Let’s Encrypt is a free open Certificate Authority.
SSL Certificates · Root Authority
Get access to data on 116,950,829 websites that are LetsEncrypt Customers. We know of 80,543,239 live websites using LetsEncrypt and an additional 36,407,590 sites that used LetsEncrypt historically and 7,140,386 websites in the United States.
Get a list of 116,950,829 websites using LetsEncrypt which includes location information, hosting data, contact details, 80,543,239 currently live websites
and an additional 3,852,864 domains that redirect to sites in this list. 36,407,590 sites that used this technology previously and 7,140,386 websites in the United States currently using LetsEncrypt.