A Certificate Authority (CA) is the company that actually issues the SSL certificates. Symantec, Thawte, GeoTrust, RapidSSL, and Comodo are all CAs, for example. We are a reseller of these CAs, meaning that we are able to offer the exact same certificate that you would get from buying direct, but at much lower prices. We are hooked up to the API of these CAs, which is how we are able to offer the exact same products. Because we buy in bulk, we are able to offer them at the significant discounts that you see. We also offer dedicated SSL support for every certificate we offer and can help walk you through the entire process, from purchasing to generation to issuance to installation and more.