Rankfill

Compare Competitor Website Traffic to Find Your Gaps

You check your analytics and the numbers are flat. Then you Google one of your main keywords and find a competitor sitting in position two with a blog post they published eight months ago. You click through. It's not better than what you have — it might actually be worse. But it's ranking and yours isn't. You start wondering what they're doing that you aren't.

That frustration is the right starting point. Comparing competitor traffic isn't about obsessing over their numbers. It's about finding the specific gaps — pages they have that you don't, keywords they rank for that you've never touched — and using that to build something.

Here's how to actually do it.

What You're Looking For When You Compare Traffic

The goal isn't to know their total traffic number. That figure by itself tells you nothing actionable. What matters is:

This distinction matters because most people pull up a competitor's estimated traffic number, feel bad or feel good about it, and close the tab. That's not analysis. Analysis is the list of keyword gaps you can actually close.

The Tools That Show You Competitor Traffic

No tool gives you exact traffic data for a competitor's site — only their own Google Analytics does that. What these tools give you are estimates built from clickstream data and keyword ranking models. They're close enough to be useful.

Semrush

Go to Semrush's Organic Research tool, enter a competitor's domain, and you'll see their estimated monthly organic traffic, their top keywords, and their top pages by traffic. The most useful report here is the Keyword Gap tool — enter your domain and up to four competitors, filter for keywords where competitors rank but you don't, and you get a clean list of what you're missing.

Ahrefs

Site Explorer works the same way. Enter a competitor's domain, look at their organic keywords, then use Content Gap (under Organic Search) to run the same exercise. Ahrefs tends to have a large keyword index and the traffic estimates are directionally accurate.

Similarweb

Similarweb uses panel data and estimates total traffic including direct, paid, social, and organic. It's less useful for keyword-level analysis but better for understanding traffic mix and traffic trends over time. If you want to know whether a competitor is growing or declining overall, Similarweb shows that more clearly than keyword tools do.

Google Search Console (your own data)

This is often overlooked in a competitor analysis conversation, but it matters. Search Console shows you exactly which queries your site is already appearing for and which positions you're in. When you run a gap analysis against competitors, your Search Console data tells you which gaps are genuinely new territory versus which ones you're already close on.

How to Run the Comparison Step by Step

Step 1: Identify your real competitors

These aren't necessarily the businesses you sell against. They're the sites ranking for the keywords your customers search. Search five to ten of your target keywords and note who appears consistently. Those are the domains you analyze.

Step 2: Pull their top pages and top keywords

In Ahrefs or Semrush, look at the top 20 pages driving the most organic traffic for each competitor. Note the topics — not just the exact keywords, but the underlying subject areas. You're looking for patterns. Are they getting traffic from comparison pages? Tutorial content? Location pages? Product category pages?

Step 3: Run the keyword gap report

Use Semrush's Keyword Gap or Ahrefs' Content Gap. Set the filter so you're only looking at keywords where they rank in the top 20 and you don't rank at all. Export the list. This is your gap list.

Step 4: Filter by relevance and volume

Not every gap is worth closing. Go through the list and remove anything that isn't relevant to your actual business. Then sort by search volume and look at keyword difficulty. Your best opportunities are usually mid-volume keywords (500–5,000 monthly searches) with difficulty scores that your domain authority can actually compete at.

Step 5: Group by topic

Rarely is a single keyword an opportunity by itself. Keywords cluster — "project management software comparison," "best project management tools," and "compare project management apps" are all the same underlying topic. Group your gaps by topic, not by individual keyword. Each topic cluster is one piece of content.

For a deeper breakdown of how to structure this kind of competitive keyword research, the guide on how to analyze competitors and steal their keywords is worth reading before you start building your content plan.

What to Do With the Gaps You Find

Finding gaps is only useful if you act on them. Here's a simple prioritization framework:

High priority: Gaps where competitors have a page and you have nothing. The competitor is already capturing traffic — you know demand exists. You just need to enter that conversation.

Medium priority: Gaps where you have a page but it's not ranking. This might be a quality problem, an internal linking problem, or a topic coverage problem. These are worth auditing before creating new content.

Low priority (for now): High-volume, high-difficulty gaps where competitors with significantly more authority are dominating. These are worth noting but they're not where you start.

The competition analysis guide for closing gaps fast covers how to triage this list and sequence what you build first.

Where People Go Wrong

They only look at one competitor. One competitor might have an unusual traffic profile — a single viral post, a lot of branded searches, a niche that barely overlaps with yours. Look at three to five competitors and find what they have in common.

They stop at traffic volume. A competitor page getting 10,000 visits per month from a keyword you can't realistically rank for isn't an opportunity. A competitor page getting 400 visits from a mid-difficulty keyword in your exact topic area absolutely is.

They never check whether the gap actually converts. Traffic is not the goal. If you run an e-commerce store and a competitor is getting organic traffic from informational blog posts that never lead to purchases, those gaps may not be worth your effort. Map the gap to your funnel.

They don't look at page structure. When a competitor ranks well for a topic, study the page that's doing it. How long is it? What does it cover that similar pages don't? The guide to analyzing competitor websites for SEO gaps walks through the on-page signals worth examining.

Scaling the Analysis

If you're doing this manually for one or two competitors, the process above is enough. If you have a larger site and want to run this across your full competitive landscape — multiple competitors, hundreds of keyword gaps, organized into a content plan — doing it by hand gets unwieldy fast.

Some people use crawl tools and custom exports to automate the gap aggregation; Screaming Frog alternatives for content gap analysis covers which tools handle this well. Others use a service like Rankfill, which maps your competitors automatically, identifies every keyword gap, and delivers a prioritized content plan with estimated traffic potential.

Either way, the output you're looking for is the same: a list of specific topics your competitors own that you don't yet, ranked by opportunity.

FAQ

How accurate are competitor traffic estimates? Directionally accurate, not precisely accurate. Tools like Semrush and Ahrefs are built from large keyword ranking datasets and clickstream panels. The actual number could be 20–40% off in either direction, but the relative picture — this competitor gets more traffic than that one, from these topics — is reliable enough to act on.

What if my competitors aren't ranking for much either? Then the opportunity is to be the first mover. Use keyword research to find what your customers are searching that nobody in your space is targeting well. Your competitors' gaps are also your gaps — and your opportunity.

How often should I run this comparison? Quarterly is enough for most sites. If you're in a fast-moving space or actively publishing content, monthly makes sense. You're looking for shifts — new competitors entering, existing competitors gaining on new topics, gaps you've closed (or ones that have opened).

Do I need a paid tool to do this? For a basic gap analysis, you can get started with Semrush's free tier or Ahrefs' limited free tools. For a full gap report across multiple competitors with keyword difficulty and volume data, you'll need a paid plan. The cost is usually worth it if you're going to act on what you find.

What's the fastest way to act on the gaps I find? Pick three to five high-priority topic gaps, create one piece of content per topic, and get them indexed. Watch which ones move. That feedback loop — create, index, measure — teaches you more about your specific site than any analysis can.