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Compare two websites side by side
Enter two URLs above to run a full SEO analysis on both and see how they stack up across performance, security, accessibility, AEO, and more.
This free comparison tool runs two websites through the exact same checks at the same time and shows you, category by category, which one wins. Enter your URL as the first site and a competitor as the second, and you get a side-by-side scorecard covering overall SEO health, performance and Core Web Vitals, accessibility, security headers, technical signals such as SSL and meta tags, plus AI-search readiness across AEO, GEO, LLMO, SMO and more. Each category shows a number out of 100 for both sites, the point gap between them, and a crown marking the winner, so you never have to guess where you stand.
Most people use it for competitor SEO comparison: you want to know why a rival outranks you on Google, so you line up your homepage against theirs and read the gaps. Others use it as a before-and-after check after a redesign, comparing the old URL to the new one, or staging to production, to prove the relaunch made things better and not worse. Either way, the value is the same. Instead of one site's report in a vacuum, you get a direct head-to-head that tells you exactly which fixes will close the distance fastest.
Because both sites run through an identical pipeline, the comparison is fair. There is no signup and no cost, and you can compare any two public URLs in a single click.
Search rankings are relative, not absolute. Google does not reward a page for being good in isolation; it ranks it against every other page competing for the same query. That means a site can have a clean technical setup and still lose, simply because a competitor does the same things slightly better. A side-by-side comparison turns that invisible race into something you can see and measure.
Looking at your own audit alone tells you what is broken, but not what is enough. You might have a performance score of 78 and assume it is fine, until you put it next to a competitor scoring 94 and realise speed is exactly why they win the click. Comparison reframes every metric as a gap to close rather than a box to tick, which is far more useful when you have limited time and need to decide what to fix first.
It also keeps your strategy honest. Teams often pour effort into areas where they are already ahead because those wins feel good, while ignoring the one category where a rival is quietly dominating. Seeing both columns next to each other exposes that blind spot and points your roadmap at the work that actually moves rankings.
Start with titles and meta descriptions. The tool flags whether each site has a meta title and description present, but the deeper question is quality: is the competitor using the target keyword earlier, writing a more compelling promise, and staying within the length Google shows? Use the DarnItSEO SERP Preview tool to see how each title and description renders in the results and where one site reads more clickable than the other.
Next look at headings and content depth. A page that wins usually has a clearer heading structure and answers more of the searcher's follow-up questions. The comparison surfaces the issue counts and page-level signals for each site so you can spot when a competitor simply covers the topic more thoroughly than you do.
Then compare schema and structured data. Rich results, FAQ markup and product data can hand a competitor extra space and eye-catching features in the search listing even at the same rank. The DarnItSEO Schema tool lets you inspect exactly which structured data each site ships so you can match or beat it.
Finally weigh speed, security and links. Performance and Core Web Vitals decide how fast each page feels, the technical panel compares SSL validity, certificate expiry and security-header scores, and the overall SEO score folds in on-page and link-related signals. Together these tell you whether you are losing on substance, speed, trust, or all three.
The big hero panel at the top shows each site's overall score out of 100 and highlights the winner. Treat this as the headline, not the whole story; two sites can have a similar overall number while differing wildly underneath.
The Category Wins summary counts how many of the individual categories each site takes, which is the quickest way to see the shape of the matchup. A 6-to-2 split tells you the competitor is broadly stronger, while a tight split means you are losing on a small number of specific things you can target precisely.
The Score Breakdown lists every category side by side with the exact point gap. A green number means your site leads that category; a red number means the competitor does. Sort your attention by the largest red gaps first, because those are the categories costing you the most relative ground.
The Technical and Issues panels add detail the scores alone hide. The Issues comparison counts critical, warning and info problems on each site, and fewer is better, so a site that scores well overall but carries several critical issues is more fragile than it looks.
Once you can see where a competitor is ahead, turn the biggest gaps into a short fix list ordered by impact and effort. Critical technical problems and large performance gaps usually come first, because they are both high impact and often quick to fix, while a small content-depth gap can wait.
For a much deeper view of any single site, run the full DarnItSEO Audit. The comparison tool is built for fast head-to-head benchmarking, but a single-site audit returns specific, line-by-line fix instructions for every issue rather than just a category score, which is what you want once you know which area to attack.
If your goal is AI search visibility, pay attention to the AEO, GEO and LLMO columns, then use the DarnItSEO AI Readiness tool to understand why one site is more likely to be cited by AI Overviews, ChatGPT and Perplexity. As these surfaces send more traffic, a gap here matters as much as a classic ranking gap.
Re-run the comparison after you ship your changes. Comparing your updated URL against the same competitor, or against your own previous version, confirms the gaps actually narrowed and turns SEO from a one-off cleanup into a measurable, repeatable habit.
The first mistake is comparing the wrong pages. A homepage and a deep product page serve different jobs, so lining your homepage up against a competitor's blog post tells you very little. For a fair read, compare like with like: homepage against homepage, or the two specific pages that actually compete for the same query you care about. The closer the two URLs are in purpose, the more meaningful every category gap becomes.
The second mistake is treating the overall score as the whole answer. Two sites can land within a point of each other overall while one quietly wins every category that matters for your goal and loses only on things you do not care about. Always open the Score Breakdown and weigh the categories by how much they affect your specific situation, rather than letting a single headline number settle the question.
The third mistake is reacting to a single snapshot. Scores can shift with a slow server response, a temporary outage, or a recent change one site has made and the other has not yet matched. If a result surprises you, run the comparison again a little later before drawing conclusions, and remember that a competitor who is ahead today may simply be a few fixes you have not made yet rather than a permanent gap.
Add your site as URL A and a competitor as URL B (or before/after URLs).
Both sites are analyzed across every category at the same time using identical checks.
Review the side-by-side scorecard, then target your largest red gaps first.
Overall SEO health, performance and Core Web Vitals, accessibility, security headers, technical signals like SSL and meta tags, and AI-search readiness across AEO, GEO, LLMO and more.
Yes, that is the most common use. Enter your URL as the first site and theirs as the second to see exactly where they are ahead and by how many points.
Yes. Compare your old and new URLs, or staging versus production, to confirm the relaunch improved your scores and did not quietly regress.
Yes. Performance signals, including Core Web Vitals, are part of the comparison for both sites.
Each category is scored independently, so one site can win on speed while the other wins on content or schema. The Category Wins summary tallies the overall split for you.
Start with the largest red point gaps, especially any critical issues and big performance differences, since those usually cost you the most relative ranking ground for the least effort.
The tool compares two URLs at a time for a clean head-to-head. To benchmark several competitors, run the comparison repeatedly against your own URL.
Comparison is built for fast benchmarking and tells you who wins each category. For line-by-line fix instructions on one site, run the full DarnItSEO Audit instead.
Yes, free and no signup. For a deep single-site audit with fix instructions, schema inspection, SERP previews and AI-readiness analysis, explore the other DarnItSEO tools.