Similarweb Data Methodology FAQs

How long does it take Similarweb to show data for a new site?

Our algorithm requires that a site has enough traffic for us to properly create estimations for it. The amount of time this takes depends on the site itself (specifically how much traffic it receives, and how diverse that traffic is). Assuming the site meets these requirements, we will be able to show data not long after.

What time zone is Similarweb data based on?

All of our data (including API) is based on the time zone EST without daylight savings.

Note: Daily visits reset at midnight EST, regardless of what time it is in a different timezone. For example, if someone in China is browsing the internet at 6am on December 13th, then this would be 5pm EST on December 12th. On the Similarweb platform, this visit would be attributed to December 12th.

How do VPNs affect which country we attribute a website visit to?

We attribute a visit to the country from which we detected their first visit of the day. For example, if someone from country A logs onto their computer and visits a website, and then 5 minutes later connects to their VPN (country B) and visits more websites throughout the day, all website visits for the entire day will be attributed to country A.

How does Similarweb report on website redirects?

Generally, permanent redirects will count as visits to the site where the user ends up. In cases where we track the redirect, only the final site will be attributed a visit. When we don't see the redirect (because of how it is set up by site architects, i.e., client-side redirects, server-side redirects, changes between HTTP(S) protocols, etc.), both the redirecting and final site will get a visit each.

Does Similarweb collect personally identifiable information (PII) or IP data?

We do not need PII or personal data to deliver any of the data and insights made available on our platform or through our API. In addition, we do not collect IP data and no metric in our platform, including Unique Visits, requires or uses IP data.

Demographic data is based on a learning algorithm that identifies any website’s demographic profile. For more information, read our blog post How to Use Website Demographics Effectively in Your Audience Analysis.

Why do some metrics have decimal places in Excel and the API?

Within the Similarweb platform, our data is based on estimations and algorithms; therefore, the numbers are rounded to the nearest whole number. However, Similarweb shows fractions of numbers instead of rounding to the nearest whole number in the API and when downloading data to Excel.

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