Certificate Authority

Certificate authority (CA) is an entity that issues digital certificates.


We have discovered 42,661,486 live websites that use Certificate Authority.

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Certificate Authority usage statistics

Total sites that use Certificate Authority42,661,486 websites
Percentage of website that use category69.06%
Number of technologies in Certificate Authority category54
Category leader Lets Encrypt
Fastest Growing Technology Sectigo
Most Popular in Country United States

Website Distribution by Country

Number of websites using Certificate Authority
United States16,859,413 websites


Germany5,095,745 websites
France1,926,441 websites
Japan1,444,006 websites
Russia1,406,637 websites
Netherlands1,307,747 websites
Israel1,195,390 websites
GB1,191,880 websites
Italy977,744 websites
Canada752,748 websites

Website Distribution by TLD

Number of websites using Certificate Authority
.com18,817,481 websites
.de3,193,971 websites
.org1,898,773 websites
.net1,444,377 websites
.ru1,181,776 websites
.nl1,161,940 websites
.co.uk1,044,905 websites
.it893,796 websites
.fr765,233 websites
.pl624,409 websites

Top Technologies

Leading technologies in the Certificate Authority category (out of 54 total).
TechnologyWebsitesMarket ShareRecent changes
Lets Encrypt29,243,186 68.55% +13,820
Sectigo3,295,234 7.72% +348,823
GoDaddy CA2,956,124 6.93% +54,793
DigiCert2,576,760 6.04% -405,031
Encryption Everywhere CA1,069,375 2.51% -349,782
GlobalSign CA950,679 2.23% -31,818
AWS Certificate Manager903,138 2.12% +5,415
RapidSSL CA534,031 1.25% -2,399
ZeroSSL CA521,092 1.22% +51,315
AlphaSSL CA481,621 1.13% -13,219
Actalis CA337,499 0.79% +4,334
Starfield CA336,428 0.79% -42,795
GeoTrust CA298,091 0.70% -25,715
Certum CA160,886 0.38% +7,865
Thawte CA145,485 0.34% -3,358
See full technology list

Top technology switches

Number of websites that recently switched technologies within category

FromToWebsite Count
DigiCert Sectigo325,042
Encryption Everywhere CA Sectigo277,204
Lets Encrypt GoDaddy CA80,547
cPanel CA Lets Encrypt61,857
Sectigo Lets Encrypt44,104
GoDaddy CA Lets Encrypt40,173

Websites utilizing Certificate Authority

Top websites that use Certificate Authority
DomainCountryRankContacts
facebook.com United States2
wordpress.org United States4
s.w.org United States5
twitter.com United States7
instagram.com United States9
gmpg.org Canada10
See full domain list