Domain Comparison

Compare two domains using the same normalized intelligence data — registration, DNS, SSL, website status, email configuration, and overall health score.

What is a domain comparison tool?

A domain comparison tool puts two domains side by side and shows how they differ on the things that matter technically: registration, DNS, hosting network, website status, SSL and email security. Instead of running a dozen separate lookups for each domain and comparing notes, you get one table with a clear match column.

It is useful when you are choosing between two domains to buy, checking a competitor, or making sure two of your own domains are set up consistently.

How the domain comparison works

For each domain, the tool collects the same data as our Complete Domain Report: the registration record, DNS answers, the IP address and its network, an HTTP request to the website, the SSL certificate and the email authentication records. The two sets of results are then lined up row by row.

The match column only compares values where "same" or "different" means something, such as the registrar or the nameservers. Rows like age and IP address are shown for reference, because two different domains are expected to differ there.

How to compare two domains

  1. Enter the first domain, for example example.com.
  2. Enter the second domain, for example example.net.
  3. Press Compare and wait a few seconds while both domains are checked.
  4. Read the table row by row and use the match column to spot differences quickly.

What each comparison row means

Health score, age and expiry

The health score is the same weighted technical score as our Domain Health Check. Age shows how long each domain has been registered, and expiry shows the days remaining before renewal.

Registrar, nameservers and DNSSEC

These show who manages each registration, which DNS service answers for it and whether the registry reports DNSSEC signing. Matching values often suggest the same owner or agency.

IP, website, SSL and email security

The IP row shows each domain's address and network. Website status shows the HTTP code returned. SSL shows whether a trusted certificate was presented. Email security shows whether both SPF and DMARC are in place.

Common uses for comparing domains

  • Choosing between two available or second-hand domains.
  • Benchmarking your setup against a competitor's.
  • Checking that a main domain and its country or brand variants match.
  • Confirming a migration copied DNS, SSL and email settings correctly.

Tips for a fair domain comparison

Compare like with like. A shop and a parked domain will naturally differ on the website and email rows, so those differences say little on their own. "Same" in the match column is not automatically good either: two domains can both lack a trusted certificate or both have unreachable websites. Read each row's values as well as the match result.

If you manage several sites, comparing your main domain with a newer one is a quick way to find settings that were never copied across, such as DMARC, a second nameserver or DNSSEC. Run the comparison again after each fix to confirm the gap has closed.

Common problems and fixes

One domain shows Unavailable for SSL. The site may not serve HTTPS, or the connection failed. Run the SSL Checker on that domain for details.

Website status says Not reachable. The server did not answer in time or the domain has no web hosting. That is common for email-only or parked domains.

The comparison is slow. Two full reports are gathered, so it takes longer than a single lookup. Please wait rather than refreshing the page.

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Frequently asked questions

How do I compare two domain names?

Enter both domains and press Compare. The tool checks each one for registration details, DNS, IP network, website status, SSL and email security, then shows the results side by side with a match column. It takes a few seconds because two full sets of checks run behind the scenes.

What does the match column mean?

It shows whether the two domains have the same value in rows where that is meaningful, such as registrar, nameservers or DNSSEC. Rows like age, expiry and IP address are shown for reference only, because two different domains are normally expected to differ there.

Can I compare more than two domains?

This tool compares two at a time so the table stays readable. To check a longer list of domains for registration status, registrar and expiry dates, use our Bulk Domain Lookup, which accepts up to 20 domains in one go and offers a CSV export.

Why do two domains show the same nameservers?

They use the same DNS provider. That can mean the same owner or agency manages both, but large DNS services host millions of domains, so shared nameservers on a popular provider say little on their own. Matching registrar and nameservers together is a stronger hint.

What is the health score in the comparison?

It is the same weighted technical score used by our Domain Health Check, built from nine checks covering registration, expiry, DNS, DNSSEC, nameservers, website, SSL, SPF and DMARC. Checks that cannot be evaluated are left out of the score rather than counted as failures.

Does the comparison tell me which domain is better for SEO?

No. It compares technical configuration, not search rankings, backlinks or content quality. A domain with a higher technical score is better maintained, but rankings depend on many factors this tool does not measure, such as the quality of the content, the site's history and how other websites link to it.

Why does one domain show Not reachable?

The website did not respond to a standard request in time. The domain may have no web hosting, may be used only for email, may be parked, or its server may have been down at that moment. Try the Website Status Checker for more detail.