Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

Rapid7, Inc.:

We consent to the incorporation by reference in the registration statements (Nos. 333-205716, 333-207395, 333-210082, 333-216566 and 333-223525) on Form S-8 and the registration statement (No. 333-218189) on Form S-3 of Rapid7, Inc. (the Company) of our report dated February 28, 2019, with respect to the consolidated balance sheets of Rapid7, Inc. as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive loss, changes in stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2018, and the related notes, and the effectiveness of internal control over financial reporting as of December 31, 2018, which report appears in the December 31, 2018 annual report on Form 10‑K of Rapid7, Inc.

Our report refers to the Company's adoption of Accounting Standards Update 2014-09, Revenue from Contracts with Customers (Topic 606) in 2018.

/s/ KPMG LLP

Boston, Massachusetts

February 28, 2019