Exhibit 99.1 SIMILARWEB ANNOUNCES FOURTH QUARTER 2022 RESULTS Fourth quarter 2022 revenue grew 28% year-over-year to $51.3 million Non-GAAP operating margin improved by 25 percentage points Annual Recurring Revenue Exceeds$200 Million TEL AVIV, ISRAEL -- February 14, 2023 -- Similarweb Ltd. (NYSE: SMWB) ("Similarweb" or the "Company"), a leading digital intelligence company, today announced financial results for its fourth quarter ended December 31, 2022. The Company published a letter to shareholders from ...