Which type of certificate would be best for a company that wants to secure multiple subdomains?

A Wildcard certificate would be the best choice for a company that wants to secure multiple subdomains because it simplifies the management of SSL/TLS certificates for various subdomains under a single main domain. For example, if the main domain is example.com, a Wildcard certificate can be used to secure *.example.com, which allows it to cover subdomains such as blog.example.com, shop.example.com, and mail.example.com without needing separate certificates for each one.

This approach not only saves time and effort in obtaining and renewing multiple certificates but also reduces costs, as there is only one certificate to manage. Wildcard certificates are widely supported and recognized, making them a suitable solution for companies dealing with multiple subdomains.

In contrast, SAN (Subject Alternative Name) certificates can also secure multiple domains but are typically used for different primary domains rather than subdomains of a single domain. Extended validation certificates are focused on providing a higher level of assurance and require a rigorous validation process, primarily intended for businesses wanting to demonstrate increased legitimacy rather than for managing multiple subdomains. Self-signed certificates, while useful for internal testing or development environments, do not offer the same level of trust and recognition as those issued by a Certificate Authority, making them less suitable for securing public-facing