AboutSSL is described as 'Ll about SSL Certificate Reviews, Comparison, Installation Guides & Error Fixing Tricks. It Helps Your Site to Enjoy the Highest Security Levels' and is a certificate authority in the security & privacy category. There are more than 10 alternatives to AboutSSL, not only websites but also apps for a variety of platforms, including Windows, Mac, Chrome OS and Linux apps. The best AboutSSL alternative is Let's Encrypt, which is both free and Open Source. Other great sites and apps similar to AboutSSL are EncryptSSL, SSL For Free, ZeroSSL and Verisign.