SimilarWeb Insights

Give it a list of domains, get back their traffic, audience and competitor data from SimilarWeb.

What it does

• Returns website traffic stats and audience insights from SimilarWeb — total visits, engagement rates, top traffic sources and competitor performance.
• domains is an array, not a single string. Pass ["stripe.com", "google.com"] even when you only want one domain.
• This is the audience and competitor member of the traffic family. Choose it when you care where the traffic comes from, not just how much there is.

Two other tools answer traffic questions. find_company_website_traffic is the cheapest at 1 credit and returns a traffic number from a provider-agnostic waterfall. semrush_insights costs the same 2 credits as this tool but answers the SEO question — organic keywords and backlinks, one domain per call.

Use cases

• See where an account’s traffic comes from. Paid-heavy and organic-heavy companies have different budgets and different problems.
• Run a competitive comparison in one call. The array input puts a prospect and their rivals side by side.
• Qualify on engagement, not just volume. Visit duration and bounce separate a real audience from a spike.
• Build a market map. Competitor performance data shows who actually leads the category you are selling into.

How to use it

Get SimilarWeb insights for the domains ["acme.com"].

Get SimilarWeb insights for ["acme.com", "competitor-a.com", "competitor-b.com"].
Compare total visits and engagement, and tell me which one is growing.

For acme.com, break down top traffic sources. Are they paid-heavy or
organic-heavy? Write a one-line opener based on the answer.

Example prompts

Best prompting practices

• Always pass an array. A bare string is the most common failure on this tool. ["acme.com"], not "acme.com".
• Batch the comparison set into one call. Putting the account and its competitors in the same domains array is what makes the competitor read useful — and it is one call, not four.
• Say “audience” or “traffic sources” or “competitors”. That phrasing routes your client here rather than to the SEO tool.
• Screen with the cheap tool first. find_company_website_traffic at 1 credit is enough to disqualify a domain before you spend 2 here.
• Ask for the comparison, not the table. “Which of these three is growing fastest” is the output you can use in an email.
• Name the metrics when you want them side by side. Total visits, engagement rate, traffic-source split — same fields for every domain in the array, or the comparison is not a comparison.
• Normalise the domains before the call. Root domain, lowercase, no www. and no protocol. A malformed entry in the array comes back thin and reads like a low-traffic site.
• Say what a thin result means. “If a domain is below the reporting threshold, mark it no data — do not estimate.” An invented visit count is worse than a blank.

Output

{
  "domains": [
    {
      "domain": "acme.com",
      "total_visits": 184000,
      "top_traffic_sources": ["direct", "organic search", "referral"]
    }
  ]
}

Credits and limits

2 credits per call. Run check_credits (free) before a large batch.

Parameters

Related tools

Next steps

• All MCP tools — the full catalogue with credit costs
• TAM Sourcing — workflows that chain this tool into account qualification

Keep learning

Two courses take these tools past the reference page — clustered by GTM job, then chained into workflows.