All SSL certificates are a combination of a particular Validation Level + Type. There are certain exceptions though. For example, you cannot purchase a wildcard version of an Extended Validation certificate as these are not permitted by the guidelines which govern the issuance of EV certificates.
The rest of this page provides a quick overview of the validation levels and certificate types.
A single domain certificate allows a customer to secure one Fully Qualified Domain Name on a single certificate. Single domain certificates are available in DV, OV and EV variants at a variety of price points and warranty levels.
The straightforward nature of the single domain certificate makes it ideal for small to medium sized businesses managing a limited number of websites. However, businesses that operate or anticipate operating multiple websites may benefit from the added flexibility, convenience and savings offered by wildcard or multi-domain certificates.
Examples: Instant SSL, Comodo SSL certificate, Positive SSL certificate
For growing online businesses, Wildcard certificates provide a flexible, cost effective alternative to multiple single certificate purchases.
Examples: Comodo SSL Wildcard, Positive SSL Wildcard
As the name suggests, a Multi-Domain certificate allows website owners to secure multiple, distinct domains on a one certificate. Customers can easily add or remove domains at any time.
This simplifies management because admins need only keep track of a single certificate with a unified expiry date for all domains instead of keeping tabs on multiple certificates. In addition, Multi-Domain Certificates usually represent a cost saving over the price of individual certificates.
Examples: Comodo Multi-Domain, Enterprise EV Multi-Domain, Positive SSL Multi-Domain
EV certificates provide the highest levels of security, trust and customer conversion for online businesses. EV certificates are issued only after the issuing CA has conducted rigorous background checks on the company according to the guidelines laid out by the Certificate Authority/Browser (CA/B) Forum. Because of this, EV certificates contain a unique differentiator designed to clearly communicate the trustworthiness of the website to its visitors. Whenever somebody visits a website that uses an EV certificate, the address bar will turn green in major browsers such as Internet Explorer, Firefox and Chrome. EV certificates are used by all major online retailers and banks and are highly recommended for businesses that wish to immediately build customer trust in their site.
Available in single-domain and MDC certificate types.
Examples: Positive EV SSL Certificate, Enterprise EV Multi-Domain Certificate
OV certificates include full business and company validation from a certificate authority using currently established and accepted manual vetting processes. Because of this, these certificates provide significantly higher levels of trust and security than DV certificates. They feature a faster issuance time than EV certs but do not display the company name or green security indicator in the address bar of internet browsers.
Available in single-domain, wildcard and MDC certificate types.
Examples: Instant SSL, Premium SSL Wildcard
DV certificates provide the same high levels of data encryption as EV and OV but do not provide assurance about the identity of the business behind the website. Whereas EV and OV certificates are only issued after the applicant organization has been manually vetted by a certificate authority, DV certs are issued after domain control has been established using an automated, online process. DV certs are a popular choice among small-medium sized web sites because of their faster issuance times and lower price points.
Examples: Comodo SSL, Comodo SSL Wildcard, Comodo SSL UCC, Positive SSL, Positive MDC, Positive Wildcard
Unified Communications Certificates are specifically designed to secure Microsoft® Exchange and Office Communications environments. UC certificates use the Subject Alternative Name (SAN) field to allow customers to include up to 100 domains on a single certificate - eliminating the need for different IP addresses per website that would be required otherwise. UC Certificates also support the Microsoft Exchange Autodiscover service, a powerful feature which greatly eases client administration. As with MDCs, a single UCC can greatly reduce SSL management duties while allowing customers to realize cost savings over individual purchases.
Available in OV and DV validation levels
Examples: Unified Communications Certificate, Comodo SSL Unified Communications Certificate
Want more information to compare our certificates? Check out our downloadable PDFs below: