What are some alternatives?
When comparing ClickSSL and FileVault, you can also consider the following products
Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
VeraCrypt - When you need to know that your information is secure, VeraCrypt offers an added layer of protection. Their encrypting process keeps your files and data safe from prying eyes.
SSL2BUY - SSL2BUY is the foremost SSL certificate provider of online security solutions for businesses.
Tor - The Tor Project's free software protects your privacy online. Site blocked? Email [mailto:[email protected]] for help downloading Tor Browser.
Digicert - Encryption & Authentication
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.