SSL Certificate Types: DV, OV and EV Compared

All SSL/TLS certificates encrypt traffic the same way. Where they differ is how much the Certificate Authority checked before issuing — from confirming you control a domain to verifying your legal business identity. Those levels are DV, OV and EV.

What validation level actually means

When a Certificate Authority (CA) issues a certificate, it vouches that the requester is who they claim to be. The validation level describes how thorough that check was. Crucially, it has no effect on the strength of the encryption — a DV certificate protects data exactly as well as an EV one. What you’re paying more for with OV and EV is a stronger statement of identity, not stronger security.

Domain Validation (DV)

DV is the fastest and cheapest option, usually issued in minutes and fully automated. The CA only checks that you control the domain — typically by having you add a DNS record or place a file on the server. It doesn’t verify any business behind the site. This is the certificate type behind free providers like Let’s Encrypt, and it’s the right choice for blogs, portfolios, small business sites, and the vast majority of the web.

Organization Validation (OV)

OV adds a layer of human vetting. Before issuing, the CA confirms that your organisation is a real, registered legal entity — checking business registries and sometimes phoning you. Issuance takes days rather than minutes. The organisation’s name is embedded in the certificate details, so a visitor who inspects the certificate can see a verified company name. OV suits businesses and organisations that want that extra assurance recorded.

Extended Validation (EV)

EV is the most rigorous tier, following a standardised, in-depth vetting process that confirms your legal, physical and operational existence. It takes the longest and costs the most. Historically, EV certificates triggered a green company name in the address bar — but modern browsers removed that special treatment, so an EV site now looks the same as a DV one to a casual visitor. The verified identity still lives in the certificate, but its visual advantage has largely disappeared.

Single, wildcard and multi-domain

Separate from validation level is coverage. A single-domain certificate covers one hostname. A wildcard certificate (e.g. *.example.com) covers all subdomains at one level. A multi-domain (SAN) certificate covers several distinct domains at once. You can mix and match: for example, a wildcard DV certificate is common and inexpensive. Choose coverage based on how many hostnames you serve, and validation based on how much identity assurance you need.

Which should you pick?

For personal sites, blogs, small businesses and most e-commerce, a DV certificate — free and auto-renewing — is the sensible default. Choose OV or EV when a regulator, enterprise customer, or industry standard explicitly requires verified organisational identity, or when your internal policy calls for it. Whatever you pick, the more common mistakes are operational: letting the certificate expire, serving mixed content, or skipping security headers. Verify the whole setup with a free scan.

Frequently asked questions

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