What are some alternatives?
When comparing ClickSSL and VeriSign, 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).
Digicert - Encryption & Authentication
SSL2BUY - SSL2BUY is the foremost SSL certificate provider of online security solutions for businesses.
DNSimple - Domain Name Service with low cost hosted DNS, an easy to use web interface, and a REST API for automation. Hosting DNS has never been so simple.
SafeCyberSSL - SafeCyberSSL is a platinum partner of leading Certificate Authorities.
Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.