Or Offer

Co-Founder, CEO and Director

Or has been the CEO of Similarweb since the company’s founding in 2007. Under his leadership, the company has grown from a small Israeli startup to a global business with over 850 employees, 9 offices and thousands of paying customers. Or was also a founding partner at AfterDownload (acquired by IronSource), and is an active investor in a number of startups. Or has been selected as one of the top 100 influencers in the Israeli high tech scene and 40 under 40 most promising young people by TheMarker.

Joshua Alliance


Joshua Alliance has served as a member of our board of directors since October 2011. Mr. Alliance also serves as a Non-Executive director of N Brown Group plc as well as a member of the board of directors of a number of private companies, including SparkBeyond, PetsPyjamas, Woo.io and Moon Active. He has previously served as a board member of Spot.IM, where he served from June 2012 to June 2018, and WorkAngel Technology, where he served from November 2012 to its sale in July 2017. He served as Head of Innovation of N Brown Group plc from May 2015 through November 2020. Mr. Alliance received his bachelors at The University of Manchester.

Sanju Bansal


Sanju Bansal is CEO of Hunch Analytics, a company dedicated to harvesting newly available data sources in healthcare and education to improve provider efficiency and consumer outcomes. He also serves as a member of the board of directors of several companies, including Everquote (NASDAQ: EVER), a leading online insurance marketplace, Cvent, a cloud-based event management software provider, and Clarabridge, a customer experience technology company.

Bansal formerly co-founded MicroStrategy (NASDAQ: MSTR), a worldwide provider of enterprise software platforms for business intelligence, mobile software, big data and cloud-based services. He served as MicroStrategy’s vice chairman and executive vice president until 2013, having been chief operating officer the previous 19 years.

Bansal holds a B.S. in electrical engineering from MIT and an M.S. in computer science from Johns Hopkins University.

Harel Beit-On


Harel Beit-On has served as a member of our board of directors since June 2017. Mr. Beit-On is one of the co-founders of the Viola Group, which he co-founded in 2000, and is one of the original cofounders of Viola Ventures and the Founder of Viola Growth, where he serves as General Partner. Mr. Beit-On previously served as the Chief Executive Officer, President & Chairman of Tecnomatix, a leading provider of complete enterprise software solutions for process management and collaboration, where he led the company from 1994 to 2005. In 2005, he led the successful sale of Tecnomatix to UGS, a global leader in the Product Lifecycle Management, for $228 million. Mr. Beit-On serves as the Chairman of the Board of Gaon Group and Gaon Holdings and has served in this role since 2013. He also serves as a board member of Playbuzz (ex.co), which he joined in October 2017, Behalf, which he joined in September 2016, and Cyberint, which he joined in June 2018. Mr. Beit-On previously served as Chairman of the Board of ECtel from 2004 to 2006, Chairman of the Board of Matomy from January 2017 to June 2018 and Chairman of the Board of Lumenis, Israel’s largest medical device company from 2007 to 2015, where he led a $150 million investment and led the company’s turnaround eventually resulting in its sale to XIO Group for $510 million in 2015. Mr. Beit-On received his B.A. in Economics from The Hebrew University of Jerusalem, where he presently serves as Chairman of the Board, and an MBA from the MIT Sloan School of Management. Mr. Beit-On is a seasoned executive with over 30 years of management leadership in the IT industry and an extensive investment and exit record.

Joe Del Preto


Mr. Del Preto has served as Chief Financial Officer and Treasurer of publicly traded Sprout Social (NASDAQ: SPT) since July 2017. Prior to Sprout Social, Mr. Del Preto was the Global Controller for Groupon, Inc. and served as Vice President of Finance of Echo Global Logistics Inc. Mr. Del Preto began his career at PricewaterhouseCoopers LLP. He holds a Bachelor’s degree in Accounting from the University of Indiana, Bloomington, and is a Certified Public Accountant.

Russell Dreisenstock


Russell Dreisenstock has served as a member of our board of directors since March 2017. Since July 2016, Mr. Dreisenstock has served as the Head of International Investments at Naspers Ventures, partnering with entrepreneurs to build leading technology companies in high-growth markets. Mr. Dreisenstock has also served as a member of the board of directors of Movile Mobile Commerce Holdings, a platform for development of mobile content and commerce in Latin America, from September 2016 to September 2017. Mr. Dreisenstock received his CA (SA) in B.Compt. with Honors from the University of South Africa. We believe Mr. Dreisenstock is qualified to serve on our board of directors because of his experience advising companies and founders to build global technology companies.

Tzipi Ozer-Armon


Since 2012, Ms. Ozer-Armon has served as the CEO of Lumenis, a global leader in the field of minimally-invasive clinical solutions for the surgical, ophthalmologic, and aesthetic markets. During her tenure, she has led Lumenis through a comprehensive growth and profitability turnaround, including an IPO on the NASDAQ in 2014 and successful acquisitions in 2015 and in 2020. Before joining Lumenis, Ms. Ozer-Armon headed the Japanese market activities of Teva Pharmaceutical Industries Ltd. Prior to that, Ms. Ozer-Armon served as Senior Vice President of Sales and Marketing at SanDisk, holding multi-billion dollars sales responsibility. She also served as VP & General Manager of MSystems, and as VP of Corporate Development at Comverse. Her career also includes four years at ATKearney, a Global Management Consulting company based in London.

Ms. Ozer-Armon holds a BA magna cum laude in Economics from Tel Aviv University, an MBA majoring in Finance and Marketing, and is an AMP graduate of the Harvard Business School.