Similarweb

Freemium

By AI Bookmarks Editorial Team, Directory editors Last reviewed 2026-10-23

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Web analytics platform estimating traffic, audience and competitor performance from panel and clickstream data.

Quick facts

Pricing	Freemium
Free tier	Limited — free extension and a small number of free lookups
Platforms	Web, Chrome extension, API
Developer	Similarweb
Website	https://www.similarweb.com

What Similarweb is

Similarweb estimates website traffic and audience behaviour from a combination of panel data, clickstream and public sources. You enter a domain and get estimated visits, traffic sources, geography, engagement and the keywords driving search traffic, then compare it against competitors. That makes it useful for market sizing, competitive research and partner due diligence, where a directional estimate is enough. It also offers app analytics and audience overlap. The limits are methodological: figures are estimates rather than server logs, accuracy is best for large sites and thin for small or niche ones, and the most detailed data sits on enterprise plans. Treat any single number as a range, and cross-check important conclusions against another source. A browser extension shows a site estimate while browsing, which is how most people first use it. Keyword data covers organic search terms, and referral traffic shows which sites send visitors. Comparison views put several domains on one chart.

Best for

Sizing a market or a competitor before entering it
Comparing traffic sources across rival domains
Due diligence where directional numbers are enough

Not ideal for

Auditing your own site, where analytics data is better
Small or niche sites with thin panel coverage

Pros

Fast comparison across many domains
Traffic source and geography breakdowns
App data alongside web data

Cons

Figures are estimates, not measurements
Accuracy drops for small sites
Detailed data sits on enterprise plans

Pricing in detail

A free browser extension shows limited metrics, and a small number of lookups are available without a subscription. Paid plans are billed monthly or annually and scale by the number of tracked domains, users and report exports; enterprise contracts add API access and custom datasets. Because accuracy and depth both rise with the tier, the useful question is whether the plan you can afford covers the domains you actually need to compare.