is calculated according to the collected datasets and updated on a monthly basis with new data. The ranking system covers 210 categories of websites and apps in 190 countries and was designed to be an estimate of a website's popularity & growth potential. The company ranks websites based on traffic and engagement data, and ranks apps in the App Store (iOS/iPadOS) and Google Play Store based on installs & active user data. Analytics from SimilarWeb are comparable (albeit usually lower) than from Google Analytics. Acquisitions On December 10, 2015, Similarweb announced it had acquired Quettra, a Silicon Valley-based mobile intelligence startup, to boost its mobile operations. In November 2021, Similarweb acquired "Embee" to extend its mobile user data sets. In May 2022, Similarweb acquired "RankRanger" to extend its offering to the SEO industry. Rank Ranger provides keyword rank tracking services and advanced API's that will be added to Similarweb's existing SEO tools to create a more comprehensive suite. See also List of most visited websites List of search engines List of web directories References External links Analytics companies Companies listed on the New York Stock Exchange Web analytics Websites Lists of websites Mobile applications Lists of mobile apps Digital marketing companies of Israel Technology companies established in 2009