CONTACT: Jennifer Blum
                                                          212.381.5705
                                                          jblum@doubleclick.net

              DOUBLECLICK INC. ANNOUNCES COMPLETION OF ZERO COUPON
                     CONVERTIBLE SUBORDINATED NOTE OFFERING

      CALLS OUTSTANDING 4.75% CONVERTIBLE SUBORDINATED NOTES FOR REDEMPTION

NEW YORK, NY, June 23, 2003 - DoubleClick Inc. (Nasdaq: DCLK) today announced
that it has closed its sale of $135 million aggregate principal amount of Zero
Coupon Convertible Subordinated Notes due 2023. The initial purchaser has the
option to purchase up to an additional $20.25 million in aggregate principal
amount of the Notes.

The Notes do not bear interest and have a zero yield to maturity. The Notes are
convertible under certain circumstances into DoubleClick Inc. common stock at a
conversion price of approximately $13.12 per share, subject to adjustment. The
Notes will be DoubleClick's general unsecured obligations and will be
subordinated in right of payment to all of its existing and future senior debt.
DoubleClick may not redeem the Notes prior to July 15, 2008.

DoubleClick also initiated a call for redemption of all of its $154.8 million
outstanding aggregate principal amount of 4.75% Convertible Subordinated Notes
due 2006. The redemption date has been set at July 24, 2003. Notices of
redemption will be mailed to holders of the 4.75% Convertible Subordinated Notes
on June 24, 2003. The proceeds from the sale of the Notes, together with
existing cash, will be used towards this redemption.

The Notes have been offered only to qualified institutional buyers in reliance
on Rule 144A under the Securities Act of 1933, and outside the United States
pursuant to Regulation S of the Securities Act. The Notes and the shares of
common stock of DoubleClick Inc. issuable upon the conversion of the Notes have
not been registered under the Securities Act and may not be offered or sold in
the United States or to a U.S. person absent registration or an applicable
exemption from registration requirements.

This press release does not constitute an offer to sell or the solicitation of
an offer to buy any security and shall not constitute an offer, solicitation or
sale in any jurisdiction in which such offering would be unlawful.

Note: The statements in this release which are not historical facts are
forward-looking statements that involve risks and uncertainties, including, but
not limited to, market and competitive conditions. Information on risks and
factors that could



affect DoubleClick Inc. business and financial results are included in our
public filings made with the Securities and Exchange Commission.

ABOUT DOUBLECLICK INC.

DoubleClick Inc. has global headquarters in New York City and maintains 21
offices around the world.

                                       ###