Or Offer founded SimilarWeb with Nir Cohen on March 3, 2009 in Tel-Aviv, Israel. Later the company moved its headquarters to London, U.K. On May 31, 2010 the company raised $1.1 million in a series A roundof investment led by Yossi Vardi, International Management, Liron Rose and Omer Kaplan. On January 29-th, 2013 company raised another $2.5and closed an additional $3.5million extension to its Series B round on September 24th led by David Alliance, Moshe Lichtman and participation of existing investor Docor International Management.On the 24th of February 2014 South Africa media giant Naspers invested $18million of funding in a Series C into SimilarWeb. Less than a month after SimilarWeb used a part of the capital for acquisition of Israeli early-stage company TapDogfor a few million dollars in shares and cash, less than a year after it was founded. Company's most notable clients include PayPal, eBay Inc., Flipkart, Adidas and others.