Exhibit 99.1

Rapid7 Delivers Record Second Quarter 2016 Financial Results with 45% Year-Over-Year Revenue Growth and Positive Operating Cash Flow

Company also announces transition of chief financial officer, Steven Gatoff, for personal reasons, effective January 2017

Boston, MA – August 8, 2016 – Rapid7, Inc. (NASDAQ: RPD), a leading provider of security data and analytics solutions, today announced its financial results for the second quarter of 2016.

“Our strong performance in the second quarter reflects the growing demand for our differentiated solutions, our focus on driving scale and efficiencies across the business and continued adoption of our cloud-based data and analytics platform,” said Corey Thomas, president and chief executive officer of Rapid7. “We are very excited about the positive customer response we received from our recent Nexpose Now launch this past May, which demonstrates both our customer loyalty and reinforced our commitment to innovation. As we look towards the second half of 2016, we are pleased with the healthy demand coming from technology professionals seeking solutions that help them gain the insight to drive their business forward.”

“Solid new customer growth, strong renewals and noteworthy conversion rates reflected in our large deal pipeline helped us to exceed our second quarter 2016 guidance,” said Steven Gatoff, chief financial officer of Rapid7. “We also made great progress on our path to profitability by generating $1.9 million in operating cash flow in the second quarter of 2016, which positions us well for future growth.”

Second Quarter 2016 Financial Highlights

Announcement of CFO Transition

The company also announced today that Steven Gatoff, its chief financial officer, will be transitioning out of the company for personal family reasons effective January 2017. The company has already initiated a search to identify a successor and Mr. Gatoff has committed to supporting a thorough and orderly transition.

“On behalf of the Board of Directors and the whole Rapid7 team, I want to thank Steven for his many contributions to the company,” said Mr. Thomas. “Steven joined Rapid7 as CFO almost four years ago when I became CEO, and he has been a terrific partner and played an instrumental role in the growth of Rapid7, including preparing for and taking us through our IPO. I continue to be very confident that our management team is well positioned to drive the execution of our strategic vision and growth. We all wish Steven and his family much success and happiness in their return home to the west coast.”

“The last four years here in Boston at Rapid7 have been tremendous,” said Mr. Gatoff. “It was a very difficult decision, but it’s the right time for me to head back to our home in California with my wife and two young daughters. I am incredibly proud of what we have achieved together at Rapid7, and even more excited about the company’s terrific momentum and compelling future leading the security data and analytics market. Rapid7 has a strong team in place and I am confident in the company’s ongoing success.”

Strategic Addition to the Board of Directors:

Recent Business Highlights

Continued Strong Customer Momentum and Growth:

Technology Platform and Product Innovation:

Continued Evolution of Strategic Professional Services:

Robust Technology Partnerships:

Community Leadership and Research:

Third Quarter and Full-Year 2016 Guidance

Rapid7 anticipates total revenue, non-GAAP loss from operations, and non-GAAP net loss per share to be in the following ranges:

Third Quarter 2016:

The third quarter net loss per share (non-GAAP) calculation assumes 41.6 million basic and diluted weighted average common shares outstanding.

Full-Year 2016:

The full-year net loss per share calculation (non-GAAP) assumes 41.4 million basic and diluted weighted average common shares outstanding. Guidance for the third quarter and full-year 2016 does not include any potential impact of foreign exchange gains or losses.

Conference Call and Webcast Information

Rapid7 will host a conference call today to discuss its results at 5:00 p.m. Eastern Time. The call will be accessible by telephone at 877-256-8253 (domestic) or 312-429-1278 (international). The call will also be available live via webcast on the company’s web site at http://investors.rapid7.com. A telephone replay of the conference call will be available at 800-633-8284 or 402-977-9140 (access code 21813692) until August 11, 2016. A webcast replay will be available at http://investors.rapid7.com.

About Rapid7

Rapid7 is a leading provider of security data and analytics solutions that enable organizations to implement an active, analytics-driven approach to cyber security. We combine our extensive experience in security data and analytics and deep insight into attacker behaviors and techniques to make sense of the wealth of data available to organizations about their IT environments and users. Our solutions empower organizations to prevent attacks by providing visibility into vulnerabilities and to rapidly detect compromises, respond to breaches, and correct the underlying causes of attacks. Rapid7 is trusted by more than 5,600 organizations across over 100 countries, including 37% of the Fortune 1000. To learn more about Rapid7 or get involved in our threat research, visit www.rapid7.com.

Non-GAAP Financial Measures

To supplement our consolidated financial statements, which are prepared and presented in accordance with generally accepted accounting principles in the United States, or GAAP, we provide investors with certain non-GAAP financial measures, including non-GAAP gross profit, non-GAAP operating loss and non-GAAP net loss, which we collectively refer to as non-GAAP financial measures. These non-GAAP financial measures exclude all or a combination of the following: stock-based compensation expense, amortization of acquired intangible assets and acquisition related expenses. The presentation of the non-GAAP financial measures is not intended to be considered in isolation or as a substitute for, or superior to, the financial information prepared and presented in accordance with GAAP. We use these non-GAAP financial measures for financial and operational decision-making purposes and as a means to evaluate period-to-period comparisons, and use certain non-GAAP financial measures as performance measures under our executive bonus plan. We believe that these non-GAAP financial measures provide useful information about our operating results, enhance the overall understanding of past financial performance and future prospects and allow for greater transparency with respect to metrics used by our management in its financial and operational decision making. While our non-GAAP financial measures are an important tool for financial and operational decision making and for evaluating our own operating results over different periods of time, you should consider our non-GAAP financial measures alongside our GAAP financial results.

We exclude stock-based compensation expense because of varying available valuation methodologies, subjective assumptions and the variety of equity instruments that can impact our non-cash expense. We believe that providing non-GAAP financial measures that exclude stock-based compensation expense allow for more meaningful comparisons between our operating results from period to period. We believe that excluding the impact of amortization of intangible assets allows for more meaningful comparisons between operating results from period to period as the intangibles are valued at the time of acquisition and are amortized over a period of several years after the acquisition. We also exclude the impact of costs directly related to acquisitions as these costs are unrelated to the current operations and neither comparable to the prior period nor predictive of future

results, which we believe allows for a more meaningful comparison between the operating results from period to period. Accordingly, we believe that excluding these expenses provides investors and management with greater visibility of the underlying performance of our business operations, facilitates comparison of our results with other periods and may also facilitate comparison with the results of other companies in our industry.

While a reconciliation of non-GAAP guidance measures to corresponding GAAP measures is not available on a forward-looking basis as a result of the uncertainty regarding, and the potential variability of, many of these costs and expenses that we may incur in the future, we have provided a reconciliation of GAAP to non-GAAP financial measures in the accompanying financial statement tables included in this press release for non-GAAP results for the three and six months ended June 30, 2015 and 2016.

There are limitations in using non-GAAP financial measures because the non-GAAP financial measures are not prepared in accordance with GAAP, may be different from non-GAAP financial measures used by other companies and exclude expenses that may have a material impact upon our reported financial results. Further, stock-based compensation expense has been and will continue to be for the foreseeable future a significant recurring expense in our business and an important part of the compensation provided to our employees.

Cautionary Language Concerning Forward-Looking Statements

This press release includes forward-looking statements. All statements contained in this press release other than statements of historical facts, including, without limitation, statements regarding our future financial and business performance for the third quarter and full-year 2016, the quality of our sales pipeline, our ability to convert our sales pipeline into revenue, technical innovations, demand for our product offerings, market opportunity and plans and objectives for future operations , including our ability to drive continued revenue growth and positive operating and free cash flow and progress towards profitability, are forward-looking statements. The words “anticipate,” “believe,” “continue,” “estimate,” “expect,” “intend,” “may,” “will” and similar expressions are intended to identify forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy, short-term and long-term business operations and objectives and financial needs. These forward-looking statements are subject to a number of risks and uncertainties, including, without limitation, risks related to our rapid growth and ability to sustain our revenue growth rate, the ability of our products and professional services to correctly detect vulnerabilities, competition in the markets in which we operate, market growth, our ability to innovate and manage our growth, our ability to integrate acquired operations, our ability to operate in compliance with applicable laws as well as other risks and uncertainties set forth in the “Risk Factors” section of our Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission for the quarterly period ended March 31, 2016, 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. We are under no

duty to update any of these forward-looking statements after the date of this press release to conform these statements to actual results or revised expectations, except as required by law. You should, therefore, not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this press release.

Contact:

Mark Donohue

Vice President, Treasury and Investor Relations

857-415-4419 or investors@rapid7.com

Rapid7, Inc.

Consolidated Balance Sheets

(Unaudited, in thousands)

Rapid7, Inc.

Consolidated Statements of Operations

(Unaudited, in thousands, except share and per share data)

Rapid7, Inc.

Consolidated Statements of Cash Flows

(unaudited, in thousands)

Rapid7, Inc.

GAAP to Non-GAAP Reconciliation

(unaudited, in thousands, except share and per share data)