Backlinks are the backbone of SEO. Every link from another website to yours is a vote of confidence that tells Google: “This content is trustworthy and worth ranking.”
To build backlinks effectively, you need to understand your current link profile and your competitors’. Here are the best tools for the job.
Best Backlink Checkers Compared
| Tool | Best For | Free Tier | Paid Price | Index Size |
|---|---|---|---|---|
| Ahrefs | Comprehensive analysis | Yes (own site only) | $99/month | 35T+ links |
| Semrush | All-in-one SEO suite | Limited | $129.95/month | 43T+ links |
| Moz Link Explorer | Beginner-friendly | 10 queries/month | $99/month | 40T+ links |
| Ubersuggest | Budget-friendly | 3 searches/day | $29/month | Large |
| Majestic | Pure link analysis | Limited | $49.99/month | Largest historical index |
| SE Ranking | Value for money | 14-day trial | $44/month | Large |
Detailed Reviews
Ahrefs — Best Overall Backlink Checker
Ahrefs crawls the web continuously and maintains one of the largest backlink databases. Its Site Explorer tool gives you everything: backlinks, referring domains, anchor text distribution, link growth over time, and referring page authority.
Key backlink features:
- Backlink profile: Every link pointing to a URL or domain
- Referring domains: Unique sites linking to you (with DR scores)
- Anchor text analysis: What text other sites use when linking to you
- New & lost links: Daily updates on links gained and lost
- Link intersect: Find sites that link to competitors but not to you
- Broken backlinks: Links pointing to your 404 pages (redirect them!)
What makes it best:
- Freshest index — new links appear within hours
- Most accurate DR (Domain Rating) metric in the industry
- Best “Link Intersect” tool for competitor gap analysis
- Free Webmaster Tools for analyzing your own site
Pricing: $99/month (Lite) — includes 500 backlink reports/month
Semrush — Best All-in-One Option
If you need backlink analysis PLUS keyword research, site audits, content tools, and rank tracking, Semrush bundles everything into one subscription. Its Backlink Analytics and Backlink Audit tools are strong.
Key backlink features:
- Backlink Analytics: Full link profile with authority scores
- Backlink Audit: Automated toxic link detection
- Backlink Gap: Compare your link profile against up to 5 competitors
- Link Building Tool: Manage outreach campaigns inside Semrush
- Brand Monitoring: Discover unlinked brand mentions for easy link wins
What makes it different:
- Toxic link score automatically identifies harmful backlinks
- Built-in outreach workflow (find prospects → draft emails → track responses)
- Best for agencies managing multiple client backlink profiles
Pricing: $129.95/month (Pro) — includes backlinks + full SEO suite
Moz Link Explorer — Best for Beginners
Moz’s Link Explorer is the most intuitive backlink tool for SEO newcomers. The interface is clean, the metrics are well-explained, and the free tier is genuinely useful.
Key backlink features:
- Domain Authority (DA): Moz’s widely-used authority metric
- Linking Domains: Shows all unique sites linking to you
- Spam Score: Identifies potentially spammy links
- Link tracking lists: Save and monitor specific link-building targets
- Top pages: Which of your pages have the most backlinks
What makes it beginner-friendly:
- Clear explanations of every metric
- Spam Score makes toxic link identification simple
- DA is widely understood and frequently cited (useful for comparison)
- 10 free queries/month — enough for basic monitoring
Pricing: $99/month (Standard) or free for 10 queries/month
Ubersuggest — Best Budget Option
Neil Patel’s Ubersuggest offers backlink data at a fraction of the price of premium tools. The data isn’t as comprehensive as Ahrefs, but for individual creators and small blogs, it’s often sufficient.
Key backlink features:
- Backlink count and referring domain list
- Domain Score (similar to DR/DA)
- New and lost backlinks tracking
- Competitor backlink analysis
- Top pages by backlinks
Pricing: $29/month or $290/year (lifetime deal occasionally available at $120)
Majestic — Best for Link Analysis Specialists
Majestic has the largest historical backlink index — useful for analyzing older link profiles. Its unique metrics (Trust Flow and Citation Flow) provide a different perspective from DA/DR.
Key features:
- Trust Flow: Quality of backlinks (trusted vs. spammy)
- Citation Flow: Quantity/influence of backlinks
- Historic Index: Link data going back years
- Topical Trust Flow: Shows which topics your site has authority in
- Clique Hunter: Find sites that link to multiple competitors
Best for: Advanced SEOs who want deep link analysis beyond standard metrics.
How to Use Backlink Data
Competitor Analysis Workflow
The fastest way to find link-building opportunities:
- List your top 5 competitors (sites ranking for your target keywords)
- Enter each into your backlink tool
- Export their referring domains
- Find overlap — sites linking to 2+ competitors are likely to link to quality content in your niche
- Analyze the linking pages — what content earned these links?
- Create better content and pitch these sites
The Link Intersect Method
Use Ahrefs’ “Link Intersect” or Semrush’s “Backlink Gap”:
| Input | What It Shows |
|---|---|
| Competitor A + B + C | Sites linking to all three competitors |
| Your site vs. Competitor A | Sites linking to them but not you |
Sites linking to your competitors but not you are the highest-probability outreach targets — they already link to content in your niche.
Monitoring Your Own Backlinks
Set up monthly monitoring for:
| Alert | Why | Action |
|---|---|---|
| New backlinks gained | Track what content earns links | Double down on that content type |
| Backlinks lost | Identify broken or removed links | Reach out to restore, or create redirect |
| Toxic/spammy links | Protect your rankings | Disavow in Google Search Console |
| Competitor new links | Spot their strategies | Replicate effective link-building tactics |
Link Quality Evaluation
Not all backlinks are equal. Here’s how to evaluate link quality:
| Signal | High Quality | Low Quality |
|---|---|---|
| Domain authority | DR/DA 40+ | DR/DA under 10 |
| Relevance | Same niche/topic as your site | Unrelated industry |
| Traffic | The linking site gets real organic traffic | No traffic (may be a spam site) |
| Link placement | In the body content (editorial link) | Footer, sidebar, or comment |
| Anchor text | Natural, descriptive text | Exact-match keyword or generic (“click here”) |
| Follow vs. nofollow | Dofollow (passes authority) | Nofollow (less SEO value, still has some benefit) |
What to Read Next
- How to Do Keyword Research — find the keywords to target
- How to Optimize Blog Posts for SEO — create content that earns backlinks
- Best AI SEO Tools — automate parts of your SEO workflow
