Market share by certificate issuer

Which CA secures the most websites?

DigiCert: 183 deep-scanned websites (23.8%)DigiCert24%Google Trust Services: 161 deep-scanned websites (21%)Google Trust Ser…21%Let's Encrypt: 143 deep-scanned websites (18.6%)Let's Encrypt19%Amazon: 95 deep-scanned websites (12.4%)Amazon12%GlobalSign: 77 deep-scanned websites (10%)GlobalSign10%Sectigo: 42 deep-scanned websites (5.5%)SectigoMicrosoft: 19 deep-scanned websites (2.5%)GoDaddy.com: 10 deep-scanned websites (1.3%)Apple: 5 deep-scanned websites (0.7%)Other: 33 deep-scanned websites (4.3%)Other
DigiCertGoogle Trust ServicesLet's EncryptAmazonGlobalSignSectigoMicrosoftGoDaddy.comAppleOther

DigiCert includes GeoTrust, Thawte, and RapidSSL.

Denominator: deep-scanned websites · n = 768 · top 1k

View as table
CategorySitesShare
DigiCert18323.8%
Google Trust Services16121%
Let's Encrypt14318.6%
Amazon9512.4%
GlobalSign7710%
Sectigo425.5%
Microsoft192.5%
GoDaddy.com101.3%
Apple50.7%
Other334.3%

Source: GeoTrust Research — The State of SSL/TLS, October 2026