What are some alternatives?
When comparing CAcert and SSL2BUY, 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
COMODO SSL - Buy your Comodo SSL certificates directly from the No.1 Certificate Authority powered by Sectigo (formerly Comodo CA). Fast service with 24/7 support. Over 20 years of SSL Certificate Authority!
Cheap SSL Shop - Cheap SSL Shop is the cheapest SSL certificate provider.
VeriSign - VeriSign Authentication Services provides solutions that allow companies & consumers to engage...
SSL For Free - Free SSL Certificate issued in less than a minute.