#11&DIBS Investor Presentation#2We are devoted treasure hunters#3We are champions of design#4We are passionate sellers and gifted artisans#5We enrich lives with extraordinary design#6Disclaimer 1stdibs.com, Inc. ("1stDibs," "we," "us," or the "Company") has filed a registration statement (including a preliminary prospectus) on Form S-1 (File No. 333-256188) with the SEC for the offering to which this presentation relates. The registration statement has not yet become effective. Securities may not be sold, nor may offers to buy be accepted, prior to the time the registration statement becomes effective. Before you invest, you should read the preliminary prospectus in that registration statement and the other documents we have filed with the Securities and Exchange Commission (the "SEC") for more complete information about us and this offering. You may obtain these documents for free by visiting the SEC's website at www.sec.gov. Alternatively, copies of the preliminary prospectus may be obtained from BofA Securities, Attn: Prospectus Department, NC1-004-03-43, 200 North College Street, 3rd floor, Charlotte, North Carolina, 28255-0001, by email at [email protected]; or from Barclays Capital Inc. c/o Broadridge Financial Solutions, Attention: Prospectus Department, 1155 Long Island Avenue, Edgewood, NY 11717, by telephone at 888-603-5847, or by email at [email protected]. This presentation shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. Any offers, solicitations or offers to buy, or any sales of securities will be made in accordance with the registration requirements of the Securities Act of 1933, as amended. This presentation may not be reproduced, forwarded, distributed, or disclosed in whole or in part. This presentation has been prepared for informational purposes only and not for any other purpose. Nothing contained in this presentation is, or should be construed as, a recommendation, promise, or representation by the presenter or the Company or any director, employee, agent, or adviser of the Company. This presentation does not purport to be all-inclusive or to contain all of the information you may desire. This presentation includes statistical and other industry and market data obtained from industry publications and research, surveys, studies and other similar third-party sources, as well as the Company's estimates based on such data. All of the market data and estimates used in this presentation involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such data and estimates. We believe that the information from these third-party sources is reliable; however, we have not independently verified them. Further, the Company's business and the industry in which it operates is subject to a high degree of risk and uncertainty, which could cause results to differ materially from those expressed in the estimates made by the third-party sources and by us. All third-party brand names and logos appearing in this presentation are trademarks or registered trademarks of their respective holders. Any such appearance does not necessarily imply any affiliation with or endorsement of the Company. This presentation contains forward-looking statements that involve substantial risks and uncertainties. Any statements contained in this presentation that are not statements of historical facts may be deemed to be forward-looking statements. In some cases, you can identify forward-looking statements by the words "may," "might," "will," "can," "could," "would," "should," "expect," "intend," "plan," "objective," "target," "anticipate," "believe," "estimate," "predict," "project," "potential," "continue," "target," "goal," and "ongoing," or the negative of these terms, or other comparable terminology intended to identify statements about the future. These statements involve known and unknown risks, uncertainties, and other factors that may cause our actual results, performance, or achievements to be materially different from the information expressed or implied by these forward-looking statements. Forward-looking statements include, but are not limited to, statements about: our future financial performance and business model, including our expectations regarding our net revenue, cost of revenue, operating expenses, our long-term targets, and our ability to achieve and maintain future profitability, benefits of our capex light business model; our buyer unit economics; our growth drivers and expectations as to future growth and our ability to manage growth; our key metrics; our cohort data; our strategies, plans, objectives, and goals; market opportunity and market demand for the products offered on our online marketplace and for online purchases of luxury design products generally; our ability to compete, scale our operations, attract and retain sellers and buyers, expand in our existing verticals and into adjacent verticals, increase our GMV and seller stock value, and expand our business within the U.S. and abroad; economic and industry trends, projected growth, or trend analysis; our estimated market opportunity, and the effect of the COVID-19 pandemic on our business and operations. You should not rely upon forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance, or events and circumstances reflected in the forward-looking statements will be achieved or occur. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of the forward-looking statements. Such forward-looking statements relate only to events as of the date of this presentation. We undertake no obligation to update any forward-looking statements for any reason after the date of this presentation to conform these statements to actual results or to changes in our expectations. In addition to financial information presented in accordance with GAAP, this presentation includes adjusted EBITDA, which is a non-GAAP financial measure. These non-GAAP financial measures are presented for supplemental informational purposes only and should not be considered as a substitute for or in isolation from financial information presented in accordance with GAAP. These non-GAAP metrics have limitations as analytical tools. A reconciliation of adjusted EBITDA to net loss, the most directly comparable GAAP financial measure, is included in the Appendix to this presentation.#7OFFERING SIZE FILING RANGE OPTION TO PURCHASE ADDITIONAL SHARES EXCHANGE/TICKER EXPECTED PRICING DATE USE OF PROCEEDS LOCK UP / MARKET STANDOFF LEAD BOOKRUNNERS CO-MANAGERS 5,750,000 shares / $112,125,000 (assuming midpoint of price range) | 100% primary $18-$21 The Offering 15% | 100% primary Nasdaq / "DIBS" June 9th General corporate purposes, including working capital, sales and marketing activities, technology development, general and administrative matters and capital expenditures 25% @ 90 days if stock is up 33% from IPO price and at least one earnings release or 10-Q filed, remainder @ earlier of 180 days/3 trading days post second quarterly earnings release post IPO BofA Securities, Barclays, Allen & Company LLC, Evercore ISI William Blair, Raymond James, JMP Securities#8Company Overview#9BURNO www VI David Rosenblatt Chief Executive Officer#10Our Mission To enrich lives with extraordinary design