Lets Encrypt

Category - Certificate Authority

Let's Encrypt is a free, automated, and open certificate authority brought to you by the nonprofit Internet Security Research Group (ISRG).



We have discovered 38,041,270 live websites that are using Lets Encrypt.

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Technology usage statistics

Websites using Lets Encrypt38,041,270 websites
Most popular in the country US
Market position in Certificate Authority#1
Market share in Certificate Authority49.92%

Technology adoption

Recent changes in Lets Encrypt usage. (See Lets Encrypt Usage Changes report)
Websites that added Lets Encrypt+5,738,218
Websites that dropped Lets Encrypt-5,035,595

Distribution by websites popularity

Lets Encrypt detection in the top websites by popularity
Top 10k sites2,191 websites
Top 100k sites30,419 websites
Top 1m sites430,480 websites

Websites utilizing Lets Encrypt

Top websites that use Lets Encrypt

See full domain list
Flat price per the report, subscription is not required.

Market Share

Lets Encrypt market share within the Certificate Authority category

Geographical Distribution

Technology usage distribution by websites across the globe.






Alternative Technologies


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