Let’s Encrypt/stats

= Official stats = Let’s Encrypt provide some official statistics on the number of certificate that they deliver.

Ranking
Censys allows to get some statistics on the usage of Let’s Encrypt among the top 1 million websites.

Reports are build by querying the raw domain name. Some website are know to serve different certificates for the raw domain and the www prefix.

HTTPS
https://censys.io/domain/report?q=*&field=443.https.tls.certificate.parsed.issuer.organization.raw&max_buckets=

*: Old report based on intermediate certificate name. This affect rank as some authorities have multiple intermediates.

SMTP
https://censys.io/domain/report?q=*&field=25.smtp.starttls.tls.certificate.parsed.issuer.organization.raw&max_buckets=

*: Old report based on intermediate certificate name. This affect rank as some authorities have multiple intermediates.