Websites Powered by Spectra
102,349 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
Nov 2024
Sep 2025
Jun 2026
Domains observed using Spectra in each month's HTTP Archive crawl,
Apr 2023 to Jun 2026 · peak 37,939 in Mar 2026. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.2 s
INP 75 ms
CLS 0
TTFB 1200 ms
Median site among 35,019 Spectra sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
7,537
India
4,102
France
3,960
Spain
3,431
Germany
3,198
United Kingdom
2,579
Poland
2,153
Mexico
2,107
Sites using Spectra by audience country, Chrome UX Report.
Top sites by authority
9+
1% · 4 of 372 sites
8+
2% · 120 of 7,677 sites
7+
<1% · 299 of 45,712 sites
6+
<1% · 488 of 110,136 sites
5+
<1% · 758 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 | 383,900 | 97,788 | Apr 2024 |
| 2 | harvard.edu | 9.24/10 | 472,900 | 13,570 | Apr 2023 |
| 3 | umich.edu | 9.01/10 | 36,500 | 1,974 | May 2024 |
| 4 | uk.com | 9.00/10 | 2 | 12 | Apr 2023 |
| 5 | texas.gov | 8.98/10 | 856,400 | 43,777 | Jun 2023 |
| 6 | sakura.ne.jp | 8.95/10 | - | - | Sep 2023 |
| 7 | ucla.edu | 8.93/10 | 412,200 | 14,756 | May 2023 |
| 8 | jhu.edu | 8.93/10 | 177,400 | 6,915 | Dec 2023 |
| 9 | bayern.de | 8.92/10 | 12,500 | 512 | Jun 2025 |
| 10 | utexas.edu | 8.92/10 | 503,000 | 11,984 | Jun 2023 |
| 11 | usc.edu | 8.89/10 | 361,000 | 14,987 | Nov 2023 |
| 12 | us.com | 8.86/10 | 32 | 9 | Aug 2025 |
| 13 | nami.org | 8.86/10 | 626,800 | 117,511 | Oct 2024 |
| 14 | purdue.edu | 8.86/10 | 744,800 | 169,159 | Sep 2025 |
| 15 | northwestern.edu | 8.86/10 | 193,400 | 45,922 | Apr 2023 |
| 16 | ufl.edu | 8.84/10 | 241,600 | 3,624 | Jun 2023 |
| 17 | tokyo.lg.jp | 8.83/10 | - | - | Nov 2025 |
| 18 | cnrs.fr | 8.82/10 | 4,300 | 2,992 | Feb 2024 |
| 19 | it.com | 8.81/10 | - | - | Sep 2024 |
| 20 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Feb 2024 |
| 21 | in.gov | 8.80/10 | 3,076,000 | 1,001,546 | Feb 2024 |
| 22 | eu.com | 8.77/10 | - | - | Dec 2024 |
| 23 | tamu.edu | 8.76/10 | 352,900 | 11,636 | Apr 2023 |
| 24 | cern.ch | 8.76/10 | 950 | 261 | Sep 2023 |
| 25 | army.mil | 8.75/10 | 1,049,000 | 286,727 | Apr 2023 |
| 26 | rutgers.edu | 8.75/10 | 147,400 | 31,478 | Oct 2023 |
| 27 | wpastra.com | 8.71/10 | 14,800 | 14,659 | Jan 2024 |
| 28 | ucsb.edu | 8.71/10 | 73,800 | 11,445 | Feb 2026 |
| 29 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Jun 2025 |
| 30 | hku.hk | 8.70/10 | 6,000 | 1,100 | Aug 2024 |
| 31 | ucsf.edu | 8.70/10 | 162,500 | 56,785 | Feb 2024 |
| 32 | in.net | 8.69/10 | - | - | Oct 2024 |
| 33 | ky.gov | 8.68/10 | - | 1 | May 2024 |
| 34 | pantheonsite.io | 8.67/10 | 7 | 5 | Aug 2023 |
| 35 | esa.int | 8.67/10 | 412,100 | 94,679 | Apr 2023 |
| 36 | altervista.org | 8.66/10 | - | - | Apr 2023 |
| 37 | uga.edu | 8.65/10 | 234,400 | 2,908 | Nov 2023 |
| 38 | usp.br | 8.65/10 | 1 | 19 | Apr 2023 |
| 39 | education.gouv.fr | 8.64/10 | 7,000 | 6,860 | Mar 2026 |
| 40 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Jan 2024 |
| 41 | spreaker.com | 8.60/10 | 76,100 | 71,786 | Jun 2023 |
| 42 | letemps.ch | 8.60/10 | 2,900 | 5,495 | Feb 2024 |
| 43 | cn.com | 8.59/10 | 17 | 8 | Feb 2024 |
| 44 | nd.edu | 8.59/10 | 56,800 | 8,385 | Feb 2024 |
| 45 | krakow.pl | 8.59/10 | 690 | 649 | Apr 2023 |
| 46 | unam.mx | 8.58/10 | 1,900 | 1,196 | May 2023 |
| 47 | cnr.it | 8.57/10 | 810 | 1,174 | Apr 2023 |
| 48 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Apr 2023 |
| 49 | utwente.nl | 8.56/10 | 11,800 | 6,416 | Mar 2024 |
| 50 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Feb 2024 |
| 51 | nato.int | 8.55/10 | 340,700 | 121,553 | Sep 2025 |
| 52 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Jul 2025 |
| 53 | spb.ru | 8.53/10 | - | - | Apr 2023 |
| 54 | ucr.edu | 8.53/10 | 112,800 | 12,297 | Oct 2024 |
| 55 | jp.net | 8.52/10 | 66 | 7 | Jun 2026 |
| 56 | manchester.ac.uk | 8.52/10 | 64,000 | 18,257 | Jul 2023 |
| 57 | upm.es | 8.52/10 | 2,100 | 1,692 | Jul 2023 |
| 58 | unizar.es | 8.51/10 | 280 | 138 | Mar 2026 |
| 59 | bc.edu | 8.50/10 | 205,200 | 43,802 | Apr 2023 |
| 60 | umontreal.ca | 8.50/10 | 3,700 | 761 | Jun 2026 |
| 61 | hostingersite.com | 8.49/10 | - | - | Jun 2024 |
| 62 | poznan.pl | 8.47/10 | 320 | 564 | Apr 2023 |
| 63 | de.com | 8.46/10 | - | 2 | Oct 2025 |
| 64 | queensu.ca | 8.46/10 | 44,000 | 26,583 | Jun 2025 |
| 65 | aspeninstitute.org | 8.44/10 | 48,300 | 16,988 | Oct 2023 |
| 66 | uk.net | 8.41/10 | - | - | Feb 2024 |
| 67 | unipd.it | 8.41/10 | 3,000 | 3,552 | May 2026 |
| 68 | demandsage.com | 8.40/10 | 90,300 | 19,961 | Nov 2023 |
| 69 | us.org | 8.39/10 | - | 2 | Feb 2024 |
| 70 | polimi.it | 8.38/10 | 5,800 | 4,283 | Feb 2024 |
| 71 | pp.ua | 8.37/10 | 22 | 5 | May 2024 |
| 72 | jrc.or.jp | 8.37/10 | 420 | 340 | Apr 2026 |
| 73 | jpn.com | 8.36/10 | - | - | Mar 2025 |
| 74 | st-andrews.ac.uk | 8.36/10 | 48,900 | 16,687 | Feb 2024 |
| 75 | ua.edu | 8.36/10 | 76,300 | 9,473 | Apr 2023 |
| 76 | ne.gov | 8.36/10 | 71 | 79 | Aug 2025 |
| 77 | wroc.pl | 8.36/10 | - | - | Feb 2024 |
| 78 | ufmg.br | 8.36/10 | 3,300 | 1,765 | May 2024 |
| 79 | org.ru | 8.35/10 | - | - | Oct 2024 |
| 80 | br.com | 8.34/10 | - | - | Aug 2023 |
| 81 | tcd.ie | 8.34/10 | 25,400 | 17,278 | Jun 2026 |
| 82 | cvut.cz | 8.34/10 | 1,200 | 214 | Jan 2024 |
| 83 | unicamp.br | 8.34/10 | 860 | 1,061 | Jul 2023 |
| 84 | unipi.it | 8.32/10 | 1,500 | 1,950 | Oct 2023 |
| 85 | up.pt | 8.30/10 | 2,100 | 1,076 | May 2024 |
| 86 | unu.edu | 8.28/10 | 16,800 | 5,872 | Dec 2024 |
| 87 | iit.edu | 8.27/10 | 80,800 | 30,957 | Feb 2024 |
| 88 | upc.edu | 8.27/10 | 1,400 | 1,502 | Dec 2024 |
| 89 | gb.net | 8.26/10 | - | 1 | Jun 2026 |
| 90 | websitedemos.net | 8.25/10 | 23 | 155 | Aug 2025 |
| 91 | uni-kiel.de | 8.25/10 | 1,300 | 766 | Dec 2023 |
| 92 | unito.it | 8.25/10 | 630 | 627 | Apr 2025 |
| 93 | boston.gov | 8.25/10 | 645,100 | 155,908 | Aug 2023 |
| 94 | ufrj.br | 8.25/10 | 320 | 114 | Apr 2023 |
| 95 | collinsdictionary.com | 8.24/10 | 27,981,900 | 2,946,468 | Jun 2023 |
| 96 | ntu.edu.tw | 8.24/10 | 1,500 | 817 | Apr 2024 |
| 97 | uj.edu.pl | 8.24/10 | 360 | 132 | Oct 2025 |
| 98 | gov.hr | 8.22/10 | 1,600 | 883 | Jan 2024 |
| 99 | soton.ac.uk | 8.22/10 | - | - | Nov 2025 |
| 100 | nhsinform.scot | 8.22/10 | 1,619,500 | 429,341 | Jul 2024 |
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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