Yes, that is correct. Let’s Encrypt is now growing at an exponential rate – providing free SSL to 70 Million domain.
Let’s Encrypt is a free, automated, and open certificate authority brought to you by the non-profit Internet Security Research Group (ISRG).
Let’s Encrypt provide two types of certificates. The standard single domain SSL and the Wildcard SSL, which covers not only a single domain, but all of its subdomains too. Both types of SSL certificates are issued for a period of 90 days. It can be renewed automatically or manually in your cPanel.