Compare your domain's authority rank against a competitor's — see who's ahead.
Wondering why a competitor outranks you even though your content is just as good? Domain authority is usually the missing piece — and it's driven mainly by backlinks, not on-page content. This free Backlink Gap Checker compares your domain's authority rank against a competitor's side by side, using Common Crawl's real, independently measured web graph data — not an estimate. Enter both domains and see who's ahead in seconds, no sign-up required.
Add your own domain and the competitor you want to compare against. Just the bare domain — no need for https:// or www.
The tool checks Common Crawl's host-level web graph for both domains — a real, independently computed authority signal (harmonic centrality), not a guess based on traffic or age.
See both scores side by side immediately. If a domain hasn't been indexed by Common Crawl yet, the tool checks live rather than just saying 'no data' — most domains resolve on the first try.
Uses real Common Crawl web graph data, not an estimate based on domain age or traffic
Compares two domains directly, so you see the actual gap, not just an isolated number
Checks live for domains not already indexed, instead of just failing silently
No sign-up, no credit card, no limit on how many comparisons you can run
Clear about its own limits — this is a rank comparison, not a full backlink audit
Domain Authority Checker gives you a single domain's score in isolation — use it alongside Backlink Gap Checker when you want to check more than two competitors at once.
Need more depth? Try DA & PA Analysis →
It's Common Crawl's harmonic centrality score, on a 0-10 scale — a measure of how central a domain is in the web's link graph, computed from real crawl data. It's a genuine authority signal, but a different metric from Moz's Domain Authority or Ahrefs' Domain Rating, so don't expect the numbers to match those tools directly.
This means Common Crawl's dataset hasn't captured that domain yet — common for very new sites or ones with limited external linking. It doesn't necessarily mean the domain has zero authority, just that this specific free data source doesn't have it yet. Trying again in a few weeks often resolves this as crawls are refreshed.
No — this free tool compares overall rank only. A full backlink gap analysis shows the specific domains linking to your competitor but not to you, which needs live, paid backlink data. The full DA & PA Analysis tool on GrowLytics provides that.
Common Crawl releases a new web graph roughly every 1-2 months, though this specific dataset (their 'testing v2' host index) can lag behind their main crawl schedule. Cached results refresh automatically after 35 days.
No limit and no sign-up — compare as many domain pairs as you'd like, for free.