What are some alternatives?
When comparing ComodoSSLstore and ClickSSL, 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).
SSL For Free - Free SSL Certificate issued in less than a minute.
SSL2BUY - SSL2BUY is the foremost SSL certificate provider of online security solutions for businesses.
ZeroSSL - FREE SSL certificates issued instantly online with Free SSL Certificate Wizard.
Digicert - Encryption & Authentication
SafeCyberSSL - SafeCyberSSL is a platinum partner of leading Certificate Authorities.