Based on data collected through builtwith.com on the top 1 million websites. Lets Encrypt cam e in 2nd and Cloudflare SSL came third.
An indication there is growing adoption of free SSL certificates among the top websites or the best websites in the world as per Alexa Rank.
Name | Number of Websites | Market share % |
SSL by Default | 625,736 | 62.57 |
LetsEncrypt | 309,900 | 30.99 |
Comodo SSL | 142,069 | 14.21 |
Cloudflare SSL | 141,272 | 14.13 |
Comodo PositiveSSL | 138,473 | 13.85 |
DigiCert SSL | 95,118 | 9.51 |
GoDaddy SSL | 59,530 | 5.95 |