SSL Analysis & Certificate Guide

The CA verifies only ownership of the domain (via a DNS record or email). Issued within minutes and usually free (Let's Encrypt).

Advantage: Fast and free; the encryption strength is identical to the others.

Best suited to: Blogs, personal sites, portfolios and small business sites that collect no sensitive data.

Alongside the domain, the organization's legal existence is verified and the company name appears in the certificate details. Validation takes a few days and the certificate is paid.

Advantage: Shows visitors the site belongs to a legitimate business.

Best suited to: E-commerce, corporate sites, and platforms that collect information through logins or forms.

The strictest legal and operational review. It used to turn the address bar green; modern browsers have removed that visual, but the certificate still carries the strongest proof of identity in its details.

Advantage: Maximum corporate trust and the strongest distinction against phishing.

Best suited to: Banks, financial institutions, large e-commerce and organizations handling sensitive transactions.

In the form *.example.com, a single certificate protects all first-level subdomains of a domain (blog., shop., mail. and so on).

Advantage: Manage many subdomains with one certificate and one renewal.

Best suited to: Sites with many subdomains, SaaS dashboards and multi-region corporate setups.

The Subject Alternative Name field combines different domains (example.com, example.net, anothersite.com) on a single certificate.

Advantage: Gathers separate brands and domains onto one certificate, saving management effort and cost.

Best suited to: Organisations running several domains, and Microsoft 365/Exchange environments.