Similarweb

Corporate brand

A global digital intelligence and software company that estimates web and mobile usage and turns those data into market, audience, marketing, sales, and search insights.

Last updated August 31, 2026

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Overview

Similarweb is a digital intelligence software company founded in Tel Aviv in 2007 by Or Offer. Its business centers on estimating how people use websites and mobile applications and providing those estimates through analytics products, rankings, datasets, and research tools. The company serves organizations and individuals that need to understand digital audiences, competitors, market categories, acquisition channels, search performance, advertising activity, and app performance. The company originated in a practical problem encountered by Offer while he was trying to grow a jewelry business. He developed a web analytics tool to learn more about competing sites, and that project became the basis for Similarweb. In 2009, Similarweb won the first Israeli SeedCamp, helping attract international attention and early investor interest. At that stage it was frequently described as a competitor to Alexa, another service associated with web-traffic measurement and site rankings. Similarweb's products rely on aggregated information from multiple sources. These include information supplied by data partners and anonymized usage information associated with browser extensions and other company-distributed tools. The resulting datasets are used to estimate traffic, engagement, audience characteristics, acquisition sources, app activity, and other digital behaviors. Because the service is based on modeled and aggregated data rather than a complete census of every user or session, its rankings and measurements are estimates intended for comparison, trend analysis, and market intelligence. The company's product scope has expanded beyond general website measurement. Its platform includes web and app analytics, digital market intelligence, SEO and keyword research, audience and marketing analysis, advertising intelligence, app intelligence, and tools related to generative-engine visibility. Similarweb also publishes rankings for websites and mobile applications. Its ranking system has been described as covering 210 categories across 190 countries, with website rankings updated monthly and app rankings informed by indicators such as downloads, installs, and active-user data from major app ecosystems. Expansion has been supported by outside financing and acquisitions. Naspers led an $18 million Series C investment in February 2014. Soon afterward, Similarweb acquired TapDog, an Israeli early-stage company focused on mobile analytics. Later acquisitions added capabilities in personalized content discovery, mobile data insights, keyword rank tracking, advertising intelligence, app intelligence, and paid-search and affiliate-marketing monitoring. These transactions broadened Similarweb's coverage of the digital marketing and measurement workflow. Similarweb became a publicly traded company on the New York Stock Exchange in May 2021 under the ticker SMWB. Its initial public debut valued the company at approximately $1.6 billion, according to contemporary reference material. The company operates internationally and has maintained a presence spanning Israel, the United States, and other markets. Its current brand position is that of a digital intelligence provider: rather than selling a single analytics report, it combines estimated behavioral data, competitive benchmarking, rankings, research, and workflow software for marketing, sales, strategy, investment, and product teams.

History

Similarweb began in Tel Aviv in 2007, when founder Or Offer was attempting to expand a jewelry business and needed a way to understand competing websites. He developed an analytics tool for that purpose. The tool evolved into a broader service for estimating website traffic and online engagement, eventually becoming the foundation of Similarweb. The company gained an early public and investment profile in 2009 after winning the first Israeli SeedCamp. Its early positioning placed it among services seeking to make the structure and popularity of the web measurable, and it was often compared with Alexa. Similarweb's approach combined information from data partners with anonymized usage signals associated with browser extensions and other company-distributed tools. It used those inputs to model traffic, engagement, audience behavior, and digital-market activity. A significant financing milestone arrived in February 2014, when Naspers led an $18 million Series C round. Within the following month, Similarweb used part of the financing to acquire TapDog, an Israeli early-stage mobile analytics company. This transaction marked an early step in extending the company's focus from websites to mobile applications and mobile usage data. Similarweb continued to expand through acquisitions. In 2015 it bought Swayy, a personalized content-discovery platform developer, and Quettra, a provider of mobile data insights and analytics. The company later acquired Embee in 2021, adding further mobile-data capabilities. RankRanger joined the business in 2022, contributing keyword rank tracking and advanced APIs that were integrated with Similarweb's existing SEO tools. In 2024, acquisitions of Admetricks and 42matters broadened its advertising and app-intelligence coverage. In 2025, Similarweb acquired The Search Monitor, adding solutions for paid-search and affiliate-marketing monitoring. The company's commercial scope developed from website traffic measurement into a broader digital intelligence platform. Its tools support web and app analytics, market research, competitive benchmarking, marketing and sales analysis, SEO, advertising intelligence, app intelligence, and visibility in generative search or answer-engine environments. Similarweb also maintains ranking systems for websites and apps. Reference material describes website and app rankings spanning 210 categories in 190 countries, with periodic updates based on newly collected data. Website rankings emphasize traffic and engagement, while app rankings use signals including downloads, installs, and active-user measures from major app stores. In May 2021, Similarweb became publicly traded on the New York Stock Exchange under the symbol SMWB. The debut valued the company at approximately $1.6 billion. Public listing gave the business a new source of market visibility while its operating model remained centered on aggregated and modeled digital-behavior data. Similarweb has operated internationally, with offices and activities across multiple markets, while retaining its historical connection to both Israel and the United States. Its development reflects the wider shift from standalone web measurement toward integrated intelligence covering the full digital ecosystem: audiences, competitors, channels, search, advertising, applications, and emerging generative interfaces.

2025
The Search Monitor acquisition
[1]Similarweben.wikipedia.org
Similarweb acquired The Search Monitor to add paid-search and affiliate-marketing monitoring solutions.
2024
Admetricks and 42matters acquisitions
[1]Similarweben.wikipedia.org
Similarweb expanded its advertising intelligence and mobile-app intelligence capabilities through two acquisitions.
2022
RankRanger acquisition
[1]Similarweben.wikipedia.org
The acquisition added keyword rank tracking and advanced APIs to Similarweb's SEO capabilities.
2021
Embee acquisition and public listing
[1]Similarweben.wikipedia.org
Similarweb acquired Embee and became publicly traded on the New York Stock Exchange under ticker SMWB.
2015
Swayy and Quettra acquisitions
[1]Similarweben.wikipedia.org
Similarweb acquired Swayy and Quettra, extending its capabilities in personalized content discovery and mobile data analytics.
2014
Naspers leads Series C financing
[1]Similarweben.wikipedia.org
Naspers led an $18 million Series C investment in Similarweb.
2014
TapDog acquisition
[1]Similarweben.wikipedia.org
Similarweb acquired Israeli mobile analytics startup TapDog using a combination of cash and shares.
2009
Wins the first Israeli SeedCamp
[1]Similarweben.wikipedia.org
The company won the first Israeli SeedCamp, increasing its international visibility and attracting investor attention.
2007
Similarweb is founded in Tel Aviv
[1]Similarweben.wikipedia.org
Or Offer founded Similarweb in Israel after developing a web analytics tool to study competitors while growing a jewelry business.

Products and positioning

A digital intelligence and market-measurement platform for analyzing web and app audiences, competitors, acquisition channels, search visibility, advertising activity, and digital market trends.

Digital intelligence platform
Similarweb Digital Intelligence Platform
The core platform combines estimated web and app usage data with analytical tools for market research, competitor benchmarking, audience analysis, marketing evaluation, sales prospecting, and strategic planning. It is designed for users who need a comparative view of digital markets rather than data from only one owned website or application.
Web analytics
Website Analytics
Similarweb's website analytics tools estimate traffic, engagement, audience composition, referral sources, search contribution, and other indicators for websites. The service is used to compare competitors and identify changes in digital performance across markets and categories.
Mobile-app intelligence
App Intelligence
App intelligence products analyze mobile applications across major app ecosystems. Their comparative measures include app rankings and signals such as downloads, installs, and active-user activity, helping customers study app growth, engagement, category structure, and competitors.
Search marketing software
SEO and Keyword Research Tools
The SEO offering supports keyword, search-visibility, and competitor analysis. Rank tracking and related APIs were strengthened through the acquisition of RankRanger, while the broader toolset connects search performance with traffic, audience, and market intelligence.
Advertising analytics · 2024
Advertising Intelligence
Advertising intelligence tools help users examine digital advertising activity and compare how brands and competitors use paid channels. The acquisition of Admetricks expanded this part of the company's product portfolio.
Generative-search optimization
Generative Engine Optimization Tools
Similarweb identifies generative-engine optimization as part of its newer tool scope. These capabilities are intended to help organizations understand and improve digital visibility as users increasingly discover information through generative search and answer interfaces.

Brand decisions

2025
Add paid-search and affiliate monitoringM&A
Background
Similarweb continued to broaden its digital marketing intelligence coverage.
Action taken
The company acquired The Search Monitor, whose solutions address paid search and affiliate marketing.
Aftermath
The acquisition extended Similarweb's monitoring capabilities into additional performance-marketing channels.
Source
2024
Expand advertising and app intelligence through acquisitionsM&A
Background
The company's product strategy increasingly covered advertising activity and mobile-app markets alongside website analytics.
Action taken
Similarweb acquired Admetricks and 42matters.
Aftermath
The acquisitions added advertising-intelligence and app-intelligence capabilities to the platform.
Source
2022
Acquire RankRanger for SEO expansionM&A
Background
Similarweb sought to strengthen its existing SEO tools with more specialized rank-tracking and technical capabilities.
Action taken
The company acquired RankRanger and incorporated its keyword rank tracking and advanced APIs into the SEO offering.
Aftermath
The transaction broadened Similarweb's search-analysis workflow.
Source
2021
Complete public-market debutOther
Background
After developing an international digital-intelligence business, Similarweb pursued a public listing.
Action taken
Similarweb listed on the New York Stock Exchange under ticker SMWB in May 2021.
Aftermath
The debut gave the company public-market status and an approximately $1.6 billion valuation at listing.
Valuation at public debut. $1.6 billion (May 2021)
Source
2014
Acquire TapDog to extend into mobile analyticsM&A
Background
Similarweb was expanding beyond website measurement, and TapDog offered mobile analytics capabilities.
Action taken
The company acquired TapDog in a transaction involving cash and shares, shortly after receiving its Series C financing.
Aftermath
The acquisition supported Similarweb's longer-term development of mobile-app and mobile-data intelligence products.
Source

Recent events

2025
Similarweb acquires The Search Monitor[1]Similarweben.wikipedia.org
M&A
The Search Monitor brought paid-search and affiliate-marketing monitoring capabilities into Similarweb's digital intelligence offering.
2024
Similarweb acquires Admetricks and 42matters[1]Similarweben.wikipedia.org
M&A
The acquisitions added advertising intelligence and mobile-app intelligence capabilities to Similarweb's portfolio.
2022
Similarweb acquires RankRanger[1]Similarweben.wikipedia.org
M&A · Product generation
RankRanger's keyword rank-tracking services and advanced APIs were incorporated into Similarweb's SEO product capabilities.
2021
Similarweb begins trading on the New York Stock Exchange[1]Similarweben.wikipedia.org
Other
Similarweb completed its public debut on the NYSE under ticker SMWB at an approximately $1.6 billion valuation.
2021
Similarweb acquires Embee[1]Similarweben.wikipedia.org
M&A
The acquisition of Embee expanded Similarweb's access to mobile data insights.
2014
Naspers leads Similarweb Series C investment[1]Similarweben.wikipedia.org
Other
Naspers invested $18 million in Similarweb and led the company's Series C financing round.
2014
Similarweb acquires TapDog[1]Similarweben.wikipedia.org
M&A
Similarweb acquired Israeli early-stage company TapDog, adding mobile analytics capabilities through a transaction involving cash and shares.

Sources6 sources

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