4 | umich.edu | 9.01/10 | 36,500 | 1,974 | May 2024 |
| 5 | uk.com | 9.00/10 | 2 | 12 | Apr 2023 |
| 6 | texas.gov | 8.98/10 | 917,200 | 38,560 | Jun 2023 |
| 7 | sakura.ne.jp | 8.95/10 | - | - | Sep 2023 |
| 8 | ucla.edu | 8.93/10 | 410,700 | 13,782 | May 2023 |
| 9 | jhu.edu | 8.93/10 | 177,300 | 5,821 | Dec 2023 |
| 10 | bayern.de | 8.92/10 | 12,500 | 512 | Jun 2025 |
| 11 | usc.edu | 8.89/10 | 362,800 | 14,354 | Nov 2023 |
| 12 | azurewebsites.net | 8.87/10 | - | - | Apr 2024 |
| 13 | us.com | 8.86/10 | 32 | 8 | Aug 2025 |
| 14 | nami.org | 8.86/10 | 621,700 | 102,202 | Oct 2024 |
| 15 | purdue.edu | 8.86/10 | 746,900 | 132,133 | Sep 2025 |
| 16 | northwestern.edu | 8.86/10 | 193,400 | 45,922 | Apr 2023 |
| 17 | ufl.edu | 8.84/10 | 241,500 | 3,277 | Jun 2023 |
| 18 | tokyo.lg.jp | 8.83/10 | - | - | Nov 2025 |
| 19 | cnrs.fr | 8.82/10 | 4,300 | 2,992 | Feb 2024 |
| 20 | in.gov | 8.80/10 | 3,047,100 | 832,670 | Feb 2024 |
| 21 | eu.com | 8.77/10 | - | - | Dec 2024 |
| 22 | tamu.edu | 8.76/10 | 349,600 | 9,431 | Apr 2023 |
| 23 | cern.ch | 8.76/10 | 950 | 261 | Sep 2023 |
| 24 | army.mil | 8.75/10 | 1,036,400 | 233,760 | Apr 2023 |
| 25 | rutgers.edu | 8.75/10 | 146,600 | 28,567 | Oct 2023 |
| 26 | wpastra.com | 8.71/10 | 14,800 | 14,659 | Jan 2024 |
| 27 | ucsb.edu | 8.71/10 | 73,800 | 11,445 | Feb 2026 |
| 28 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Jun 2025 |
| 29 | hku.hk | 8.70/10 | 6,000 | 1,100 | Aug 2024 |
| 30 | in.net | 8.69/10 | - | - | Oct 2024 |
| 31 | ky.gov | 8.68/10 | - | 1 | May 2024 |
| 32 | xsrv.jp | 8.68/10 | - | - | Feb 2024 |
| 33 | pantheonsite.io | 8.67/10 | 7 | 5 | Aug 2023 |
| 34 | esa.int | 8.67/10 | 412,100 | 94,679 | Apr 2023 |
| 35 | hawaii.gov | 8.67/10 | 34 | 238 | Oct 2024 |
| 36 | altervista.org | 8.66/10 | - | - | Apr 2023 |
| 37 | idaho.gov | 8.65/10 | 95,300 | 6,755 | Feb 2024 |
| 38 | uga.edu | 8.65/10 | 234,500 | 2,950 | Nov 2023 |
| 39 | usp.br | 8.65/10 | 1 | 19 | Apr 2023 |
| 40 | education.gouv.fr | 8.64/10 | 7,000 | 6,860 | Mar 2026 |
| 41 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Jan 2024 |
| 42 | spreaker.com | 8.60/10 | 75,100 | 65,010 | Jun 2023 |
| 43 | cn.com | 8.59/10 | 17 | 8 | Feb 2024 |
| 44 | krakow.pl | 8.59/10 | 690 | 649 | Apr 2023 |
| 45 | unam.mx | 8.58/10 | 1,900 | 1,196 | May 2023 |
| 46 | cnr.it | 8.57/10 | 810 | 1,174 | Apr 2023 |
| 47 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Apr 2023 |
| 48 | utwente.nl | 8.56/10 | 11,800 | 6,416 | Mar 2024 |
| 49 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Feb 2024 |
| 50 | nato.int | 8.55/10 | 340,700 | 121,553 | Sep 2025 |
| 51 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Jul 2025 |
| 52 | spb.ru | 8.53/10 | - | - | Apr 2023 |
| 53 | ucr.edu | 8.53/10 | 112,800 | 11,969 | Oct 2024 |
| 54 | jp.net | 8.52/10 | 66 | 7 | Jun 2026 |
| 55 | upm.es | 8.52/10 | 2,100 | 1,692 | Jul 2023 |
| 56 | gov.ro | 8.51/10 | 640 | 166 | Sep 2026 |
| 57 | bc.edu | 8.50/10 | 203,700 | 39,165 | Apr 2023 |
| 58 | umontreal.ca | 8.50/10 | 3,700 | 761 | Jun 2026 |
| 59 | hostingersite.com | 8.49/10 | - | - | Jun 2024 |
| 60 | poznan.pl | 8.47/10 | 320 | 564 | Apr 2023 |
| 61 | de.com | 8.46/10 | - | 2 | Oct 2025 |
| 62 | queensu.ca | 8.46/10 | 44,000 | 26,583 | Jun 2025 |
| 63 | aspeninstitute.org | 8.44/10 | 47,900 | 14,922 | Oct 2023 |
| 64 | demandsage.com | 8.40/10 | 89,600 | 18,784 | Nov 2023 |
| 65 | polimi.it | 8.38/10 | 5,800 | 4,283 | Feb 2024 |
| 66 | pp.ua | 8.37/10 | 22 | 5 | May 2024 |
| 67 | jrc.or.jp | 8.37/10 | 420 | 340 | Apr 2026 |
| 68 | jpn.com | 8.36/10 | - | - | Mar 2025 |
| 69 | st-andrews.ac.uk | 8.36/10 | 48,900 | 16,687 | Feb 2024 |
| 70 | ua.edu | 8.36/10 | 76,000 | 8,713 | Apr 2023 |
| 71 | ne.gov | 8.36/10 | 130 | 196 | Aug 2025 |
| 72 | wroc.pl | 8.36/10 | - | - | Feb 2024 |
| 73 | ufmg.br | 8.36/10 | 3,300 | 1,765 | May 2024 |
| 74 | org.ru | 8.35/10 | - | - | Oct 2024 |
| 75 | harpercollins.com | 8.35/10 | 321,400 | 69,587 | Aug 2025 |
| 76 | br.com | 8.34/10 | - | - | Aug 2023 |
| 77 | tcd.ie | 8.34/10 | 25,400 | 17,278 | Jun 2026 |
| 78 | cvut.cz | 8.34/10 | 1,200 | 214 | Jan 2024 |
| 79 | unicamp.br | 8.34/10 | 860 | 1,061 | Jul 2023 |
| 80 | unipi.it | 8.32/10 | 1,500 | 1,950 | Oct 2023 |
| 81 | up.pt | 8.30/10 | 2,100 | 1,076 | May 2024 |
| 82 | unu.edu | 8.28/10 | 16,800 | 5,872 | Dec 2024 |
| 83 | com.ru | 8.27/10 | - | - | Apr 2023 |
| 84 | gale.com | 8.27/10 | 22,600 | 6,323 | Jul 2026 |
| 85 | iit.edu | 8.27/10 | 80,200 | 26,444 | Feb 2024 |
| 86 | upc.edu | 8.27/10 | 1,400 | 1,502 | Dec 2024 |
| 87 | websitedemos.net | 8.25/10 | 23 | 155 | Aug 2025 |
| 88 | uni-kiel.de | 8.25/10 | 1,300 | 766 | Dec 2023 |
| 89 | unito.it | 8.25/10 | 630 | 627 | Apr 2025 |
| 90 | boston.gov | 8.25/10 | 642,700 | 134,707 | Aug 2023 |
| 91 | ufrj.br | 8.25/10 | 320 | 114 | Apr 2023 |
| 92 | collinsdictionary.com | 8.24/10 | 27,981,900 | 2,946,468 | Jun 2023 |
| 93 | ntu.edu.tw | 8.24/10 | 1,500 | 817 | Apr 2024 |
| 94 | gda.pl | 8.24/10 | - | - | Mar 2024 |
| 95 | uj.edu.pl | 8.24/10 | 360 | 132 | Oct 2025 |
| 96 | gov.hr | 8.22/10 | 1,600 | 883 | Jan 2024 |
| 97 | soton.ac.uk | 8.22/10 | - | - | Nov 2025 |
| 98 | nhsinform.scot | 8.22/10 | 1,619,500 | 429,341 | Jul 2024 |
| 99 | alaska.edu | 8.22/10 | 50,600 | 7,766 | Oct 2024 |
| 100 | polito.it | 8.21/10 | 13,800 | 2,655 | Apr 2026 |
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).
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