Similarweb

In 2007, Or Offer and Nir Cohen founded SimilarGroup, which used algorithms it developed to help users find relevant online content. Its products included SimilarSites, a search engine for finding alternatives to any website, and TopSite, which listed the top ten websites in each category.⁠[1][2][1][1]

In February 2009, the company was incorporated under the Israel Companies Law and commenced operations, with Or Offer serving as chief executive officer and a board member since that time. In its early years the company was known for its branded browser plug-ins such as SimilarWeb and SimilarSites, which suggested websites similar to the one a user was visiting and provided information such as web rankings, traffic sources, and reach.⁠[3][3][4]

In June 2010, SimilarGroup completed its first financing round, raising $1 million from investors including Docor International BV, Naftali Investments, Yossi Vardi, and other private investors.⁠[1]

In 2013, the company launched its digital data platform.⁠[3]

In February 2014, SimilarGroup completed a Series C round funded entirely by Naspers, the South African media group, which gained a board seat; the company had previously raised $7.1 million in seed through Series B rounds. At the time, SimilarWeb analyzed web rankings through a panel of millions of web surfers and planned to expand into mobile.⁠[4][4][4][4]

In July 2017, SimilarWeb raised $47 million in growth equity funding led by Viola Growth with participation from Saban Ventures, bringing its total funding to $112 million. Harel Beit-On, founder of Viola Growth, has served on the company’s board since June 2017.⁠[5][5][6]

In October 2020, SimilarWeb raised $120 million in a round co-led by ION Crossover Partners and Viola Growth, including both primary and secondary components, bringing its total funding to $240 million. The company then had just under 600 employees and planned to open offices in North America and Europe and expand through mergers and acquisitions.⁠[7][7][7]

On May 12, 2021, Similarweb listed on the New York Stock Exchange under the ticker symbol SMWB. The initial public offering totaled 8 million shares at $22 per share, of which the company sold 7.5 million and chief executive officer Or Offer, as selling shareholder, sold 500,000; the company estimated net proceeds of approximately $149.6 million. J.P. Morgan, Citigroup, Barclays, and Jefferies acted as joint book-running managers, and the offering closed on May 14.⁠[8][8][6][6][9][9][9]

In November 2021, the company acquired Embee Mobile, a U.S. mobile audience analytics and consumer panel company, for cash consideration of approximately $9.06 million plus contingent consideration.⁠[10][10][10]

In May 2022, the company acquired Internet Marketing Center, an Israeli search engine optimization and rank tracking company, and purchased certain assets of its affiliate Rank Ranger LLC.⁠[10][10][10]

Due to market conditions in 2022, the company re-evaluated its organizational structure and reduced its workforce by approximately 10% in the fourth quarter of that year; it had 1,017 employees at the end of 2022.⁠[10][10]

On March 4, 2024, the company acquired Admetricks, a Chilean ad monitoring company that estimates competitors’ ad spending and provides media campaign planning; on July 1 of the same year it acquired 42matters, a Swiss app intelligence company, for cash consideration of approximately $12.78 million.⁠[3][3][3][3]

In 2025, the company acquired the competitive intelligence software company Signal Insights (January 31), the ad monitoring and brand protection software company The Search Monitor (February), and the Swedish keyword rank tracking tool company Wincher (April); it acquired one more company in the first quarter of 2026.⁠[3][3][3][3][3][3]

On February 19, 2026, Or Offer used personal funds to buy 40,000 shares of the company in open market transactions at an average price of $2.45 per share, a total of approximately $98,000.⁠[11][11]

In 2025, the company’s revenue was $282.6 million, up 13.1% year over year, with a net loss of $32.9 million (compared with $11.5 million in 2024). As of the end of 2025, the company had 6,128 paying customers, 454 of which generated annual recurring revenue (ARR) of $100,000 or more, and 1,000 employees, including 536 in Israel, 225 in the United States, 165 in Europe, and 74 in Asia Pacific.⁠[3][3][3][3][3]

On March 26, 2026, Harel Beit-On, co-founder of the Viola Group and general partner of Viola Growth, became chairman of the board.⁠[12][12]

On May 13, 2026, the company announced that Or Offer had informed the board of his intention to step down as chief executive officer, and the board initiated a formal search for his successor; Offer would remain in the role through the end of the transition, which was expected to be completed by mid-2027.⁠[2][2][2]

On August 12, 2026, the company reported second-quarter results: revenue of $77.2 million, up 9% year over year, and GAAP operating profit of $0.7 million, its first quarter of positive GAAP operating profit. Annual recurring revenue surpassed $300 million in June; during the quarter it signed three multi-year contracts with a total contract value of approximately $60 million and raised its full-year guidance for the second time. In June, the company integrated with Perplexity, embedding its digital data and MCP connector into Perplexity Computer’s workflows.⁠[13][13][13][13][13][13][13]

On September 24, 2026, the board appointed Michael Akkerman as chief executive officer, effective November 2, 2026, succeeding Or Offer; Offer will continue to assist during a transition period. Akkerman was then chief business officer of Digital Turbine and previously served as chief revenue officer of data.ai (formerly App Annie); he will be based in the New York office. The company scheduled a special general meeting of shareholders at its headquarters on November 16, 2026, to consider his compensation terms.⁠[14][14][14][14][14][15][15]

The company positions itself as a data business. Its core data, Similarweb Digital Data, is an estimate of user actions and transactions across websites and apps worldwide, structured and normalized for use in analytics, automation, and machine learning model development. Its software platform includes products such as Web Intelligence, App Intelligence, Retail Intelligence, Sales Intelligence, and Stock Intelligence; the company also offers data feed APIs and exports through its Data as a Service (DaaS) offering, as well as advisory services. Its clients span industries including retail, consumer packaged goods, finance, consulting, marketing and advertising agencies, media and publishing, software, travel, and institutional investors, as well as organizations building data-driven and AI products.⁠[3][3][3][3][3][3][3]

Similarweb: Official website: https://www.similarweb.com/ (opens in a new window).⁠[3]

X: Public account: https://x.com/similarweb (opens in a new window)⁠[16]

LinkedInLinkedInLinkedIn is a social networking platform for professionals. It was founded in 2002 by Reid Hoffman and others, launched in 2003, and listed on the New York Stock Exchange in 2011; after Microsoft acquired it for approximately $26.2 billion in 2016, it became a wholly owned Microsoft subsidiary. Its revenue comes from membership subscriptions, advertising, and recruitment solutions.Open the full entry: Public profile: https://www.linkedin.com/company/similarweb (opens in a new window)⁠[16]

YouTubeYouTubeYouTube is Google’s video-sharing and creator platform, founded in 2005 by Steve Chen, Chad Hurley, and Jawed Karim and acquired by Google in 2006. Built around video uploading, viewing, and creator earnings, the platform has developed Shorts, YouTube Music, Premium, YouTube TV, and products for children, and is headquartered in San Bruno, California, United States.Open the full entry: Public channel: https://www.youtube.com/channel/UCVCI01HR6iB4AA4ChW08cvQ (opens in a new window)⁠[16]