Exhibit 99.1

SIMILARWEB ANNOUNCES FIRST QUARTER 2023 RESULTS
First quarter 2023 revenue grew 19% year-over-year to $52.8 million
Non-GAAP operating margin improved by 31 percentage points

TEL AVIV, ISRAEL -- May 9, 2023 -- Similarweb Ltd. (NYSE: SMWB) ("Similarweb" or the "Company"), a leading digital data and analytics company powering critical business decisions, today announced financial results for its first quarter ended March 31, 2023. The Company published a letter to shareholders from management discussing these results, which can be accessed at the link: https://ir.similarweb.com/financials/quarterly-results, located on the Company's investor relations website.
“We continued to improve our operating efficiency and navigate through a challenging demand environment in the first quarter,” said Or Offer, Founder and CEO of Similarweb. “We expanded our operating margin significantly compared to last year at this time due to our focus on aligning our resources with our growth trajectory. Despite longer sales cycles, we were able to win new customers, and retain many existing customers who assess our data as critical to their success.” Offer continued, “Our customers tell us that our data and actionable insights are essential to make the right decisions.”

First Quarter 2023 Financial Highlights
•Total revenue was $52.8 million, an increase of 19% compared to $44.3 million for the first quarter of 2022.
•GAAP operating loss was $(13.1) million or (25)% of revenue, compared to $(26.2) million or (59)% of revenue for the first quarter of 2022.
•GAAP net loss per share was $(0.15), compared to $(0.34) for the first quarter of 2022.
•Non-GAAP operating loss was $(7.2) million or (14)% of revenue, compared to $(19.8) million or (45)% of revenue for the first quarter of 2022.
•Non-GAAP operating loss per share was $(0.09), compared to $(0.26) for the first quarter of 2022.

Exhibit 99.1
•Cash and cash equivalents totaled $75.3 million as of March 31, 2023, compared to $77.8 million as of December 31, 2022.
•Net cash provided by operating activities was $0.3 million, compared to $0.9 million for the first quarter of 2022.
•Free cash flow was $(1.2) million, compared to $(4.3) million for the first quarter of 2022.
•Normalized free cash flow was $(0.6) million, compared to $(4.0) million for the first quarter of 2022.
Recent Business Highlights
•Grew number of customers to 4,179 as of March 31, 2023, an increase of 14% compared to March 31, 2022.
•Grew average annual revenue per customer to approximately $51,300 in the first quarter of 2023, an increase of 4% compared to the first quarter of 2022.
•Grew number of customers with ARR of $100,000 or more to 344, an increase of 16% compared to March 31, 2022.
•Customers with ARR of $100,000 or more contributed 55% of the total ARR as of March 31, 2023, compared to 53% as of March 31, 2022.
•Dollar-based net retention rate for customers with ARR of $100,000 or more was 114% in the first quarter of 2023 as compared to 127% in the first quarter of 2022.
•Overall dollar-based net retention rate was 105% in the first quarter of 2023 as compared to 115% in the first quarter of 2022.
•Multi-year subscriptions now comprise 40% of our overall ARR as of March 31, 2023, as compared to 35% as of March 31, 2022.
•Remaining performance obligations increased 9% year-over-year, to $174.0 million as of March 31, 2023, as compared to $159.1 million as of March 31, 2022.


Exhibit 99.1
Financial Outlook
“Our first quarter results, especially in our improved operating margin, show progress towards our objective of achieving sustained positive free cash flow quarterly by the fourth quarter of 2023,” said Jason Schwartz, Chief Financial Officer of Similarweb. “We continue to focus on disciplined execution and cost effectiveness in this challenging environment that we believe will be critical to accomplishing our objectives in 2023.”
•Q2 2023 Guidance
◦Total revenue estimated between $53.3 million and $53.8 million, representing approximately 13% growth year over year at the mid-point of the range.
◦Non-GAAP operating loss estimated between $(6.5) million and $(7.0) million.
•FY 2023 Guidance
◦Total revenue estimated between $221.0 million and $222.0 million, representing approximately 15% growth year over year at the mid-point of the range.
◦Non-GAAP operating loss estimated between $(21.0) million and $(22.0) million.
◦We expect to reach sustained positive free cash flow in the fourth quarter of 2023. Our free cash flow may fluctuate seasonally as we progress through this year.

The Company’s second quarter and full year 2023 financial outlook is based upon a number of assumptions that are subject to change and many of which are outside the Company’s control. Actual results may vary from these assumptions, and the Company’s expectations may change. There can be no assurance that the Company will achieve these results.
The Company does not provide guidance for operating loss and gross margin, the most directly comparable GAAP measures to non-GAAP operating loss and non-GAAP gross margin, respectively, and similarly cannot provide a reconciliation to these measures to their closest GAAP equivalents without unreasonable effort due to the unavailability of reliable estimates for certain items. These items are not within the Company’s control and may vary greatly between periods and could significantly impact future financial results.


Exhibit 99.1
Conference Call Information
The financial results and business highlights will be discussed on a conference call and webcast scheduled at 8:30 a.m. Eastern Time on Wednesday, May 10, 2023. A live webcast of the call can be accessed from Similarweb’s Investor Relations website at https://ir.similarweb.com. An archived webcast of the conference call will also be made available on the Similarweb website following the call. The live call may also be accessed via telephone at (877) 407-0726 toll-free and at (201) 689-7806 internationally.

About Similarweb: As a trusted platform for understanding online behavior, millions of people rely on Similarweb Digital Data and insights to strengthen their knowledge of the digital world. We empower anyone — from the curious individual to the enterprise business leader — to make smarter decisions by understanding why things happen across the digital ecosystem.

Forward-Looking Statements
This press release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, or the Securities Act, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements relating to our guidance for the second quarter and full year of 2023 described under "Financial Outlook". Forward-looking statements include all statements that are not historical facts. Such statements may be preceded by the words “intends,” “may,” “will,” “plans,” “expects,” “anticipates,” “projects,” “predicts,” “estimates,” “aims,” “believes,” “hopes,” “potential” or similar words. These forward-looking statements reflect our current views regarding our intentions, products, services, plans, expectations, strategies and prospects, which are based on information currently available to us and assumptions we have made. Actual results may differ materially from those described in such forward-looking statements and are subject to a number of known and unknown risks, uncertainties, other factors and assumptions that are beyond our control. Such risks and uncertainties include, without limitation, risks and uncertainties associated with: (i) our expectations regarding our revenue, expenses and other operating results; (ii) our ability to acquire new customers and successfully retain existing customers; (iii) our ability to increase usage of our solutions and upsell and cross-sell additional solutions; (iv) our ability to achieve or sustain profitability; (v) anticipated trends, growth rates, rising interest rates, rising global inflation and current macroeconomic conditions, and challenges in our business and in the markets in which we operate; (vi) future investments in our business, our anticipated capital expenditures and our estimates regarding our capital requirements; (vii) the costs and success of our sales and marketing efforts and our ability to promote our brand; (viii) our reliance on key personnel and our ability to identify, recruit and retain skilled personnel; (ix) our ability to effectively manage our growth, including continued international expansion; (x) our reliance on certain third party platforms and sources for the collection of data necessary for our solutions; (xi) our

Exhibit 99.1
ability to protect our intellectual property rights and any costs associated therewith; (xii) our ability to identify and complete acquisitions that complement and expand our reach and platform; (xiii) our ability to comply or remain in compliance with laws and regulations that currently apply or become applicable to our business, including in Israel, the United States, the European Union, the United Kingdom and other jurisdictions where we elect to do business; (xiv) our ability to compete effectively with existing competitors and new market entrants; and (xv) the growth rates of the markets in which we compete.

These risks and uncertainties are more fully described in our filings with the Securities and Exchange Commission, including in the section entitled “Risk Factors” in our Form 20-F filed with the Securities and Exchange Commission on March 23, 2023, and subsequent reports that we file with the Securities and Exchange Commission. Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties and assumptions, we cannot guarantee future results, levels of activity, performance, achievements, or events and circumstances reflected in the forward-looking statements will occur.

Forward-looking statements represent our beliefs and assumptions only as of the date of this press release. Except as required by law, we undertake no duty to update any forward-looking statements contained in this release as a result of new information, future events, changes in expectations or otherwise.




Exhibit 99.1
Non-GAAP Financial Measures
This press release contains certain financial measures that are expressed on a non-GAAP basis. We use these non-GAAP financial measures internally to facilitate analysis of our financial and business trends and for internal planning and forecasting purposes. We believe these non-GAAP financial measures, when taken collectively, may be helpful to investors because they provide consistency and comparability with past financial performance by excluding certain items that may not be indicative of our business, results of operations, or outlook. However, non-GAAP financial measures have limitations as an analytical tool and are presented for supplemental informational purposes only. They should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. Free cash flow represents net cash provided by (used in) operating activities less capital expenditures and capitalized internal-use software costs. Normalized free cash flow represents free cash flow less capital investments related to the Company's new headquarters, payments received in connection with these capital investments and deferred payments related to business combinations. Non-GAAP operating income (loss), non-GAAP gross profit, non-GAAP gross margin, non-GAAP operating margin, non-GAAP research and development expenses, non-GAAP sales and marketing expenses and non-GAAP general and administrative expenses represent the comparable GAAP financial figure operating income (loss) or expense, less share-based compensation, adjustments and payments related to business combinations, amortization of intangible assets and certain other non-recurring items, as applicable and indicated in the above tables.

Other Metrics
Customer acquisition costs (CAC) represent the portion of sales and marketing expenses allocated to acquire new customers. Customer retention costs (CRC) represent the portion of sales and marketing expenses allocated to retain existing customers and to increase existing customers’ subscriptions. Annual recurring revenue (ARR) represents the annualized subscription revenue we would contractually expect to receive from customers assuming no increases or reductions in their subscriptions. CAC payback period is the estimated time in months to recover CAC in terms of incremental gross profit that newly acquired customers generate. Net retention rate (NRR) represents the comparison of our ARR from the same set of customers as of a certain point in time, relative to the same point in time in the previous year ago period, expressed as a percentage.


Exhibit 99.1


Press Contact:
David Carr
Similarweb
press@similarweb.com

Investor Contact:
Raymond "RJ" Jones
Similarweb
raymond.jones@similarweb.com

Exhibit 99.1
Similarweb Ltd.
Consolidated Balance Sheets
U.S. dollars in thousands (except share and per share data)
December 31,March 31,
20222023
(Unaudited)
Assets
Current assets:
Cash and cash equivalents$77,810 $75,349 
Restricted deposits9,814 9,858 
Accounts receivable, net38,141 37,497 
Deferred contract costs9,789 9,365 
Prepaid expenses and other current assets6,628 5,023 
Total current assets142,182 137,092 
Property and equipment, net31,823 31,904 
Deferred contract costs, non-current8,348 7,323 
Operating lease right-of-use assets40,823 39,126 
Intangible assets, net9,561 8,359 
Goodwill12,867 12,868 
Other non-current assets441 10 
Total assets$246,045 $236,682 
Liabilities and Shareholders' equity
Current liabilities:
Borrowings under Credit Facility$25,000 $25,000 
Accounts payable7,144 6,089 
Payroll and benefit related liabilities18,512 16,355 
Deferred revenue93,195 100,933 
Other payables and accrued expenses27,990 23,906 
Operating lease liabilities9,091 8,408 
Total current liabilities180,932 180,691 
Deferred revenue, non-current974 479 
Operating lease liabilities, non-current40,075 37,836 
Other long-term liabilities2,113 2,019 
Total liabilities224,094 221,025 
Shareholders' equity
 Ordinary Shares, NIS 0.01 par value 500,000,000 shares authorized as of December 31, 2022 and March 31, 2023 (unaudited), 76,435,940 and 77,234,752 shares issued as of December 31, 2022 and March 31, 2023 (unaudited), 76,433,772 and 77,232,584 outstanding as of December 31, 2022 and March 31, 2023 (unaudited), respectively;
210 212 
Additional paid-in capital345,834 351,649 
Accumulated other comprehensive income (loss)(367)(644)
Accumulated deficit(323,726)(335,560)
Total shareholders' equity21,951 15,657 
Total liabilities and shareholders' equity$246,045 236,682 
    

Exhibit 99.1
Similarweb Ltd.
Consolidated Statements of Comprehensive Income (Loss)
U.S. dollars in thousands (except share and per share data)


Three Months Ended March 31,
20222023
(Unaudited)
Revenue$44,280 $52,750 
Cost of revenue13,095 12,076 
Gross profit31,185 40,674 
Operating expenses:
Research and development14,713 14,351 
Sales and marketing30,342 28,666 
General and administrative12,311 10,737 
Total operating expenses57,366 53,754 
Loss from operations(26,181)(13,080)
Finance income, net822 1,355 
Loss before income taxes(25,359)(11,725)
Provision for income taxes250 109 
Net loss$(25,609)$(11,834)
Net loss per share attributable to ordinary shareholders, basic and diluted$(0.34)$(0.15)
Weighted-average shares used in computing net loss per share attributable to ordinary shareholders, basic and diluted75,035,966 76,862,020 
Net loss(25,609)(11,834)
Other comprehensive income (loss), net of tax
Change in unrealized gain (loss) on cashflow hedges86 (277)
Total other comprehensive income (loss), net of tax86 (277)
Total comprehensive loss$(25,523)$(12,111)

Exhibit 99.1
Share-based compensation costs included above:
U.S. dollars in thousands
Three Months Ended March 31,
20222023
(Unaudited)
Cost of revenue$146 $155 
Research and development1,209 1,390 
Sales and marketing1,373 1,374 
General and administrative1,075 1,490 
Total$3,803 $4,409 

Exhibit 99.1
Similarweb Ltd.
Consolidated Statements of Cash Flows
U.S. dollars in thousands
Three Months Ended March 31,
20222023
(Unaudited)
Cash flows from operating activities:
Net loss$(25,609)$(11,834)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization3,049 2,540 
Finance expense231 207 
Unrealized loss (gain) from hedging future transactions4 (27)
Share-based compensation3,803 4,409 
Loss from sale of equipment— 2 
Changes in operating assets and liabilities:
Change in operating lease right-of-use assets and liabilities, net3,177 (1,225)
Decrease in accounts receivable, net486 644 
(Increase) decrease in deferred contract costs(1,767)1,449 
Decrease in other current assets1,104 250 
Decrease in other non-current assets— 431 
Increase (decrease) in accounts payable1,494 (1,059)
Increase in deferred revenue12,518 7,243 
Decrease in other non-current liabilities(62)(94)
Increase (decrease) in other liabilities and accrued expenses2,486 (2,610)
Net cash provided by operating activities914 326 
Cash flows from investing activities:
Purchase of property and equipment, net(4,784)(1,132)
Capitalized internal-use software costs(380)(433)
Decrease (increase) in restricted deposits12 (44)
Net cash used in investing activities(5,152)(1,609)
Cash flows from financing activities:
Proceeds from exercise of stock options609 1,392 
Payments of contingent consideration, net— (2,363)
Net cash provided by (used in) financing activities609 (971)
Effect of exchange rates on cash and cash equivalents(231)(207)
Net decrease in cash and cash equivalents(3,860)(2,461)
Cash and cash equivalents, beginning of period128,879 77,810 
Cash and cash equivalents, end of period$125,019 $75,349 
Supplemental disclosure of cash flow information:
Interest (received) paid, net$(17)$6 
Taxes paid$60 $55 

Exhibit 99.1
Supplemental disclosure of non-cash financing activities:
Additions to operating lease right-of-use assets and liabilities$4,279 $170 
Deferred proceeds from exercise of share options included in other current assets$479 $16 
Deferred costs of property and equipment incurred during the period included in accounts payable$10,542 $121 
Deferred payments in relation to business combinations held in escrow$— $1,269 


Exhibit 99.1

Reconciliation of Non-GAAP Financial Measures to the Most Directly Comparable GAAP Financial Measures


Reconciliation of GAAP gross profit to non-GAAP gross profit

Three Months Ended March 31,
20222023
(In thousands)
GAAP gross profit$31,185 $40,674 
Add:
Share-based compensation expenses146 155 
Retention payments related to business combinations690 88 
Amortization of intangible assets related to business combinations1,041 1,168 
Non-recurring expenses related to termination of lease agreement and others9 — 
Non-GAAP gross profit$33,071 $42,085 
Non-GAAP gross margin75 %80 %

Reconciliation of Loss from operations (GAAP) to Non-GAAP operating loss
Three Months Ended March 31,
20222023
(In thousands)
Loss from operations$(26,181)$(13,080)
Add:
Share-based compensation expenses3,803 4,409 
Retention payments related to business combinations712 282 
Amortization of intangible assets related to business combinations1,041 1,202 
Adjustment of fair value of contingent consideration related to business combinations552 — 
Non-recurring expenses related to termination of lease agreement and others318 13 
Non-GAAP operating loss$(19,755)$(7,174)
Non-GAAP operating margin(45)%(14)%


Exhibit 99.1
Reconciliation of GAAP operating expenses to non-GAAP operating expenses
Three Months Ended March 31,
20222023
(In thousands)
GAAP research and development$14,713 $14,351 
Less:
Share-based compensation expenses1,209 1,390 
Non-recurring expenses related to termination of lease agreement and others23 — 
Non-GAAP research and development$13,481 $12,961 
Non-GAAP research and development margin30 %25 %
GAAP sales and marketing$30,342 $28,666 
Less:
Share-based compensation expenses1,373 1,374 
Retention payments related to business combinations22 194 
Amortization of intangible assets related to business combinations— 34 
Non-recurring expenses related to termination of lease agreement and others271 13 
Non-GAAP sales and marketing$28,676 $27,051 
Non-GAAP sales and marketing margin65 %51 %
GAAP general and administrative$12,311 $10,737 
Less:
Share-based compensation expenses1,075 1,490 
Adjustment of fair value of contingent consideration related to business combinations552 — 
Non-recurring expenses related to termination of lease agreement and others15 — 
Non-GAAP general and administrative$10,669 $9,247 
Non-GAAP general and administrative margin24 %18 %


Exhibit 99.1
Reconciliation of Net cash provided by operating activities (GAAP) to Free cash flow and normalized free cash flow
Three Months Ended March 31,
20222023
(In thousands)
Net cash provided by operating activities$914 $326 
Purchases of property and equipment, net(4,784)(1,132)
Capitalized internal use software costs(380)(433)
Free cash flow$(4,250)$(1,239)
Purchases of property and equipment related to the new headquarters4,456 1,048 
Payments received in connection with purchases of property and equipment(4,169)— 
Payments received from escrow in relation to contingent consideration— (380)
Normalized free cash flow$(3,963)$(571)