Types of SSL Certificates and How to Choose

By Validation Level

The validation level determines what the Certificate Authority checks before issuing the certificate — and what information ends up embedded in it. This is the most important dimension to get right, because it directly affects how much trust your certificate communicates to visitors.

DV — Domain Validation is the entry-level option. The CA verifies only that you control the domain — no company information is checked and no paperwork is required. Issuance is fully automated and typically takes 5 to 10 minutes. DV certificates provide exactly the same encryption as OV or EV, but they carry no organizational identity information. Anyone looking at the certificate will see the domain name but nothing about who is behind it.

DV is the right choice for blogs, personal websites, landing pages, internal tools, and any project where the primary goal is encryption rather than identity verification.

OV — Organization Validation adds a layer of identity verification. The CA confirms that a legitimate, registered organization is behind the domain — checking business registration details, address, and contact information. Company details are embedded in the certificate itself, making them visible to anyone who inspects it. Issuance takes 1 to 3 business days.

OV is suited for business websites, customer portals, B2B platforms, and any service where users benefit from knowing a verified organization is behind the site.

EV — Extended Validation is the most rigorous level. The CA performs a comprehensive legal, operational, and physical verification of the organization — confirming legal name, registration status, operational address, and authorized representatives. The process is thorough by design: EV certificates are the standard for financial institutions, payment platforms, e-commerce stores, and other environments where the highest level of trust is expected. Issuance typically takes 2 to 7 business days.

One important limitation: EV certificates are not available in Wildcard form. If you need EV-level trust across multiple subdomains, you will need individual or Multi-Domain EV certificates.

By Domain Coverage

Once you have chosen a validation level, the second dimension is how many domains and subdomains the certificate needs to cover.

Single-Domain certificates cover exactly one domain or subdomain — for example, example.com or shop.example.com. They are straightforward and cost-effective when you only have one site to secure.

Wildcard certificates cover a domain and an unlimited number of subdomains at one level — for example, a certificate for *.example.com covers shop.example.com, mail.example.com, blog.example.com, and any other subdomain you create. Wildcards are available at DV and OV levels — there is no EV Wildcard. They are ideal when you have many subdomains or expect to add new ones over time.

Multi-Domain (SAN) certificates let you secure multiple completely different domains within a single certificate — up to 250 domains. They are available at DV, OV, and EV levels, making them a flexible option for organizations managing several separate domains or brands.

How to Choose

Start with the validation level. Ask yourself: does your audience need to see verified organizational identity in the certificate, or is encryption alone sufficient? For public-facing business services, OV or EV is the stronger choice. For personal projects, internal tools, or anything where speed of issuance matters most, DV is sufficient.

Then consider coverage. If you run a single site, a Single-Domain certificate is all you need. If you have or expect multiple subdomains under one domain, a Wildcard saves time and cost. If you manage several different domains, a Multi-Domain certificate keeps everything under one renewal.

✔ Tip: When in doubt, think about what your users will expect. A payment page or a business login portal signals more trust with an OV or EV certificate. A personal portfolio or a development environment does not need it.

What a Certificate Contains

The contents of an issued certificate depend on its type. All certificates include the domain name(s) covered, the public key, the validity period, and the issuing Certificate Authority. OV and EV certificates additionally contain verified organization details — company name, country, and city of registration — embedded by the CA after verification.

You can inspect the full contents of any certificate by clicking the padlock icon in your browser's address bar and viewing the certificate details. This is also a useful way to verify that a certificate has been issued correctly after installation.