VeriSign is described as 'Authentication Services provides solutions that allow companies & consumers to engage in communications & commerce online with confidence'. 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 solutions. The best alternative is Let's Encrypt, which is both free and Open Source. Other great sites and apps similar to VeriSign are xca - X Certificate and Key management (Free, Open Source), SSL For Free (Free, Open Source), ZeroSSL (Freemium) and COMODO SSL (Paid).
SSL2BUY is the foremost SSL certificate provider of online security solutions for businesses. They offers trusted AlphaSSL, Comodo, GeoTrust, GlobalSign, Thawte, RapidSSL & Symantec SSL certificates at discounted price.
SSLTrust provides SSL Certificates to help encrypt, secure and enhance your customer trust. We have well established partnerships with leading Authorities including Comodo, GeoTrust, Symantec and DigiCert. And we bring you the leading products and solutions at fantastic prices.
PKI solution based on Microsoft AD CS (Active Directory Certificate Services) offers a affordable and powerful digital certificates environment, however sometimes it can be challenging to use without additional tools (3rd party utilities or scripts).
MEO is easy file encryption software for Mac or Windows that will encrypt or decrypt files of any type. Protect sensitive data against unauthorized viewers with the latest data encryption technologies to keep your important documents safe and secure.
The Dogtag Certificate System is an enterprise-class open source Certificate Authority (CA). It supports all aspects of certificate lifecycle management, including key archival, OCSP and smartcard management, and much more.