Websites Powered by Complianz
554,522 websites tracked using Complianz (A/B Testing) · complianz.io
Complianz is a tool for running A/B and multivariate experiments to compare page variants. Its official site is complianz.io. PoweredBy tracks the websites that use Complianz across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the a/b testing ecosystem.
Usage trend
100K
200K
300K
Oct 2021
Dec 2022
Feb 2024
Apr 2025
Jun 2026
Domains observed using Complianz in each month's HTTP Archive crawl,
Oct 2021 to Jun 2026 · peak 268,789 in Jun 2026. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.3 s
INP 75 ms
CLS 0
TTFB 1300 ms
Median site among 254,530 Complianz sites with Chrome UX data, p75 values, Jun 2026.
Top countries
Spain
46,026
France
41,901
Germany
41,520
Italy
33,445
United States
21,357
United Kingdom
19,610
Netherlands
17,013
Czechia
11,831
Sites using Complianz by audience country, Chrome UX Report.
Top sites by authority
9+
3% · 13 of 372 sites
8+
3% · 231 of 7,677 sites
7+
2% · 844 of 45,712 sites
6+
2% · 1,719 of 110,136 sites
5+
1% · 3,575 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Complianz in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Complianz
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | Aug 2022 |
| 2 | forbes.com | 9.28/10 | 11,895,600 | 3,957,523 | Sep 2022 |
| 3 | who.int | 9.26/10 | 3,114,700 | 778,407 | Mar 2024 |
| 4 | weebly.com | 9.24/10 | 162,400 | 11,089 | Nov 2023 |
| 5 | ca.gov | 9.23/10 | 1,457,100 | 28,722 | Apr 2024 |
| 6 | berkeley.edu | 9.10/10 | 166,900 | 5,412 | Mar 2026 |
| 7 | state.gov | 9.07/10 | 3,314,200 | 200,218 | Apr 2025 |
| 8 | unesco.org | 9.06/10 | 294,400 | 71,304 | Mar 2026 |
| 9 | nginx.org | 9.05/10 | 17,500 | 22,208 | Jan 2025 |
| 10 | acm.org | 9.05/10 | 24,100 | 17,765 | Nov 2025 |
| 11 | wpengine.com | 9.04/10 | 66,500 | 17,967 | Nov 2021 |
| 12 | uk.com | 9.00/10 | 2 | 12 | Nov 2021 |
| 13 | upenn.edu | 9.00/10 | 179,200 | 5,457 | Apr 2026 |
| 14 | complianz.io | 8.98/10 | 510 | 864 | Nov 2021 |
| 15 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Sep 2023 |
| 16 | bayern.de | 8.92/10 | 12,500 | 512 | Nov 2021 |
| 17 | opensource.org | 8.89/10 | 22,200 | 6,030 | Nov 2023 |
| 18 | azurewebsites.net | 8.87/10 | - | - | Dec 2022 |
| 19 | cam.ac.uk | 8.87/10 | 208,200 | 35,354 | Dec 2021 |
| 20 | us.com | 8.86/10 | 32 | 9 | Oct 2021 |
| 21 | ufl.edu | 8.84/10 | 241,600 | 3,624 | Aug 2025 |
| 22 | cnrs.fr | 8.82/10 | 4,300 | 2,992 | Nov 2021 |
| 23 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Mar 2026 |
| 24 | in.gov | 8.80/10 | 3,076,000 | 1,001,546 | Oct 2025 |
| 25 | ipsos.com | 8.79/10 | 23,800 | 18,825 | Feb 2025 |
| 26 | fraunhofer.de | 8.79/10 | 2,900 | 3,059 | Aug 2023 |
| 27 | msu.edu | 8.78/10 | 149,500 | 2,641 | May 2026 |
| 28 | wpenginepowered.com | 8.77/10 | - | - | Dec 2025 |
| 29 | eu.com | 8.77/10 | - | - | Nov 2021 |
| 30 | gouv.qc.ca | 8.77/10 | - | - | Nov 2022 |
| 31 | usembassy.gov | 8.77/10 | 109,000 | 24,898 | Mar 2025 |
| 32 | mo.gov | 8.75/10 | 136,100 | 9,975 | Nov 2022 |
| 33 | uwaterloo.ca | 8.71/10 | 224,700 | 71,840 | Feb 2025 |
| 34 | in.net | 8.69/10 | - | - | Jul 2025 |
| 35 | pitt.edu | 8.69/10 | 62,900 | 8,815 | Aug 2023 |
| 36 | childmind.org | 8.68/10 | 163,900 | 61,541 | Jan 2026 |
| 37 | icons8.com | 8.68/10 | 573,200 | 189,796 | Apr 2024 |
| 38 | tufts.edu | 8.68/10 | 98,500 | 9,726 | Aug 2025 |
| 39 | xsrv.jp | 8.68/10 | - | - | Nov 2023 |
| 40 | corriere.it | 8.68/10 | 15,900 | 18,697 | Nov 2023 |
| 41 | pantheonsite.io | 8.67/10 | 7 | 5 | Dec 2022 |
| 42 | ed.ac.uk | 8.67/10 | 29,600 | 5,927 | Jan 2024 |
| 43 | esa.int | 8.67/10 | 412,100 | 94,679 | Nov 2021 |
| 44 | hawaii.gov | 8.67/10 | 34 | 270 | Aug 2023 |
| 45 | nba.com | 8.66/10 | 23,476,900 | 1,089,703 | Nov 2024 |
| 46 | altervista.org | 8.66/10 | - | - | Nov 2021 |
| 47 | greenpeace.org | 8.66/10 | 69,500 | 29,682 | Apr 2023 |
| 48 | ru.com | 8.65/10 | - | - | Mar 2026 |
| 49 | uga.edu | 8.65/10 | 234,400 | 2,908 | May 2024 |
| 50 | insee.fr | 8.65/10 | 25,500 | 15,430 | Jun 2024 |
| 51 | cuny.edu | 8.65/10 | 294,000 | 61,388 | May 2025 |
| 52 | usp.br | 8.65/10 | 1 | 19 | May 2023 |
| 53 | gencat.cat | 8.63/10 | 86 | 174 | Dec 2025 |
| 54 | tudelft.nl | 8.63/10 | 23,300 | 7,683 | Jul 2022 |
| 55 | com.de | 8.62/10 | 5 | 14 | Jun 2022 |
| 56 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Sep 2025 |
| 57 | unibe.ch | 8.60/10 | 4,700 | 1,336 | May 2026 |
| 58 | krakow.pl | 8.59/10 | 690 | 649 | Oct 2021 |
| 59 | sverigesradio.se | 8.59/10 | 7,100 | 9,581 | Apr 2026 |
| 60 | csic.es | 8.59/10 | 1,200 | 2,107 | Oct 2023 |
| 61 | univie.ac.at | 8.58/10 | 10,000 | 1,103 | Sep 2023 |
| 62 | alberta.ca | 8.58/10 | 115,900 | 65,281 | Dec 2024 |
| 63 | cnr.it | 8.57/10 | 810 | 1,174 | Oct 2021 |
| 64 | doaj.org | 8.56/10 | 36,200 | 25,008 | Apr 2024 |
| 65 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Apr 2022 |
| 66 | nhl.com | 8.55/10 | 9,107,800 | 775,789 | Feb 2026 |
| 67 | belgium.be | 8.55/10 | 20,400 | 1,736 | Jun 2025 |
| 68 | nato.int | 8.55/10 | 340,700 | 121,553 | Apr 2023 |
| 69 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Oct 2022 |
| 70 | missouri.edu | 8.55/10 | 111,700 | 10,535 | Feb 2025 |
| 71 | uvic.ca | 8.54/10 | 44,200 | 19,833 | Apr 2025 |
| 72 | ubisoft.com | 8.53/10 | 983,500 | 199,233 | Nov 2021 |
| 73 | za.com | 8.53/10 | - | - | Aug 2022 |
| 74 | spb.ru | 8.53/10 | - | - | Nov 2022 |
| 75 | uni-stuttgart.de | 8.53/10 | 1,600 | 2,181 | Aug 2025 |
| 76 | uni-hamburg.de | 8.53/10 | 5,500 | 3,110 | Mar 2022 |
| 77 | fsu.edu | 8.53/10 | 247,200 | 10,316 | Mar 2025 |
| 78 | upm.es | 8.52/10 | 2,100 | 1,692 | Jan 2023 |
| 79 | wpml.org | 8.51/10 | 2,100 | 2,370 | Aug 2024 |
| 80 | gov.ro | 8.51/10 | 640 | 166 | Nov 2021 |
| 81 | unizar.es | 8.51/10 | 280 | 138 | Feb 2022 |
| 82 | artificialintelligenceact.eu | 8.51/10 | 19,800 | 12,529 | Aug 2025 |
| 83 | umontreal.ca | 8.50/10 | 3,700 | 761 | Jan 2026 |
| 84 | hostingersite.com | 8.49/10 | - | - | May 2025 |
| 85 | uni-goettingen.de | 8.49/10 | 6,400 | 3,874 | Nov 2021 |
| 86 | tu-dresden.de | 8.49/10 | 2,300 | 3,199 | Aug 2022 |
| 87 | uni-koeln.de | 8.49/10 | 1,200 | 427 | Nov 2021 |
| 88 | panasonic.com | 8.48/10 | 42,700 | 27,959 | Mar 2026 |
| 89 | ilsole24ore.com | 8.48/10 | 3,500 | 7,210 | Nov 2023 |
| 90 | gov.wales | 8.48/10 | 37,700 | 16,015 | Aug 2022 |
| 91 | tno.nl | 8.48/10 | 4,400 | 2,178 | Jul 2023 |
| 92 | gva.es | 8.47/10 | 490 | 1,924 | Oct 2023 |
| 93 | poznan.pl | 8.47/10 | 320 | 564 | Oct 2021 |
| 94 | de.com | 8.46/10 | - | 2 | Dec 2021 |
| 95 | core.ac.uk | 8.46/10 | 26,700 | 88,757 | Feb 2025 |
| 96 | queensu.ca | 8.46/10 | 44,000 | 26,583 | Jul 2024 |
| 97 | gov.hu | 8.44/10 | - | - | Apr 2026 |
| 98 | laposte.fr | 8.44/10 | 16,300 | 4,767 | May 2022 |
| 99 | ulaval.ca | 8.44/10 | 2,800 | 1,607 | Jun 2023 |
| 100 | us.es | 8.43/10 | 1,400 | 3,306 | Nov 2021 |
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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