Similarweb

Similarweb estimates the traffic of any website: monthly visits, which countries they come from, and how they arrive, whether through Google, ads, social, email or other sites. Put your site next to a few competitors and you can see who is growing, which channels work for them and which sites send them visitors. Paid plans add keyword and ad research, market-wide trends, and newer AI features: agents that write market and SEO reports, and tracking of traffic from ChatGPT and other AI assistants.

Pick it when the question is about a market or a competitor's whole business rather than SEO alone: sizing up a niche before you launch, checking a rival's channel mix, or benchmarking your share of traffic. Semrush and Ahrefs are better if SEO is the main job, and they include traffic estimates of their own.

The numbers are estimates, and for small sites (under roughly 50,000 visits a month) they can be well off or missing. Pricing isn't published for the bigger packages, the higher tiers need a yearly contract, and it gets expensive fast for a small business.

• Marketers
• Founders
• Market researchers
• Investors
• E-commerce brands

Marketers, founders and analysts who want to size up competitors and markets from the outside.

• Website traffic

  Estimated visits, engagement and audience countries for any site, compared side by side.

• Traffic channels

  How much of a site's traffic comes from search, ads, social, email, referrals and direct visits.

• Referral sources

  The sites, publications and partners that send traffic to a competitor.

• Keyword and ad research

  Search keywords and paid ads that drive a site's traffic, on paid packages.

• AI traffic and visibility

  Traffic from ChatGPT and other AI assistants, plus how often AI answers mention a brand.

• AI agents and AI Studio

  Ask questions in plain English and get market, SEO and demand reports written for you.

• Free

  Free

  Quick checks on a big competitor.

  • Top-level traffic estimates
  • Main countries and channels
  • Limited history and results
• Our pick

  Starter

  About $125/mo billed yearly, $149 monthly

  A founder or marketer tracking a handful of competitors.

  • Website traffic and channel analysis
  • 3 months of history
  • Limited results per report

• Business packages

  Custom, yearly contract

  Teams that need SEO, ads or AI search data at depth.

  • Up to 37 months of history
  • 100+ countries
  • Competitive, SEO, ads and AI search suites
  • API and MCP data feeds

Prices in USD unless noted, checked 22 October 2026. Vendors change plans often, so confirm on their site before you buy.

Ways Similarweb can slot into your week.

1. 1

   Size up a competitor

   Compare your traffic with three rivals and see which channels each one leans on.

2. 2

   Check a market before you launch

   Look at traffic across the leading sites in a niche to see how big the demand is and who owns it.

3. 3

   Find partnership and PR targets

   List the sites that send traffic to competitors and approach the ones that don't link to you yet.

4. 4

   Track traffic from AI assistants

   See how much traffic you and competitors get from ChatGPT and similar tools.

Similarweb gives the outside view of competitors; Google Analytics and Search Console give the real numbers for your own site. Bigger packages include an API and MCP connection so Claude can pull its data.

The closest alternatives to Similarweb in the library, best rated first.

• 

  Ahrefs

  4.4

  Best for keyword research

  Compare with Similarweb
• 

  Microsoft Clarity

  4.3

  Best for finding checkout drop-offs

  Compare with Similarweb
• 

  DataForSEO

  4.0

  Best for SEO research from Claude Code

  Compare with Similarweb
• 

  Frase

  4.0

  Best for Building SEO content briefs fast

  Compare with Similarweb