Exhibit 99.1

Marin Software Announces First Quarter 2018 Financial Results

San Francisco, CA (May 10, 2018) – Marin Software Incorporated (NYSE: MRIN), a leading provider of cross-channel, cross-device, enterprise marketing software for advertisers and agencies, today announced financial results for the first quarter ended March 31, 2018.

“Our growth in cross-channel revenue during Q1 demonstrates the appeal for an open, independent approach to digital advertising,” said Chris Lien, Chief Executive Officer of Marin Software. “Our new platform, which launches this summer, will help advertisers drive performance in a world where Google, Facebook and increasingly Amazon, dominate.”

First Quarter 2018 Business and Product Release Highlights:

First Quarter 2018 Financial Updates:

Reconciliations of GAAP to non-GAAP financial measures have been provided in the financial statement tables included in this press release. An explanation of these measures is also included below, under the heading "Non-GAAP Financial Measures."

Financial Outlook:

Marin is providing guidance for its second quarter of 2018 as follows:

Non-GAAP loss from operations excludes the effects of stock-based compensation, amortization of internally developed software, intangible assets and deferred costs to obtain and fulfill contracts, impairment of goodwill and long-lived assets, non-recurring costs associated with restructurings, capitalization of internally developed software and deferral of costs to obtain and fulfill contracts.

Additionally, the Company does not reconcile its forward-looking non-GAAP loss from operations, due to variability between revenues and non-cash items such as stock-based compensation. The GAAP loss from operations includes stock-based compensation expense, which is affected by hiring and retention needs, as well as the future price of Marin’s stock. As a result, a reconciliation of the forward-looking non-GAAP financial measures to the corresponding GAAP measures cannot be made without unreasonable effort.

Quarterly Results Conference Call

Marin Software will host a conference call today at 2:00 PM Pacific Time (5:00 PM Eastern Time) to review the Company’s financial results for the quarter ended March 31, 2018, and its outlook for the future. To access the call, please dial (877) 705-6003 in the United States or (201) 493-6725 internationally with reference to the company name and conference title. A live webcast of the conference call will be accessible at http://public.viavid.com/index.php?id=129324. Following the completion of the call through 11:59 p.m. Eastern Time on May 17, 2018, a recorded replay will be available for replay on the Company’s website at: http://investor.marinsoftware.com/ and a telephone replay will be available by dialing (844) 512-2921 in the United States or (412) 317-6671 internationally with the recording access code 13678855.

About Marin Software

Marin Software Incorporated’s (NYSE: MRIN) mission is to give advertisers the power to drive higher efficiency, effectiveness, and transparency in their paid marketing programs that run on the world’s largest publishers. Marin provides industry leading enterprise marketing software for advertisers and agencies to measure, manage, and optimize billions of dollars in annualized ad spend across the web and mobile devices. Offering a SaaS advertising management platform for search, social, and display advertising, Marin helps digital marketers improve financial performance, save time, and make better decisions. Advertisers use Marin to create, target, and convert precise audiences based on recent buying signals from users’ search, social, and display interactions. Headquartered in San Francisco, with offices in eight countries, Marin’s technology powers marketing campaigns around the globe. For more information about Marin Software, please visit: http://www.marinsoftware.com.

Non-GAAP Financial Measures

Marin uses certain non-GAAP financial measures in this release. Marin uses these non-GAAP financial measures internally in analyzing its financial results and believes they are useful to investors, as a supplement to GAAP measures, in evaluating its ongoing operational performance. Marin believes that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating ongoing operating results and trends and in comparing our financial results with other companies in our industry, many of which present similar non-GAAP financial measures to investors. Non-GAAP financial measures that Marin uses may differ from measures that other companies may use.

Non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. A reconciliation of the non-GAAP financial measures to their most directly comparable GAAP measures has been provided in the financial statement tables included below in this press release. Investors are encouraged to review the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measures.

Non-GAAP expenses, measures and net loss per share. Marin defines non-GAAP sales and marketing, non-GAAP research and development, non-GAAP general and administrative, non-GAAP gross profit, non-GAAP operating loss and non-GAAP net loss as the respective GAAP balances, adjusted for stock-based compensation, amortization of internally developed software, intangible assets and deferred costs to obtain and fulfill contracts, impairment of goodwill and long-lived assets, non-cash expenses related to debt agreements, non-recurring costs associated with restructurings, capitalization of internally developed software and deferral of costs to obtain and fulfill contracts. Non-GAAP net loss per share is calculated as non-GAAP net loss divided by the weighted average shares outstanding.

Adjusted EBITDA. Marin defines Adjusted EBITDA as net loss, adjusted for stock-based compensation expense, depreciation, amortization of internally developed software, intangible assets and deferred costs to obtain and fulfill contracts, capitalization of internally developed software, deferral of costs to obtain and fulfill contracts, impairment of goodwill and long-lived assets, provision for income taxes, other income or expenses, net and non-recurring costs associated with restructurings. These amounts are often excluded by other companies to help investors understand the operational performance of their business. The Company uses Adjusted EBITDA as a measurement of its operating performance because it assists in comparing the operating performance on a consistent basis by removing the impact of certain non-cash and non-operating items. Adjusted EBITDA reflects an additional way of viewing aspects of the operations that Marin believes, when viewed with the GAAP results and the accompanying reconciliations to corresponding GAAP financial measures, provide a more complete understanding of factors and trends affecting its business.

Forward-Looking Statements

This press release contains forward-looking statements including, among other things, statements regarding Marin’s business, expectations about our ability to return to growth, impact of investments in product and technology on future operating results, progress on product development efforts, product capabilities and future financial results, including its outlook for the second quarter of 2018. These forward-looking statements are subject to the safe harbor provisions created by the Private Securities Litigation Reform Act of 1995. Actual results could differ materially from those projected in the forward-looking statements as a result of certain risk factors, including but not limited to our ability to grow sales to new and existing customers; our ability to expand our sales and marketing capabilities; our ability to retain and attract qualified management and technical personnel; delays in the release of updates to our product platform or new features; competitive factors, including but not limited to pricing pressures, entry of new competitors and new applications; quarterly fluctuations in our operating results due to a number of factors; inability to adequately forecast our future revenues, expenses, Adjusted EBITDA, cash flows or other financial metrics; delays, reductions or slower growth in the amount spent on online and mobile advertising and the development of the market for cloud-based software; progress in our efforts to update our software platform; adverse changes in our relationships with and access to publishers and advertising agencies; level of usage and advertising spend managed on our platform; our ability to expand sales of our solutions in channels other than search advertising; any slow-down in the search advertising market generally; shift in customer digital advertising budgets from search to segments in which we are not as deeply penetrated; the development of the market for digital advertising; acceptance and continued usage of our platform and services by customers and our ability to provide high-quality technical support to our customers; material defects in our platform including those resulting from any updates we introduce to our platform, service interruptions at our single third-party data center or breaches in our security measures; our ability to develop enhancements to our platform; our ability to protect our intellectual property; our ability to manage risks associated with international operations; the impact of fluctuations in currency exchange rates, particularly an increase in the value of the dollar; near term changes in sales of our software services or spend under management may not be immediately reflected in our results due to our subscription business model; adverse changes in general economic or market conditions; and the ability to acquire and integrate other businesses. These forward-looking statements are based on current expectations and are subject to uncertainties and changes in condition, significance, value and effect as well as other risks detailed in documents filed with the Securities and Exchange Commission, including our most recent report on Form 10-K, recent reports on Form 10-Q and current reports on Form 8-K which we may file from time to time, all of which are available free of charge at the SEC’s website at www.sec.gov. Any of these risks could cause actual results to differ materially from expectations set forth in the forward-looking statements. All forward-looking statements in this press release reflect Marin’s expectations as of May 10, 2018. Marin assumes no obligation to, and expressly disclaims any obligation to update any such forward-looking statements after the date of this release.

Investor Relations Contact:

Investor Relations, Marin Software

ir@marinsoftware.com

Media Contact:

Wesley MacLaggan

Marketing, Marin Software

(415) 399-2586

press@marinsoftware.com