Want to check your domain authority — or any competitor’s — without paying for Moz, Ahrefs, or Semrush? You can do it completely free in under 5 seconds. This guide explains what domain authority actually means, how to check it for free, what a good score looks like, and exactly how to increase it — all without spending a dollar.
Domain authority (DA) is one of the most commonly checked SEO metrics — and one of the most misunderstood. Before you can use it effectively, you need to know what it actually measures, what it doesn’t, and why it matters for your rankings strategy.
What Is Domain Authority?
Domain Authority (DA) is a score from 0 to 100 that predicts how likely a domain is to rank in search engine results. It was created by Moz and is now widely used across the SEO industry as a quick measure of a website’s overall link-based strength.
DA is calculated primarily based on:
- Number of backlinks — how many links point to the domain
- Quality of backlinks — links from high-authority sites count more
- Diversity of backlinks — links from many different domains are stronger than many from one
- Link relevance — links from topically relevant sites carry more weight
- Domain age and history — older domains with consistent link growth tend to score higher
Important: Domain Authority is NOT a Google metric. Google does not use DA as a ranking factor. However, DA correlates strongly with rankings because it measures backlink quality — and backlinks are a confirmed Google ranking signal. High DA = typically many quality backlinks = Google tends to trust and rank the site.
DA vs DR vs Domain Rating — What’s the Difference?
You’ll encounter several “domain authority” style metrics depending on which tool you use:
- DA (Domain Authority) — Moz’s metric, 0–100 scale
- DR (Domain Rating) — Ahrefs’ equivalent metric, 0–100 scale
- AS (Authority Score) — Semrush’s equivalent, 0–100 scale
- Link Signals Score — Seobility.org’s metric, also 0–100
All measure the same underlying concept — backlink-based domain strength — using slightly different calculation methods. None of them are Google’s metric. For practical SEO decisions, any of them work fine for relative comparisons.
What Is a Good Domain Authority Score?
DA Score Scale — What Each Range Means
The most important point about DA: Your score only matters relative to your competitors. A DA 22 site can easily outrank a DA 45 site with better content and technical SEO in the right niche. Always compare your DA against the sites you’re actually competing against — not against the internet average.
How to Check Domain Authority for Free — Step by Step
Open the Free Link Signals Checker
Go to seobility.org/link-signals-checker/ — no account, no signup, no credit card. The tool loads instantly in any browser.
- Works on desktop and mobile
- No download or extension needed
- No email address required
- Results in under 10 seconds
Enter Any Domain Name
Type or paste the domain you want to check into the input field. You can check your own domain, a competitor’s domain, a potential link partner, or any site you’re curious about.
- Enter just the root domain: example.com
- No need for http://, https://, or www.
- Works for all TLDs: .com .net .org .io .co.uk and more
- Can check subdomains: blog.example.com
Read Your Results
Results appear within seconds. You get 6 key metrics for the domain:
Check Multiple Domains at Once (Bulk)
Need to check DA for many domains — like all your competitors at once, or a list of guest post prospects? Use the free Bulk Domain Checker to analyze 300+ domains simultaneously.
- Paste all domains at once — one per line
- All 6 metrics returned for every domain
- Results in a sortable table — sort by DA descending to find highest authority sites
- Export to CSV for further analysis in Excel or Google Sheets
- 300+ domains supported — completely free, no account needed
What DA Results Look Like — Sample Data
Here’s an example of what you’d see after running a competitor analysis across SEO-related sites:
| Domain | DA Score | Backlinks | Ref. Domains | Traffic/mo | Spam |
|---|---|---|---|---|---|
| moz.com | 91 | 5.1M | 62,000 | 1,800,000 | 1% |
| backlinko.com | 78 | 890K | 28,000 | 680,000 | 2% |
| nichepursuits.com | 63 | 340K | 12,000 | 290,000 | 3% |
| authorityhacker.com | 58 | 180K | 8,400 | 210,000 | 2% |
| seobility.org | 42 | 45K | 3,200 | 85,000 | 4% |
| yourblog.com | 18 | 1,200 | 240 | 4,200 | 6% |
Looking at this sample, if your site has DA 18, you won’t outrank Moz (DA 91) for competitive keywords in the short term. But you absolutely can outrank other DA 18–35 sites with better content — and even occasionally sneak past DA 40–50 sites on low-competition, long-tail keywords with excellent on-page optimization.
Why DA Doesn’t Always Predict Rankings
One of the biggest misconceptions is treating DA as a direct ranking predictor. Here’s why that’s wrong:
Content Quality Can Override DA
A DA 20 site with a comprehensive, well-structured 3,000-word guide on a specific topic will often outrank a DA 50 site with a thin, outdated 400-word page on the same topic. Google cares about content relevance and quality, not just link authority.
Page-Level Authority Matters More Than Domain-Level
DA measures the whole domain. What actually ranks is individual pages — and a specific page on a lower-DA domain with many relevant links pointing directly to it can outrank a higher-DA domain whose pages have no individual link equity. Use page-level link checking alongside domain-level DA checks.
Topical Relevance
A DA 30 site that is entirely focused on your exact niche often outranks a DA 60 general site that covers your topic occasionally. Google values topical authority — deep coverage of a specific subject — as much as raw link count.
Technical SEO
A faster, technically cleaner site can outrank a higher-DA competitor with poor Core Web Vitals, crawl errors, and bad mobile experience. Run a free SEO audit alongside your DA check to ensure technical issues aren’t limiting your rankings regardless of your authority score.
How to Increase Your Domain Authority
DA is a lagging indicator — it reflects link work you’ve already done, not what you’re doing now. Expect 3–6 months before significant DA increases appear after a link building push. Here’s what moves the number:
1. Earn High-Quality Backlinks
The most direct way to increase DA is earning links from high-authority, relevant sites. One link from a DA 70 site moves your score more than 100 links from DA 5 sites. Focus on quality over quantity. Effective methods include:
- Guest posting — write valuable content for relevant publications in your niche
- Digital PR — create newsworthy content that journalists want to cite
- Resource link building — create tools, studies, or guides worth linking to
- HARO / journalist outreach — provide expert quotes for articles in your niche
- Broken link building — find broken links on relevant sites and offer your content as a replacement
2. Fix and Reclaim Lost Links
Before building new links, protect and recover existing link equity. Use the Broken Link Checker to find links pointing to 404 pages on your site — set up 301 redirects to recover that lost equity. Check for unlinked brand mentions using Google Search and reach out to ask for a link to be added.
3. Improve Your Internal Link Structure
Internal links distribute PageRank across your site. A page with strong external links should link internally to your most important pages to pass authority through the site. Use Seobility’s internal linking analyzer to identify orphan pages receiving no internal link equity.
4. Remove Toxic Backlinks
Backlinks from spam, low-quality, or irrelevant sites can drag your DA down and potentially trigger Google penalties. Check your spam score with the Link Signals Checker — if it’s over 20%, audit your backlink profile and disavow toxic links via Google Search Console’s disavow tool.
5. Build Consistent Content That Attracts Links Naturally
The sites with the highest DA scores — Backlinko, NeilPatel, Moz — got there primarily by consistently publishing content people want to link to: original research, comprehensive guides, free tools, and unique data. Linkable content is the highest-ROI long-term DA strategy.
- Track DA monthly: Use the Bulk Domain Checker to check your DA alongside your top 5 competitors every month. This shows whether the gap is closing or widening over time.
- Focus on referring domains, not backlinks: 100 links from 100 different domains is far stronger than 1,000 links from one domain. DA rewards diversity.
- New domains start low — that’s normal: A brand new domain will have DA 1–5 regardless of content quality. DA takes time and links to build. Don’t panic about a low initial score.
- DA fluctuates — don’t obsess: Moz recalculates DA regularly and scores can shift by 2–5 points between updates without any action on your part. Look at trends over 3–6 months, not weekly snapshots.
- Competitor gap analysis: If your DA is 25 and competitors ranking on page 1 average DA 30–40, you’re in striking distance. If they average DA 60+, content quality and technical SEO need to compensate for the authority gap.
Best Free Domain Authority Checkers Compared
| Tool | Seobility.org | Moz Free | Ahrefs Free | Small SEO Tools |
|---|---|---|---|---|
| Signup Required | ❌ None | ✅ Required | ✅ Required | ❌ None |
| DA / Authority Score | ✅ | ✅ (DA) | ✅ (DR) | Limited |
| Backlink Count | ✅ | Limited free | Top 100 only | Estimated |
| Referring Domains | ✅ | Limited | Limited free | ❌ |
| Traffic Estimate | ✅ | ❌ | ❌ (free tier) | ❌ |
| Spam Score | ✅ | ✅ | ❌ | ❌ |
| Bulk Check (300+ domains) | ✅ Free | ❌ Paid only | ❌ Paid only | Very limited |
| Export to CSV | ✅ Free | ❌ Paid only | ❌ Paid only | ❌ |
💪 Check Your Domain Authority Right Now — Free
No signup. No account. No credit card. Get your DA score, backlinks, referring domains, traffic estimate, and spam score in under 10 seconds.