Websites Powered by reCAPTCHA
5,543,355 websites tracked using reCAPTCHA (Security) · www.google.com
reCAPTCHA is a free Google service that protects websites from spam and abuse by distinguishing humans from bots, typically during form submission or login. Sites embed its script and challenge widget. It is one of the most common bot-protection tools online.
Usage trend
1M
2M
3M
Apr 2018
May 2020
Jun 2022
Jul 2024
Aug 2026
Domains observed using reCAPTCHA in each month's HTTP Archive crawl,
Apr 2018 to Aug 2026 · peak 2,150,463 in Apr 2024. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2 s
INP 75 ms
CLS 0
TTFB 900 ms
Median site among 1,928,020 reCAPTCHA sites with Chrome UX data, p75 values, Aug 2026.
Top countries
United States
534,273
India
197,700
United Kingdom
181,539
Japan
172,940
Brazil
145,709
France
145,372
Canada
138,940
Spain
131,068
Sites using reCAPTCHA by audience country, Chrome UX Report.
Top sites by authority
9+
43% · 160 of 372 sites
8+
39% · 2,957 of 7,677 sites
7+
29% · 13,189 of 45,712 sites
6+
25% · 27,222 of 110,136 sites
5+
20% · 49,830 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running reCAPTCHA in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using reCAPTCHA
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 101 | stackoverflow.com | 9.05/10 | 6,139,200 | 2,184,814 | Feb 2025 |
| 102 | tripadvisor.com | 9.05/10 | 163,456,300 | 21,362,855 | Nov 2020 |
| 103 | acm.org | 9.05/10 | 24,100 | 17,765 | May 2019 |
| 104 | vercel.app | 9.05/10 | - | - | May 2021 |
| 105 | worldbank.org | 9.05/10 | 711,400 | 193,830 | Feb 2019 |
| 106 | house.gov | 9.05/10 | 752,000 | 103,932 | Oct 2018 |
| 107 | free.fr | 9.05/10 | 3,400 | 1,262 | Oct 2018 |
| 108 | ed.gov | 9.05/10 | 1,229,500 | 99,935 | Oct 2018 |
| 109 | weibo.com | 9.04/10 | 1,200 | 638 | Nov 2020 |
| 110 | bizjournals.com | 9.04/10 | 814,500 | 869,896 | Apr 2022 |
| 111 | windows.net | 9.04/10 | - | - | Dec 2021 |
| 112 | wpengine.com | 9.04/10 | 66,500 | 17,967 | Mar 2020 |
| 113 | readthedocs.io | 9.04/10 | - | - | Apr 2022 |
| 114 | theverge.com | 9.04/10 | 1,079,000 | 727,363 | Apr 2022 |
| 115 | deloitte.com | 9.04/10 | 393,900 | 170,966 | Dec 2021 |
| 116 | telegraph.co.uk | 9.04/10 | 700,500 | 680,508 | Oct 2018 |
| 117 | cambridge.org | 9.04/10 | 633,100 | 518,312 | Oct 2018 |
| 118 | mayoclinic.org | 9.04/10 | 61,726,300 | 4,533,343 | Oct 2018 |
| 119 | ny.gov | 9.04/10 | 691,300 | 55,212 | Oct 2018 |
| 120 | justice.gov | 9.04/10 | 5,041,300 | 855,725 | Aug 2018 |
| 121 | census.gov | 9.04/10 | 1,526,700 | 227,460 | Jun 2026 |
| 122 | abc.net.au | 9.04/10 | 1,129,200 | 703,096 | Oct 2018 |
| 123 | cpanel.net | 9.03/10 | 20,300 | 4,682 | Oct 2018 |
| 124 | python.org | 9.03/10 | 408,700 | 39,359 | Dec 2019 |
| 125 | oup.com | 9.03/10 | 570 | 405 | Apr 2022 |
| 126 | lemonde.fr | 9.03/10 | 267,300 | 164,559 | Jun 2019 |
| 127 | cbc.ca | 9.03/10 | 1,276,900 | 807,604 | Apr 2022 |
| 128 | b-cdn.net | 9.02/10 | - | - | Sep 2021 |
| 129 | qualtrics.com | 9.02/10 | 359,600 | 56,890 | Mar 2022 |
| 130 | ahrefs.com | 9.02/10 | 299,600 | 49,312 | Nov 2021 |
| 131 | gartner.com | 9.02/10 | 521,600 | 122,476 | Dec 2021 |
| 132 | mdpi.com | 9.02/10 | 1,843,600 | 1,928,740 | Dec 2021 |
| 133 | dhs.gov | 9.02/10 | 1,505,600 | 304,662 | Apr 2020 |
| 134 | ieee.org | 9.02/10 | 37,200 | 20,161 | Aug 2018 |
| 135 | columbia.edu | 9.02/10 | 770,900 | 41,349 | Aug 2018 |
| 136 | independent.co.uk | 9.02/10 | 272,800 | 191,386 | May 2021 |
| 137 | senate.gov | 9.02/10 | 1,931,200 | 175,699 | Oct 2018 |
| 138 | leadconnectorhq.com | 9.01/10 | 220 | 108 | Jan 2026 |
| 139 | atlassian.com | 9.01/10 | 1,053,700 | 178,447 | Nov 2019 |
| 140 | netlify.app | 9.01/10 | 2 | 2 | Sep 2020 |
| 141 | unicef.org | 9.01/10 | 286,700 | 135,578 | Oct 2018 |
| 142 | ted.com | 9.01/10 | 390,200 | 133,376 | Sep 2020 |
| 143 | theatlantic.com | 9.01/10 | 865,300 | 436,432 | Oct 2018 |
| 144 | nbcnews.com | 9.01/10 | 7,240,000 | 2,091,036 | Feb 2020 |
| 145 | latimes.com | 9.01/10 | 3,917,700 | 1,979,297 | Oct 2018 |
| 146 | google.nl | 9.01/10 | 310 | 116 | Jul 2022 |
| 147 | investopedia.com | 9.01/10 | 14,836,000 | 1,675,793 | Oct 2018 |
| 148 | google.es | 9.01/10 | 2,500 | 1,269 | Jul 2022 |
| 149 | psu.edu | 9.01/10 | 581,600 | 94,595 | Oct 2018 |
| 150 | umich.edu | 9.01/10 | 36,500 | 1,974 | Oct 2018 |
| 151 | yale.edu | 9.01/10 | 177,900 | 6,885 | Oct 2018 |
| 152 | pbs.org | 9.01/10 | 10,732,500 | 2,329,939 | Aug 2020 |
| 153 | hugedomains.com | 9.00/10 | 52 | 120 | Jun 2021 |
| 154 | gitlab.com | 9.00/10 | 87,500 | 29,195 | Nov 2020 |
| 155 | uk.com | 9.00/10 | 2 | 12 | Jan 2019 |
| 156 | fastcompany.com | 9.00/10 | 580,900 | 399,386 | Nov 2018 |
| 157 | cnet.com | 9.00/10 | 6,706,300 | 2,666,781 | Apr 2022 |
| 158 | google.co.uk | 9.00/10 | 78,200 | 2,239 | Jul 2022 |
| 159 | upenn.edu | 9.00/10 | 179,200 | 5,457 | Oct 2018 |
| 160 | energy.gov | 9.00/10 | 1,887,700 | 301,694 | Aug 2022 |
| 161 | icann.org | 8.99/10 | 27,800 | 9,274 | Nov 2020 |
| 162 | patreon.com | 8.99/10 | 965,100 | 442,272 | May 2023 |
| 163 | square.site | 8.99/10 | 92,700 | 37,752 | Feb 2020 |
| 164 | fortune.com | 8.99/10 | 1,538,600 | 582,756 | Apr 2022 |
| 165 | netflix.com | 8.99/10 | 68,358,200 | 3,834,938 | Jul 2019 |
| 166 | google.it | 8.99/10 | 2,000 | 348 | Jul 2022 |
| 167 | service.gov.uk | 8.99/10 | - | - | Jun 2020 |
| 168 | archives.gov | 8.99/10 | 3,336,000 | 450,906 | Aug 2018 |
| 169 | va.gov | 8.99/10 | 3,933,900 | 1,032,734 | May 2019 |
| 170 | academia.edu | 8.99/10 | 199,400 | 452,382 | Nov 2018 |
| 171 | azureedge.net | 8.98/10 | - | - | Feb 2019 |
| 172 | marriott.com | 8.98/10 | 13,740,800 | 1,485,399 | Feb 2020 |
| 173 | ox.ac.uk | 8.98/10 | 214,200 | 93,016 | Oct 2018 |
| 174 | princeton.edu | 8.98/10 | 246,800 | 50,700 | Oct 2018 |
| 175 | texas.gov | 8.98/10 | 856,400 | 43,777 | Oct 2018 |
| 176 | nhk.or.jp | 8.98/10 | 2,800 | 716 | Dec 2024 |
| 177 | outbrain.com | 8.97/10 | 16,000 | 6,097 | Oct 2018 |
| 178 | cmu.edu | 8.97/10 | 436,800 | 81,774 | Aug 2018 |
| 179 | orcid.org | 8.97/10 | 75,800 | 43,570 | Oct 2018 |
| 180 | wisc.edu | 8.97/10 | 461,400 | 7,361 | Oct 2018 |
| 181 | britannica.com | 8.97/10 | 90,729,000 | 5,444,426 | May 2021 |
| 182 | clevelandclinic.org | 8.97/10 | 1,900 | 520 | Sep 2021 |
| 183 | federalregister.gov | 8.97/10 | 961,700 | 369,286 | Aug 2022 |
| 184 | samsung.com | 8.96/10 | 5,696,100 | 1,599,814 | Feb 2019 |
| 185 | gofundme.com | 8.96/10 | 600,400 | 209,867 | Aug 2023 |
| 186 | globenewswire.com | 8.96/10 | 279,600 | 270,662 | Jun 2020 |
| 187 | webmd.com | 8.96/10 | 24,603,100 | 3,720,411 | Nov 2018 |
| 188 | theconversation.com | 8.96/10 | 1,494,300 | 816,726 | Oct 2018 |
| 189 | google.ca | 8.96/10 | 7,500 | 2,795 | Jul 2022 |
| 190 | washington.edu | 8.96/10 | 668,000 | 107,419 | Oct 2018 |
| 191 | umn.edu | 8.96/10 | 78 | 49 | Oct 2018 |
| 192 | change.org | 8.96/10 | 209,800 | 138,005 | Dec 2018 |
| 193 | booking.com | 8.95/10 | 13,584,300 | 2,384,931 | Oct 2018 |
| 194 | ebay.com | 8.95/10 | 59,444,100 | 21,368,147 | Oct 2018 |
| 195 | inc.com | 8.95/10 | 361,900 | 258,701 | Sep 2020 |
| 196 | indiatimes.com | 8.95/10 | 55,100 | 73,928 | Dec 2018 |
| 197 | webflow.io | 8.95/10 | 79 | 1 | Jun 2019 |
| 198 | science.org | 8.95/10 | 873,100 | 480,935 | Jun 2022 |
| 199 | lefigaro.fr | 8.95/10 | 18,400 | 38,648 | Apr 2019 |
| 200 | nsw.gov.au | 8.95/10 | 75,300 | 73,181 | Sep 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) →
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