Verisign is described as '’s critical yet mostly invisible role – helping to maintain the security, stability and resiliency of the Domain Name System (DNS) and the internet – can sometimes be overshadowed by more visible aspects of the domain name business' and is an website. There are more than 25 alternatives to Verisign, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted apps. The best Verisign alternative is xca - X Certificate and Key management, which is both free and Open Source. Other great sites and apps similar to Verisign are EncryptSSL, Buypass, ZeroSSL and SSL For Free.