Semrush vs SimilarWeb 2026: Which is the Best Analytics Tool?

Many web analytics tools help you understand your audience, traffic, keywords, competitors and benchmarks. Today, we will review two of the most-used digital marketing intelligence tools: Semrush vs. Similarweb.

Each of these marketing tools collects and processes web traffic data differently. They present marketers with data differently and for different uses.

One tool tends to be more efficient based on data sources, database sizes, and the sheer number of available tools.

In this article, I walk you through the key differences between Semrush and Similarweb. You will see why one tool is better than the other.

By the end of this comparison, you can decide which tool best fits your marketing needs and budget.

And which is not…

Ready? Let’s dive in…

Semrush vs. Similarweb – Which is Better?

Before we begin, note this…

We will evaluate each tool by key marketing features, free plan, database size, keyword tool, pricing, data accuracy, link-building tool, etc.

With these, you’ll see how the tools compare. So, let’s get started…

Free Basic Plan

Since you want to see Semrush vs. Similarweb, which tool should you use? I think it will help to walk you through what each tool includes in its basic and free trial plan.

Semrush

While both Semrush and Similarweb offer a 7-day free trial, the Semrush free plan gives you access to more marketing tools.

With the Semrush free user account, you can access all keyword tools, including position tracking tools, Keyword Magic, Keyword Gap, etc.

You also get access to advertising research tools, social media, link building, traffic analytics, site audits, and more.

However, your account is limited in how much data you can pull through. With a free user account and limited SEO needs, you’re good with limited marketing data in Semrush’s free user account.

Similarweb

Yes, a 7-day Similarweb free trial offer lets you see how the Similarweb marketing data analytics works.

Most advanced marketing features are locked after the 7 days. To unlock them, you’ll need to upgrade.

In the Similarweb free basic plan, you only access the website research analysis features – web performance and competitive landscape (up to 5 results).

All other marketing intelligence tools are locked for an upgrade.

Semrush offers more to free users than Similarweb does on its free plan.

In this aspect, Semrush is better than Similarweb

All-in-One Marketing Tool

Semrush

With over 50+ marketing tools, Semrush is an all-in-one marketing tool designed to manage your everyday digital marketing tasks.

Semrush lets you do SEO (on-page and off-page), content marketing, PPC, social media management, keyword research, and competitor research from one platform for individuals, SEO professionals, businesses, and agencies.

Semrush aims to be your one-stop solution for digital marketing tasks.

For each project launched on the Semrush platform, you have access to a variety of advanced digital marketing tools:

Similarweb

Similarweb is heavily focused on web analytics and competitive intelligence tools. Similarweb primarily analyzes website traffic and performance and uncovers marketing strategies to help you grow your business.

It is not a complete marketing platform that lets you do everyday SEO tasks, content optimization, social media, link-building analysis, or even local SEO listings.

If you’re looking to audit your website for possible on-page SEO errors and recommendations, Similarweb is not an efficient tool.

There is a limit to what you can and can’t do with Similarweb.

Advanced Marketing Tools and Features

Semrush

Semrush offers an all-in-one marketing platform with every tool you need to run an effective SEO and content marketing campaign.

Semrush’s marketing tools include full-fledged SEO tools.

From site audit, link building, link analysis, keyword research, competitive research and analysis, advertising, content research, social media, etc.

This tool offers more advanced features for SEO professionals and agencies than basic SEO tools.

Similarweb

Similarweb, on the other hand, does not provide tools for most of these SEO and content marketing tasks.

For instance, you can’t run a site audit on Similarweb. Therefore, you can’t use Similarweb to fix on-page SEO errors on your website.

Similarweb is more useful for web analytics and gathering marketing intelligence for your marketing campaign.

Clear Pricing Details

Semrush

Each Semrush plan, feature, and pricing is visible on the website.

There are no hidden marketing tricks or gimmicks. At a glance, you will see what’s in each Semrush plan, its features, and pricing.

This lets you make an informed decision based on your business needs and budget.

Here’s the pricing plan on the Semrush website:

If you subscribe to an annual Semrush plan, you’ll save 16% on your total payment. This is a better deal for businesses that have needed SEO services for a long time.

Similarweb

Similarweb doesn’t show pricing details on its website.

Aside from the 7-day Similarweb free trial offer, the following pro plan is enterprise-level.

You’ll have to talk to a consultant/specialist to discuss a marketing plan that fits your business needs and budget. This could be a potential turn-off for many businesses and marketers.

Few people have the time, courage, or patience to talk to a customer rep before buying the company’s products.

I’d love to see Similarweb work this out sooner rather than later. It would be more helpful if the website included a clear pricing page and plan structure.

This will bring the company more transparency, a detailed billing structure, and customer satisfaction.

Link Building Tools

Semrush

As a complete SEO tool, Semrush offers features and tools to start and complete your link-building campaign.

The Semrush backlink analytics tool lets you analyze any website link profile in minutes.

With the Semrush backlink audit tool, you can easily identify potentially harmful links. And remove them in time to avoid a Google penalty.

You can also track lost and new backlink profiles over time. This feature lets you keep your link-building profile up to date.

When writing this line, you can track the historical data of any website link profile for up to 8 years.

With over 17bn URLs crawled daily, the Semrush backlink index is one of the largest on the planet today. It’s also the freshest and fastest to report link-building profiles.

Similarweb

Similarweb has no dedicated link-building tool.

You can use Similarweb’s referrals tool for link-building campaigns, but it provides only basic link data for the analyzed website.

You can do little with the data it provides. You can only see the root domain linking to a website. It provides no SEO data on the exact linking page.

This makes SimilarWeb nearly unusable for link-building outreach campaigns.

Data Accuracy

Semrush

Semrush is built on anonymous user data (actual consumer behavior), databases with more than 25bn keywords, real Google SERP data, and other third-party sources.

With over 43tn backlinks in its index, Semrush marketing data is among the most accurate available.

Semrush helps small, medium, and large businesses run SEO and marketing research efficiently.

Even if your website gets less than 10k monthly visitors, you can use Semrush to analyze your web traffic data.

Read my extensive review of Semrush data accuracy and methodology to better understand how and where Semrush gets its data.

Similarweb

Similarweb, on the other hand, relies on its web crawler, user panel, and public data through first-party analytics tools such as Google Analytics.

For websites with fewer than 50k monthly visits, reporting data can vary widely. Or there may be no data reporting at all.

For instance, when I analyzed this website with less than 10k monthly traffic, Similarweb couldn’t return any traffic data.

Below, I analyze this website with less than 10k monthly traffic in Semrush and Similarweb using the domain overview tools.

As you can see, Semrush returns the domain overview metrics analysis, but not Similarweb.

CyberNaira analysis in Semrush domain overview tool…

CyberNaira analysis using Similarweb competitive analysis website overview tool.

Semrush vs Similarweb – Features vs Features Comparison

Semrush.Trends come from a comprehensive suite of tools, including SEO, PPC, Keyword research, advertising, social media, and content marketing.

While Similarweb focuses on web analytics and statistics, Semrush and Similarweb are both feature-rich tools.

Let’s see how Similarweb vs Semrush compares feature-wise…

Keyword Research Tool

Semrush

When writing this line, Semrush’s keyword database includes over 20bn search queries.

The keyword tool can return over 14 million ideas for a single seed keyword. This makes analyzing keyword ideas with the Semrush keyword tool more efficient than most paid keyword tools.

With the Semrush keyword tool, you can see any keyword’s organic and advertising value. This feature helps advertisers, affiliate marketers, and businesses that use content for growth.

It helps to target the right keywords with high commercial intent.

The Keyword Magic tool in Semrush provides more helpful search filters to run keyword research efficiently.

You can filter by:

Users on the Semrush free plan can access the position tracking tool for up to 10 keywords. In comparison, the free trial Semrush Pro plan gives you more. You can track up to 500 keywords during your free trial.

Similarweb

Similarweb’s keyword tool isn’t as comprehensive as Semrush’s. However, it does have one keyword feature worth mentioning here.

Similarweb’s traffic share per keyword feature is a helpful tool that lets you analyze traffic percentage per keyword against your competitors.

You can see who gets the most SERP traffic share for a particular keyword and where you stand in the SERP. This information can help optimize your target keywords for competitive analysis.

Head-to-head, the keyword generator tool feature in Similarweb lets you analyze keyword performance by:

For competitive market analysis, you can also research top-performing keywords by landing page, ad campaign, and country-specific data for deeper marketing insight.

In Semrush, you can access keyword features with a free user account; in Similarweb, you need a Pro account.

Social Media Tool

Semrush

Whatever the Semrush plan, you can access the Social media marketing tool.

This tool includes social media tracking, posting, and ad features.

You can connect up to 7 social media profiles, including Facebook, LinkedIn, Twitter, Google My Business listing, Pinterest, YouTube, etc.

You can schedule posts to multiple social media accounts and manage engagements from within each social media profile.

There are options to schedule, send now, set up regular posting, add to queue, and save as a draft.

Similarweb

Similarweb has no social media management tool.

Competitive Traffic Analysis

Semrush

According to Statista, mobile traffic accounts for 54.8% of all internet traffic from the first quarter of 2015 to the same period in 2021.

So access to mobile traffic data isn’t optional; it’s a must in today’s digital marketing world.

The competitive traffic analysis tool is part of Semrush.Trend features.

It gives you access to both desktop and mobile traffic data. This helps you better analyze your traffic sources and understand where you should invest and optimize more.

Access to desktop and mobile traffic data is available to all Semrush users, including free accounts.

However, the free plan offers limited data. For more comprehensive traffic analysis data, upgrade to Semrush.Trend package for an additional $200/month.

Below is the Semrush.Trend pricing comparison for each Semrush standard plan.

Similarweb

While there are available desktop traffic data, you must purchase mobile traffic data analysis access separately.

Source Data Collection

For data accuracy, it’s crucial to analyze how Semrush and Similarweb collect their data for marketing uses.

After all, information is as authentic as the sources.

Semrush

Semrush uses several methods to collect data.

Depending on the marketing metrics, Semrush collects data from trusted partners, Google search result pages for more than 500 million popular keywords, clickstream data from hundreds of partners, and public APIs from social media sites.

Also, Semrush uses its own machine-learning algorithm to present the data in its databases. This makes Semrush data more relevant and accurate.

Similarweb

Similarweb uses several data sources to gather marketing intelligence information for its users.

It uses data from direct website owners, partners, and internet providers with millions of users. It also collects data from public, patented technologies and indexing mechanisms that regularly scan public data.

Like Alexa, Similarweb also uses browser extensions on the visited websites to collect data for research and marketing purposes.

Semrush vs Similarweb Pros and Cons

Conclusion…

While top marketing professionals widely use both tools, Semrush is more robust and used by nearly 7 times as many SimilarWeb users.

Unless your business SEO needs are fundamental, you may only need web analytics data. Semrush is the preferred SEO and marketing tool for professional SEOs, agencies, individuals, and small business owners.

If you want to spend your marketing budget and time wisely, choose Semrush over Similarweb. This will help you get more SEO and content marketing tools for less.