How to Compare Two Websites for SEO
Understanding how your website stacks up against a competitor is one of the fastest ways to find SEO opportunities you're missing. The gaps between you and whoever is outranking you are a roadmap: fix those gaps, and you close the ranking distance. But you can't act on what you can't see.
What Does "Comparing Websites for SEO" Mean?
An SEO comparison (also called a competitor SEO audit or gap analysis) measures two websites against the same set of technical and on-page SEO criteria. The goal is to identify where one site performs better than the other and why.
A meaningful comparison covers:
Side-by-side comparison exposes the exact areas where your competitor has an advantage — and shows you where you're ahead of them.
Why It Matters for SEO
How to Compare Two Websites for SEO
Clarity SEO's free Compare tool runs a side-by-side technical SEO analysis of any two URLs, grading both against the same 29 criteria simultaneously.
→ Compare two websites with Clarity SEO
No login required. Enter your URL and a competitor's URL, and get a detailed comparison report showing where each site wins and where each has gaps.
Run the full Report Card on your own site first for an in-depth individual analysis.
→ Get your free SEO Report Card
How to Do It
Using Clarity SEO's Compare Tool
The comparison shows exactly which technical and on-page factors each site has or is missing — making it immediately clear what to fix first.
Manual Comparison (For Advanced Users)
If you want to go deeper or compare specific elements manually, here's a technical comparison framework:
1. Check title tags and meta descriptions
Open both sites, right-click → View Source, and search for <title> and <meta name="description":
# Check a site's title and meta description via terminal curl -s https://competitor.com | grep -i '<title>\|<meta name="description"'2. Analyse heading structure
In Chrome DevTools (F12 → Elements), search for <h1>, <h2>, <h3> to see how each site structures its content hierarchy.
3. Check structured data
Visit search.google.com/test/rich-results for each URL. See what schema types each site implements and what rich results they're eligible for.
4. Test mobile friendliness
Run both URLs through search.google.com/test/mobile-friendly. Compare the scores and any issues flagged.
5. Measure page speed
Run both URLs through PageSpeed Insights. Compare:
6. Review Open Graph implementation
Use the Clarity OG Preview tool on both URLs to see how each site appears in social shares.
7. Compare robots.txt
Visit yourdomain.com/robots.txt and competitor.com/robots.txt. Note:
8. Check canonical tags
Canonical tags prevent duplicate content issues. Search the page source for <link rel="canonical" to verify both sites use them correctly.
For WordPress
Competitive research workflow:
Tools to install for ongoing competitive monitoring:
For Shopify
- Missing FAQPage schema on product pages
- Missing Product schema with pricing
- Generic meta descriptions (Shopify default: "Product name - Brand")
- Missing OG images (relying on first product photo, which may not be optimised for social)
product.json template, customise meta descriptions per product, and set proper OG images.For Wix / Squarespace / Webflow
Wix vs Squarespace vs Webflow vs competitor:
These platforms have varying levels of SEO control. Use the Clarity Compare tool to see which specific tags and technical factors your site is missing versus a competitor. Then consult the relevant platform guides (OG tags, structured data, mobile) in this guide series for implementation steps specific to your platform.
What to Do With the Results
After running a comparison, prioritise your fixes in this order:
Priority 1 — Foundation (fix immediately):
Priority 2 — On-Page (fix this sprint):
Priority 3 — Performance (ongoing):
Priority 4 — Content strategy (quarterly):
Common Mistakes to Avoid
FAQ
How do I compare two websites for SEO?
Use a tool like Clarity SEO's Compare tool (getclarityseo.com/compare) to run a side-by-side technical SEO audit of any two URLs. It checks both sites against the same criteria — title tags, meta tags, structured data, mobile friendliness, Open Graph, and more — and shows you exactly where each site wins or falls short.
What is an SEO gap analysis?
An SEO gap analysis compares your website against a top-ranking competitor to identify the specific SEO factors where they outperform you. These gaps — missing schema, better meta descriptions, faster load times — represent your highest-priority improvement opportunities.
Can I compare my site to any competitor?
Yes. You can compare your site to any publicly accessible website. Enter both URLs into Clarity SEO's Compare tool and it will analyse both simultaneously. The competitor site doesn't need to be in the same industry — sometimes comparing against any top-ranking site in your niche reveals universal best practices you're missing.
What should I look for when comparing two websites for SEO?
Focus on: title tag and meta description quality, structured data implementation, Open Graph tags, mobile friendliness, page speed (Core Web Vitals), heading structure, image alt text, and canonical tag usage. These are the most actionable technical factors that frequently separate ranking sites from non-ranking ones.
How often should I compare my site to competitors?
Run a competitor comparison at least quarterly, and any time you notice a significant ranking change — up or down. Also run it after making major changes to your site to verify you haven't introduced technical regressions.
Summary
Comparing your website to a competitor is the fastest way to find your next ranking opportunity. The gaps are your roadmap. Start with the free Clarity SEO Compare tool, identify your top priority gaps, and work through them systematically.
Start with your own free SEO Report Card to understand exactly where you stand before comparing.