This article discusses the differences between SSL certificates provided by Let's Encrypt and those provided by traditional CA (certificate authority) providers.
The Let's Encrypt initiative makes creating and installing SSL certificates a simple task. They are also free, so you may ask yourself, “why would I ever pay for an SSL certificate from another provider?”
Although Let's Encrypt SSL certificates provide basic SSL encryption, they lack many of the benefits of certificates issued by established CA (certificate authority) SSL providers, including:
SSL certificate options: Let's Encrypt only offers domain-validated certificates (DV). If you need the extra security of an extended validation certificate (EV) for your site, you must purchase one from a traditional CA provider. Additionally, Let's Encrypt does not offer wildcard or multi-domain certificates.