Rapid7 Announces Pricing of Initial Public Offering

Boston, MA — July 16, 2015

Rapid7, Inc a leading provider of security data and analytics solutions, announced today the pricing of its initial public offering of 6,450,000 shares of common stock at a price to the public of $16.00 per share. All of the shares are being offered by Rapid7. The shares are expected to begin trading on The Nasdaq Global Market on July 17, 2015 under the ticker symbol "RPD". The offering is expected to close on July 22, 2015, subject to customary closing conditions.

In addition, Rapid7 has granted the underwriters a 30-day option to purchase up to an additional 967,500 shares to cover over-allotments, if any.

Morgan Stanley & Co. LLC and Barclays Capital Inc. are acting as joint book-running managers for the offering. Pacific Crest Securities, a division of KeyBanc Capital Markets Inc., William Blair & Company, L.L.C., Raymond James & Associates, Inc., and Cowen and Company, LLC are acting as co-managers. The offering was made only by means of a prospectus. A copy of the final prospectus related to the offering may be obtained, when available, from Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, Second Floor, New York, New York 10014; or Barclays Capital Inc., c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, New York 11717, telephone: (888) 603-5847, email: Barclaysprospectus@broadridge.com.

A registration statement related to these securities has been filed with, and declared effective by, the U.S. Securities and Exchange Commission. Copies of the registration statement can also be accessed by visiting the Securities and Exchange Commission website at www.sec.gov. This press release 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 an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.