Can you see the real traffic of any domain?
Not exactly. Tools like Semrush, Ahrefs or SimilarWeb estimate visits based on clickstream panels, provider data and statistical models. According to the documentation of these platforms, their figures are approximations: they get the order of magnitude right for large sites, but they fail on small domains (fewer than 10,000 visits/month), where the margin of error is huge. If you need the exact figure, only the owner can provide it with an analytics tool installed on the site.
What tool do I use if I don’t want to pay?
For a first estimate, SimilarWeb in its free version gives an idea of the volume and the source of traffic, although with highly aggregated data. Another free option is to check the domain in Google Trends to see the relative trend (not absolute figures). For specific organic traffic, Search Console only works if you are a verified owner of the domain; it is no use for spying on competitors.
How do I distinguish organic traffic from direct or paid traffic?
Tools usually break down channels: organic search, direct, referrals, social and paid. That breakdown is estimated. A common mistake I see in audits: confusing direct traffic with real brand visits, when in fact it includes traffic without a referrer (links from apps, emails, PDFs). If a competitor shows 60% direct, they probably have a significant share of unattributed traffic, not a very strong brand.
Is estimated traffic useful for valuing a domain in a purchase?
It serves as a guide, never as proof. Before buying a domain, ask for read access to its Google Analytics or Search Console. If the seller doesn’t provide it, be suspicious. I have seen domains with high authority metrics and estimated traffic of 50,000 visits that, when checking the real history, had traffic spikes from bots or from a one-off campaign that had already ended.
Why do the figures vary so much between tools?
Each provider uses different sources: browser extensions, ISP data, search engine clickstream panels. That’s why Ahrefs and Semrush can differ by 30-40% on the same domain. The practical recommendation is to use a single tool consistently to compare domains with each other, instead of mixing sources.
What limits are there to checking the traffic of someone else’s domain?
You can’t know conversions, real bounce rate or session duration. Nor the traffic of subdomains or internal paths reliably. And in sectors with a lot of app or login traffic, the web estimate falls short because a large part of the usage happens outside the browser. Recognizing these limitations prevents business decisions based on data that are only a shadow of the real traffic.