Semrush vs Similarweb for watching competitors

Semrush vs Similarweb comes up when the job is keeping an eye on competitors rather than optimizing your own site. Both will tell you something about a rival's website. They answer different questions, though: Semrush starts from search keywords, Similarweb starts from traffic. And if you only check rivals now and then, a per-report tool like seogeoaeo.ai can answer the most common questions from both for a fraction of either price.

Prices were checked on each vendor's pricing page in October 2026.

What each one is built to watch

Semrush is an SEO suite. Its core plans cover keyword research, competitor analysis, rank tracking, site audits and AI search tracking. Its SEO plan costs $139 a month ($117.33 billed annually) for 5 websites and 500 keywords tracked daily. The fuller competitor insights tools come with Starter at $199. Traffic and market research is a separate Traffic & Market toolkit on top.

Similarweb is a traffic intelligence platform. Its Competitive Intelligence plan costs $199 a month, or $125 a month billed annually, and covers website performance, traffic and engagement, demographics and competitor alerts. Adding a full SEO toolkit and AI search visibility moves you to the Competitive Intel & SEO & AEO plan at $399 a month ($333 yearly). The plan that also adds ad intelligence costs $649 a month.

Side by side

Pick Semrush if your competitor questions are about search: which keywords a rival ranks for and how your positions compare. Pick Similarweb if they are about audience: how much traffic a rival gets in total, how engaged it is, and who visits.

The lighter option for spot checks

Most competitor watching is not continuous. A new rival launches, a competitor raises money, or a sales call mentions a name you do not know. You want a snapshot, then you move on.

seogeoaeo.ai sells those snapshots one at a time, on credits from $29 a month for 2,000:

• Domain Overview, 50 credits. How many Google keywords a site ranks for, its estimated monthly visits from search, what those visits would cost as ads, and how many sites link to it.
• Competitor Keywords, 35 credits. Up to 100 of its keywords, ordered by estimated visits.
• Competitor Finder, 38 credits. Sites that compete with yours in Google, split into close competitors and large general sites.
• Competitor Google Ads, 15 credits. Up to 100 of its recently shown Google ads, with the wording of up to 10 text ads.
• Meta Ad Finder and LinkedIn Ad Finder, 5 credits each. The ads it runs on Facebook, Instagram and LinkedIn.

A typical spot check runs Competitor Finder on your own domain, then a Domain Overview and Competitor Keywords on the closest name it returns. That is 123 credits, so the Indie plan covers the routine many times over in a month.

That covers the search side of Semrush's competitor view and the search-traffic part of Similarweb's, for occasional use. Every plan includes MCP and REST, so an AI agent can run the same reports.

Where seogeoaeo.ai stops

Be precise about the trade-off. Its visit estimates cover traffic from Google search, not a site's total traffic, engagement or demographics; that is Similarweb's ground. It does not track rankings, keeps no history of how a rival changed, and does not send alerts when a competitor moves. Its numbers come from a third-party provider and are estimates.

For ongoing alerts, Similarweb's entry plan includes competitor alerts. Readers who already use a web monitor can also watch a competitor's pricing or product pages directly for changes, and use a seogeoaeo.ai competitor report when a change calls for a closer look.

Which to choose

• You check rivals a few times a month: seogeoaeo.ai.
• You need total traffic, engagement and audience data: Similarweb.
• Your team lives in search data and tracks rankings daily: Semrush.

If you need both search and traffic data every day, compare Similarweb's $399 package with Semrush plus its Traffic & Market toolkit. For everyone else, start with the smallest credit plan.