Websites Powered by UserZoom
163 websites tracked using UserZoom (A/B Testing) · www.userzoom.com
UserZoom is a tool for running A/B and multivariate experiments to compare page variants. Its official site is userzoom.com. PoweredBy tracks the websites that use UserZoom 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
Core Web Vitals
Median site among 93 UserZoom sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
83
India
64
United Kingdom
60
Canada
59
Mexico
54
Philippines
54
Spain
52
Germany
51
Sites using UserZoom by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Education | <0.01% | 2 |
| Arts and entertainment | <0.01% | 1 |
Share of each industry's websites with a detected stack that use UserZoom; industries come from what sites declare in their own structured data.
Top sites by authority
The share of the web's most authoritative domains, by Open Page Rank tier, seen running UserZoom in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using UserZoom
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | noaa.gov | 9.07/10 | 1,233,000 | 125,205 | Sep 2024 |
| 2 | mayoclinic.org | 9.04/10 | 60,718,700 | 3,415,662 | Sep 2021 |
| 3 | redhat.com | 8.83/10 | 288,100 | 74,088 | Jun 2025 |
| 4 | pmi.org | 8.55/10 | 437,200 | 66,783 | Sep 2021 |
| 5 | scholastic.com | 8.41/10 | 232,000 | 63,274 | Sep 2021 |
| 6 | statefarm.com | 8.33/10 | 2,260,400 | 169,108 | Aug 2021 |
| 7 | tec.mx | 7.89/10 | 5,800 | 3,653 | Sep 2021 |
| 8 | hmhco.com | 7.69/10 | 145,500 | 29,215 | Sep 2021 |
| 9 | scrippsnews.com | 7.65/10 | 97,500 | 79,168 | Jun 2024 |
| 10 | ascension.org | 7.63/10 | - | - | Feb 2026 |
| 11 | hee.nhs.uk | 7.51/10 | 4,400 | 2,817 | Feb 2023 |
| 12 | altroconsumo.it | 7.49/10 | 330 | 973 | Sep 2021 |
| 13 | tmj4.com | 7.39/10 | 106,400 | 61,696 | Oct 2021 |
| 14 | cap.org | 7.36/10 | 25,000 | 9,968 | Sep 2021 |
| 15 | smcgov.org | 7.27/10 | 228,100 | 32,322 | Mar 2022 |
| 16 | c1.statefarm | 7.12/10 | - | - | May 2023 |
| 17 | fpl.com | 7.06/10 | 420,700 | 33,041 | Nov 2022 |
| 18 | vwfs.de | 7.04/10 | 650 | 3,559 | Mar 2022 |
| 19 | userzoom.com | 7.02/10 | - | - | Sep 2021 |
| 20 | hertfordshire.gov.uk | 7.02/10 | 3,000 | 3,474 | Aug 2021 |
| 21 | projectmanagement.com | 7.02/10 | 67,100 | 21,737 | Sep 2021 |
| 22 | smud.org | 6.86/10 | 100,900 | 17,191 | Sep 2021 |
| 23 | rossu.edu | 6.01/10 | 260 | 45 | Oct 2021 |
| 24 | cinfin.com | 5.96/10 | 19,600 | 4,760 | Oct 2021 |
| 25 | atombank.co.uk | 5.93/10 | 980 | 508 | Sep 2021 |
| 26 | myherbalife.com | 5.40/10 | 16,300 | 4,265 | Aug 2021 |
| 27 | contensis.com | 5.31/10 | 3,200 | 538 | Nov 2022 |
| 28 | fideliscare.org | 5.30/10 | 87,800 | 25,341 | Sep 2021 |
| 29 | aucmed.edu | 4.76/10 | 69,800 | 11,336 | Oct 2021 |
| 30 | tecmilenio.mx | 4.72/10 | - | - | Nov 2022 |
| 31 | k12jobspot.com | 4.69/10 | - | - | Sep 2021 |
| 32 | foundationprogramme.nhs.uk | 4.69/10 | - | - | Feb 2023 |
| 33 | fplmaps.com | 3.98/10 | - | - | Nov 2023 |
| 34 | vwfs.it | 3.31/10 | - | - | Aug 2021 |
| 35 | bankofapis.com | 2.88/10 | 30 | 74 | Aug 2022 |
| 36 | vwfs.pt | 2.83/10 | - | - | Jan 2025 |
| 37 | poweringflorida.com | 2.68/10 | - | - | Aug 2022 |
| 38 | statweb.jp | 1.65/10 | - | - | Sep 2021 |
| 39 | statefarmgamerhood.com | 0.59/10 | - | - | Aug 2025 |
| 40 | myherbalife.by | 0.44/10 | - | - | Sep 2021 |
| 41 | statefarmactivations.com | 0.29/10 | - | - | Jun 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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