Websites Powered by reCAPTCHA
5,482,178 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
May 2022
Jun 2024
Jun 2026
Domains observed using reCAPTCHA in each month's HTTP Archive crawl,
Apr 2018 to Jun 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 1,963,957 reCAPTCHA sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
603,209
India
224,820
United Kingdom
207,765
Japan
199,902
France
176,039
Canada
160,997
Brazil
159,360
Spain
153,221
Sites using reCAPTCHA by audience country, Chrome UX Report.
Top sites by authority
9+
43% · 160 of 372 sites
8+
39% · 2,971 of 7,677 sites
7+
29% · 13,304 of 45,712 sites
6+
25% · 27,590 of 110,136 sites
5+
20% · 50,540 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 | weibo.com | 9.04/10 | 1,200 | 638 | Nov 2020 |
| 109 | bizjournals.com | 9.04/10 | 814,500 | 869,896 | Apr 2022 |
| 110 | windows.net | 9.04/10 | - | - | Dec 2021 |
| 111 | wpengine.com | 9.04/10 | 66,500 | 17,967 | Mar 2020 |
| 112 | readthedocs.io | 9.04/10 | - | - | Apr 2022 |
| 113 | theverge.com | 9.04/10 | 1,079,000 | 727,363 | Apr 2022 |
| 114 | deloitte.com | 9.04/10 | 393,900 | 170,966 | Dec 2021 |
| 115 | telegraph.co.uk | 9.04/10 | 700,500 | 680,508 | Oct 2018 |
| 116 | cambridge.org | 9.04/10 | 633,100 | 518,312 | Oct 2018 |
| 117 | mayoclinic.org | 9.04/10 | 61,726,300 | 4,533,343 | Oct 2018 |
| 118 | sec.gov | 9.04/10 | 1,451,500 | 433,666 | Sep 2022 |
| 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 | cpanel.net | 9.03/10 | 20,300 | 4,682 | Oct 2018 |
| 123 | python.org | 9.03/10 | 408,700 | 39,359 | Dec 2019 |
| 124 | oup.com | 9.03/10 | 570 | 405 | Apr 2022 |
| 125 | lemonde.fr | 9.03/10 | 267,300 | 164,559 | Jun 2019 |
| 126 | cbc.ca | 9.03/10 | 1,276,900 | 807,604 | Apr 2022 |
| 127 | b-cdn.net | 9.02/10 | - | - | Sep 2021 |
| 128 | qualtrics.com | 9.02/10 | 359,600 | 56,890 | Mar 2022 |
| 129 | ahrefs.com | 9.02/10 | 299,600 | 49,312 | Nov 2021 |
| 130 | gartner.com | 9.02/10 | 521,600 | 122,476 | Dec 2021 |
| 131 | mdpi.com | 9.02/10 | 1,843,600 | 1,928,740 | Dec 2021 |
| 132 | dhs.gov | 9.02/10 | 1,505,600 | 304,662 | Apr 2020 |
| 133 | ieee.org | 9.02/10 | 37,200 | 20,161 | Aug 2018 |
| 134 | columbia.edu | 9.02/10 | 770,900 | 41,349 | Aug 2018 |
| 135 | independent.co.uk | 9.02/10 | 272,800 | 191,386 | May 2021 |
| 136 | senate.gov | 9.02/10 | 1,931,200 | 175,699 | Oct 2018 |
| 137 | leadconnectorhq.com | 9.01/10 | 220 | 108 | Jan 2026 |
| 138 | atlassian.com | 9.01/10 | 1,053,700 | 178,447 | Nov 2019 |
| 139 | netlify.app | 9.01/10 | 2 | 2 | Sep 2020 |
| 140 | unicef.org | 9.01/10 | 286,700 | 135,578 | Oct 2018 |
| 141 | bbb.org | 9.01/10 | 8,953,200 | 3,866,716 | Nov 2020 |
| 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 | sanity.io | 8.96/10 | 18,900 | 6,254 | Apr 2025 |
| 185 | samsung.com | 8.96/10 | 5,696,100 | 1,599,814 | Feb 2019 |
| 186 | gofundme.com | 8.96/10 | 600,400 | 209,867 | Aug 2023 |
| 187 | globenewswire.com | 8.96/10 | 279,600 | 270,662 | Jun 2020 |
| 188 | webmd.com | 8.96/10 | 24,603,100 | 3,720,411 | Nov 2018 |
| 189 | theconversation.com | 8.96/10 | 1,494,300 | 816,726 | Oct 2018 |
| 190 | google.ca | 8.96/10 | 7,500 | 2,795 | Jul 2022 |
| 191 | washington.edu | 8.96/10 | 668,000 | 107,419 | Oct 2018 |
| 192 | umn.edu | 8.96/10 | 78 | 49 | Oct 2018 |
| 193 | change.org | 8.96/10 | 209,800 | 138,005 | Dec 2018 |
| 194 | booking.com | 8.95/10 | 13,584,300 | 2,384,931 | Oct 2018 |
| 195 | ebay.com | 8.95/10 | 59,444,100 | 21,368,147 | Oct 2018 |
| 196 | inc.com | 8.95/10 | 361,900 | 258,701 | Sep 2020 |
| 197 | indiatimes.com | 8.95/10 | 55,100 | 73,928 | Dec 2018 |
| 198 | webflow.io | 8.95/10 | 79 | 1 | Jun 2019 |
| 199 | science.org | 8.95/10 | 873,100 | 480,935 | Jun 2022 |
| 200 | lefigaro.fr | 8.95/10 | 18,400 | 38,648 | Apr 2019 |
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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