Exhibit 99.1

Similarweb Names Tamar Rapaport-Dagim to its Board of Directors

TEL AVIV, Israel (August 28, 2025) — Similarweb, a leading digital market intelligence company, welcomed Tamar Rapaport-Dagim to its Board of Directors today, following her election with overwhelming support at Similarweb’s annual general meeting of shareholders.

Tamar Rapaport-Dagim is Chief Financial Officer and Chief Operating Officer of Amdocs (NASDAQ: DOX).

“As a leader at Amdocs, which provides software and services for communications, media, and financial services companies, Tamar knows the power of the web, apps, and digital media to transform business,” said Or Offer, Similarweb CEO and co-founder. “We look forward to benefiting from her strategic guidance on Similarweb’s continued success.”

Tamar Rapaport-Dagim was appointed Amdocs’ Chief Financial Officer in 2007 and Chief Operating Officer in 2018, having joined Amdocs as Vice President of Finance in 2004. Prior to Amdocs, she was the Chief Financial Officer of Emblaze, a provider of multimedia solutions over wireless and IP networks, and has also served as controller of Teledata Networks and held various finance management positions in public accounting. She holds an MBA, as well as a Bachelor’s degree in accounting and economics from Tel Aviv University, and is a certified public accountant.

About Similarweb

Similarweb powers businesses to win their markets with Digital Data. By providing essential web and app data, analytics, and insights, we empower our users to discover business opportunities, identify competitive threats, optimize strategy, acquire the right customers, and increase monetization. Similarweb products are integrated into users’ workflow, powered by advanced technology, and based on leading comprehensive Digital Data.

Press:

David F. Carr

Similarweb

david.carr@similarweb.com

Investors:

Rami Myerson

Similarweb

rami.myerson@similarweb.com

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