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Semrush vs Similarweb: A Detailed 2024 Comparison

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  • Post last modified:7 June 2024

In the dynamic realm of digital marketing, the comparison between Semrush vs Similarweb presents a pivotal discussion for marketers and SEO professionals seeking robust tools for their strategy optimization. Both platforms have emerged as front-runners, offering a vast array of features aimed at improving online visibility and market research, but selecting the right tool can be a daunting task. Given their importance in crafting effective digital strategies, understanding the nuanced differences and strengths of each platform is critical. Our exploration delves into this comparison, aiming to provide clarity and assist in the decision-making process, whether one is looking for a Semrush alternative, a Similar web alternative, or insights into websites like Similarweb and websites similar to Semrush.

We will thoroughly review each platform’s capabilities across various dimensions, including data collection methods, keyword research facilities, competitor analysis utilities, as well as on-page SEO and technical SEO capabilities. Additionally, the comparison will extend to their pricing and subscription models, offering a comprehensive perspective to inform your choice. By examining these aspects, our goal is to elucidate not only how these tools stand in terms of features but also to gauge the similarweb accuracy, hence equipping our readers with the knowledge to decide between Semrush and Similarweb or explore other websites like Semrush based on their specific needs.

Overview of SEMrush and SimilarWeb

Features Overview

SEMrush and SimilarWeb offer extensive features tailored for digital marketing analysis, but with distinct focuses and methodologies that influence their effectiveness in different scenarios. SEMrush has developed a robust suite of tools over the last decade, which includes capabilities for monitoring competitors’ search positions, paid search strategies, and social media activities, along with detailed website traffic data [10]. These tools rely on data from diverse sources like SEO, PPC, content marketing, and social media, ensuring relevance and depth in the insights provided [10].

On the other hand, SimilarWeb provides a broad view of website performance, drawing on data from over a billion websites and mobile apps. It excels in delivering real-time insights with features like the ‘Last 28 days’ view, which allows users to spot trends as they happen, unlike the monthly updates provided by SEMrush [11]. SimilarWeb’s data sources include direct data from website owners, partnerships with internet providers, and anonymized panel data from browser extensions, which enrich the platform’s traffic and engagement metrics [9].

Primary Uses

Both platforms are designed to enhance digital marketing strategies but cater to slightly different needs based on their data collection and processing strengths. SEMrush is particularly strong in SEO and PPC fields due to its comprehensive crawling capabilities, which include daily crawls of up to 500 million web pages. This extensive data collection enables SEMrush to offer detailed insights into keywords, backlinks, and competitor strategies, making it a preferred tool for SEO professionals looking to dive deep into data-driven optimization [12].

In contrast, SimilarWeb’s strengths lie in market research and competitive analysis, especially for eCommerce, retail, and consumer goods companies. It is widely used for understanding market trends, audience behavior, and competitive positioning, providing users with a strategic view of their industry’s digital landscape. The tool’s ability to track consumer behavior and mobile web traffic makes it invaluable for businesses focused on these areas [8].

Both SEMrush and SimilarWeb provide valuable insights into digital marketing, but the choice between them should be guided by specific business needs—whether the focus is on in-depth SEO and backlink analysis or broader market trends and competitor insights [7] [8].

Data Collection Methods

SEMrush Data Sources

SEMrush utilizes a multifaceted approach to data collection, combining machine learning with third-party data to estimate various keyword metrics. This includes analyzing both organic and paid search results up to the top 100 positions to calculate website rankings [19]. Additionally, SEMrush’s Traffic Analytics reports are derived from anonymized data collected from third-party sources, processed using artificial intelligence algorithms to approximate user behavior on millions of internet users [20]. Our proprietary web crawler plays a crucial role, continuously scanning the internet to gather comprehensive data on organic search traffic, page authority, domain authority, and keywords [21]. This crawler supports our ability to provide detailed insights into backlinks as it combs through over 25 billion web pages daily [13]. Moreover, for search engine rankings and keyword analytics, we rely on third-party data providers to collect and analyze Google’s actual search results pages for the hundreds of millions of the most popular keywords [13].

SimilarWeb Data Sources

SimilarWeb’s data collection strategy is extensively varied, incorporating first-party analytics from millions of websites and apps [19]. It also benefits from anonymous traffic data sourced when users install SimilarWeb products on their devices [19]. The platform employs a combination of data from proprietary databases, web crawlers, and third-party providers to deliver refined and accurate metrics for SEO needs [21]. Direct data from website owners, data shared by partners and internet providers with millions of users, and public data sources including patented technologies are integral to SimilarWeb’s data collection [20]. Additionally, anonymized panel data from browser extensions on visited websites enrich the platform’s insights, allowing for real-time analysis and trend spotting [20]. This comprehensive data sourcing strategy enables SimilarWeb to track consumer behavior and mobile web traffic effectively, providing users with a strategic view of their industry’s digital landscape [21].

Keyword Research Capabilities

Depth and Accuracy of Keyword Analysis

Semrush’s Keyword Overview report provides a comprehensive analysis of keyword potential, including global volume, country-specific volume, keyword difficulty, search intent, and keyword clusters [28]. This depth of information facilitates a detailed understanding of keyword performance and strategy development. In contrast, Similarweb’s keyword overview report lacks critical data on SERP and competitor keyword analysis, which are both essential for thorough keyword research [28].

Semrush’s dedicated Keyword Research tool offers extensive data on search volume, keyword difficulty, and competitive density, making it a more suitable tool for in-depth keyword research [29]. The platform’s large database, which includes over 40 trillion inbound links, provides a robust foundation for accurate and comprehensive keyword analysis [30]. This extensive data collection is crucial as it influences the accuracy of keyword research, giving Semrush an edge over Similarweb [30].

Additional Tools for Keyword Research

Semrush’s Keyword Magic Tool houses over 25.8 billion keywords, making it the largest keyword database on the market [22]. This tool allows users to segment terms by topic, perform detailed analyses, and export findings to other Semrush tools, enhancing both SEO and PPC campaigns [22]. The Keyword Overview report and Keyword Magic Tool collectively offer a clean user interface and a comprehensive toolkit for keyword research, which is highly valued by digital marketers [28].

On the other hand, Similarweb provides unique features such as the ability to research keywords for Google, Amazon, and YouTube. However, the usefulness of these features is limited without a custom pricing plan, and the platform generally offers less flexibility in filtering and analyzing long lists of keywords [28]. Despite this, Similarweb’s Keyword Generator is a core feature of its Digital Marketing Intelligence platform, offering fresh, accurate, and relevant search terms based on real-user data [26]. This tool also supports keyword analysis across multiple platforms, including Amazon and YouTube, which can be integral for a unified digital marketing strategy [26].

Both platforms offer integrations with popular SEO tools like Google Analytics, Google Ads, and Google Search Console, which can enhance the utility and efficiency of conducting keyword research by allowing data to be cross-referenced and more deeply analyzed [29].

Competitor Analysis Features

Traffic Analysis

Semrush and SimilarWeb offer robust tools for analyzing traffic, which are essential for understanding the competitive landscape. Semrush provides insights into competitors’ online presence and is particularly useful for SEO competitor analysis, market research, and strategy planning [34]. The platform’s .Trends solution includes tools that allow users to research emerging market trends, assess the competitive landscape, explore competitor marketing strategies, and analyze market audiences [34]. This makes Semrush a preferred choice for digital marketers focused on comprehensive competitor insights.

On the other hand, SimilarWeb shows traffic sources for websites up to six months with detailed distribution by devices and social channels, which is valuable for e-commerce sites [34]. This feature, however, is available under the Professional plan priced at $399 monthly, whereas Semrush offers a similar feature at a more competitive price with its .Trends solution [34].

Comparison of Competitor Insights

When comparing the accuracy and utility of competitor insights provided by Semrush and SimilarWeb, it’s clear that both platforms have their strengths. Semrush’s Traffic Analytics tool is derived from a combination of machine learning and third-party data, which helps in estimating various keyword metrics and provides insights into organic and paid search results [36]. This tool is particularly precise for websites with high traffic volumes, showing smaller deviations in data accuracy when compared to Google Analytics benchmarks [36].

SimilarWeb, while offering a broad range of data including direct data from website owners and anonymized panel data from browser extensions, shows larger inaccuracies in its data for websites with lower traffic [36]. This suggests that Semrush may be more reliable for businesses with substantial online traffic looking for accurate competitive insights.

Both services provide valuable insights, but the choice between Semrush and SimilarWeb should consider the specific needs of the business, particularly in terms of traffic volume and the level of detail required in competitor analysis [36].

On-Page SEO and Technical Capabilities

Site Audits

Semrush’s Site Audit tool is incredibly useful for analyzing your website’s “health.” By crawling your website, it identifies critical issues that need immediate attention. For instance, during a recent audit, it took only a few minutes to customize the settings and receive a prioritized list of issues, which is highly beneficial for addressing urgent problems like 4xx errors [43]. Additionally, Semrush’s comprehensive web crawler supports daily scans of the internet, gathering extensive data on organic search traffic, page authority, domain authority, and keywords, which enhances the ability to provide detailed insights into backlinks [38].

SEO Tools

On-Page SEO optimization is crucial for enhancing the visibility of your website in search engine results. Semrush’s On-Page SEO Checker simplifies this task by auditing your website content and suggesting improvements. For example, I was able to generate 135 improvement ideas for 21 web pages, which are projected to boost my website’s organic traffic significantly. These suggestions included semantically-related keywords, user experience enhancements, SERP feature ideas, and content writing tips modeled after top-performing websites [43].

In contrast, Similarweb’s Site Audit tool also offers valuable insights but focuses more on providing a holistic view of your site’s health and performance. It allows for scheduled and automated website crawls and sets alerts for crucial SEO metrics, helping maintain your site’s ranking [42]. However, it lacks some of the more advanced features found in Semrush, such as detailed backlink analysis, which is essential for effective link building [44].

Semrush’s toolkit includes a variety of SEO tools that are indispensable for improving search engine rankings. These tools cover everything from keyword research and site audits to backlink analysis. The backlink analysis tool, for instance, provides an overview of all websites linking to yours, helping to assess the quality of these links and discover new link-building opportunities [45].

Moreover, Semrush and Similarweb integrate with popular SEO tools like Google Analytics, Google Ads, and Google Search Console. This integration enhances the utility and efficiency of conducting comprehensive SEO analyses by allowing data to be cross-referenced and more deeply analyzed [29].

Through these capabilities, Semrush and Similarweb equip users with the necessary tools to conduct thorough on-page SEO and technical optimizations, albeit with some differences in the extent and depth of the features offered.

Pricing and Subscription Models

SEMrush Pricing Plans

SEMrush offers a variety of pricing plans to cater to different needs, starting with the Pro plan at $129.95 per month, which is ideal for bloggers and small teams managing up to five websites [47][48]. This plan can be more economical on an annual basis, costing $108.33 per month, which involves a higher upfront cost but offers substantial savings [47][48]. For more extensive needs, the Guru plan is available at $249.95 monthly, providing advanced features like the Content Marketing Toolkit and historical data [48]. The most comprehensive plan, the Business plan, costs $499.95 per month and is tailored for large agencies and enterprises, offering the highest limits and advanced features like API access and PLA analytics [48].

Each plan includes essential tools for SEO, PPC, and competitor analysis, with varying limits on the number of projects, keywords to track, and results per report [46][48]. For instance, the Pro plan allows for 500 keywords to track and 10,000 results per report, while the Business plan significantly extends these limits [46][48]. Additionally, SEMrush offers a free trial with all core features available, which can be extended to 14 days, providing a comprehensive opportunity to evaluate the platform’s capabilities [47].

SimilarWeb Pricing Plans

SimilarWeb also offers several pricing tiers, starting with the Starter plan at $125 per month when billed annually, or $149 on a month-to-month basis [49][50][51]. This plan is designed for individuals and startups, offering up to 100 website results per table and 1,000 keyword results per table, with three months of historical data [49][51]. For more advanced needs, the Professional plan costs $333 per month when billed annually, providing enhanced features like up to 5,000 keyword results per table and six months of historical data [49][50].

For larger organizations, SimilarWeb provides the Team plan with custom pricing, which includes up to 10,000 website results per table and 15 months of historical data [49]. The most extensive plan, the Enterprise plan, offers custom pricing for mature organizations and includes unlimited websites per table, up to 150,000 keyword results per table, and 37 months of historical data [49]. These plans are complemented with services such as access to Similarweb Academy, priority support, and dedicated account managers to ensure effective utilization of the platform’s capabilities [49].

Both SEMrush and SimilarWeb offer flexible pricing models that reflect the breadth and depth of their features, catering to a wide range of users from individual bloggers to large enterprises [52][53].


Through a comprehensive comparison, we have navigated the vast landscapes of Semrush and Similarweb, two powerhouses in the digital marketing arena, each with their unique strengths and offerings. From in-depth discussions on data sources, keyword research capabilities, to competitor analysis features, and on-page SEO technical tools, this analysis has endeavored to provide a clear vantage point. Such scrutiny brings to light the pivotal role these platforms play in enhancing digital strategies, whether the need is for granulated SEO insights offered by Semrush or the robust market trend analysis provided by Similarweb. As we dissected their pricing models, it became apparent that each caters to a spectrum of users, from startups to large enterprises, emphasizing the platforms’ flexibility and scalability.

Conclusively, the journey through Semrush versus Similarweb underscores the criticality of choosing a digital marketing tool that aligns with one’s strategic objectives, be it for in-depth SEO analysis or broader market insights. It accentuates not only the necessity of such tools in the digital marketers’ arsenal but also the importance of understanding their nuances to leverage their full potential. As we move forward in an ever-evolving digital landscape, the insights drawn from this comparison could serve as a beacon for professionals and enterprises alike, navigating towards informed decision-making in selecting a tool that best suits their digital voyage.


1. Which tool provides more accurate data, SimilarWeb or Semrush?
Both SimilarWeb and Semrush offer comprehensive web analytics data. SimilarWeb is generally more suitable for mid-sized to large businesses and focuses primarily on website statistics. Semrush, on the other hand, offers extensive tools for online visibility including traffic analytics, PPC, SEO, and social media. The accuracy and utility of each tool can depend on your specific needs in these areas.

2. What are some alternatives to Semrush that might be better?
BrightEdge is a top contender as an alternative to Semrush. It excels as an SEO management and reporting tool, offering features like keyword and page reporting, data cube, instant dashboards, and competitive analysis. These functionalities help in tracking and reporting crucial metrics effectively.

3. How reliable is the traffic data from SimilarWeb?
SimilarWeb’s traffic data tends to overestimate actual traffic volumes by approximately two to three times. While this may seem like a significant error, it remains consistent across different sites, which means you can still use SimilarWeb to make relatively accurate estimates of traffic for competitors and potential customers.

4. How accurate is the traffic data from Semrush?
Semrush provides highly accurate data for specific areas such as backlinks and keyword research. However, it is less reliable for social media and paid search data. If your primary focus is on these latter areas, you might want to consider this when evaluating the accuracy of Semrush’s data.


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