A bulk DA checker is a tool that returns Moz’s Domain Authority score for many domains in one run instead of one at a time. It saves time when you are screening a list of sites, but the number it returns is only a rough comparison score, not a verdict on quality.
What Domain Authority actually is
Domain Authority (DA) is a score from 1 to 100 created by Moz. It is meant to estimate how likely a website is to rank in search results compared with other sites, based mainly on its link profile. Moz explains the metric on its own page, What is Domain Authority, and that page is the one to trust over any third-party summary.
Two points matter before you check anything. First, DA is a Moz metric, not a Google one. Google does not use it as a ranking factor, and Google’s own guidance on link quality never mentions it. Second, the scale is comparative: a score only means something next to other scores calculated the same way.
What “bulk” checking does
Checking one domain means typing it into a tool and reading the result. Bulk checking takes a pasted list or uploaded file of domains and returns a table with one score per row. Typical uses:
- Screening a list of possible guest post or outreach targets before you write to anyone.
- Comparing your site against a handful of competitors.
- Reviewing the sites that already link to you.
- Cleaning a long prospect spreadsheet so you only read the sites worth a manual look.
Moz offers a free Domain Analysis tool and paid products with larger limits, and other vendors publish their own bulk checkers. We have not tested any of them for this article, so check the limits, data source and pricing on the provider’s own page before relying on one.
Alternatives to Moz DA
Several SEO suites publish a similar 0 to 100 style score, each built from the vendor’s own link index. They do not agree with each other.
| Metric | Vendor | Notes |
|---|---|---|
| Domain Authority (DA) | Moz | Based on Moz’s link index; see Moz’s explainer. |
| Domain Rating (DR) | Ahrefs | Describes the strength of a site’s backlink profile; see Ahrefs’ Domain Rating article. |
| Authority Score (AS) | Semrush | Semrush’s own compound score; see its knowledge base page. |
Because every vendor crawls a different slice of the web, the same domain can show quite different numbers across tools. Compare sites using one metric from one provider, never a mix.
Limits and accuracy
- It is a prediction, not a measurement. DA models likelihood; it does not report real traffic or real rankings.
- Scores move. Moz recalculates as its index updates, so a number you saved last month may be out of date.
- It can be inflated. A site can accumulate links in ways that raise a score without making the site useful to readers.
- It ignores topic. A high-score site in an unrelated subject can be worth less to you than a modest site your audience reads.
- Subdomains and free hosts. Domains on shared platforms can inherit a score that does not describe the individual page or blog.
How to use bulk results responsibly
- Clean the list first. Remove duplicates and enter bare domains, so you do not pay for or wait on repeat rows.
- Run one provider. Keep a single metric per column and note the date of the check.
- Use the score to sort, not to decide. Treat it as a first filter that tells you which sites to open by hand.
- Visit every finalist. Look for real readers, recent posts, a clear editorial voice, an about page and a way to contact the team.
- Cross-check traffic trends. A sudden drop in a site’s visibility is a warning sign that no authority score will show.
- Keep personal data out. Domain lists are not sensitive, but do not paste logins or private spreadsheets into unknown web forms.
A note on link building
People most often run bulk checks while hunting for places to get links. Google’s spam policies say that buying or selling links for ranking purposes counts as link spam, and its guidance on qualifying outbound links explains when to use rel=”sponsored” or rel=”nofollow”. A high DA does not make a paid, unlabelled link acceptable. For the editorial route, see our guest posting guide, and for AI-assisted research tools see best AI SEO tools.
What we checked
As of 10 Nov 2026 we confirmed that Moz’s explainer page, Ahrefs’ Domain Rating article, Semrush’s Authority Score page and Google’s spam policies page were reachable and describe the concepts as summarised above. We did not test, rank or endorse any specific bulk checker, and we make no claims about tool accuracy.
Frequently asked questions
Is a bulk DA checker free?
Some providers offer limited free checks and charge for larger volumes, but terms change. Read the provider’s current page for daily limits and any account requirement.
Does a higher DA improve my Google rankings?
No. DA is Moz’s own score. Raising it is not a Google ranking goal, and Google does not use it as a ranking signal.
What is a good DA score?
There is no universal threshold. Compare against sites in your own niche, and judge relevance and audience as well as the number.
Why do two tools show different scores for the same site?
Each vendor builds its score from its own crawl and its own formula, so the numbers are not interchangeable.
How often should I re-check a list?
Before you act on it. A list that is a few months old should be rechecked, since link indexes and scores update.
