What are some alternatives?
When comparing ComodoSSLstore and Digicert, 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).
ClickSSL - Buy Cheap SSL certificates from ClickSSL. Trusted brands Comodo, RapidSSL, GeoTrust, Thawte & Symantec SSL certificates available at cheapest price.
Comodo - Comodo, the leading Internet Security Provider offers Free Antivirus, SSL Certificate and other Internet Security related products with complete protection
SSL For Free - Free SSL Certificate issued in less than a minute.
VeriSign - VeriSign Authentication Services provides solutions that allow companies & consumers to engage...
ZeroSSL - FREE SSL certificates issued instantly online with Free SSL Certificate Wizard.