SCHEDULE 14A
                                 (RULE 14A-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT
               (PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE
                        SECURITIES EXCHANGE ACT OF 1934)

Filed by the Registrant  |X|
Filed by a party other than the Registrant  |_|

Check the appropriate box:
|_|  Preliminary Proxy Statement
|_|  Confidential, For Use of the Commission Only (as permitted by
     Rule 14a-6(e)-2)
|_|  Definitive Proxy Statement
|_|  Definitive Additional Materials
|X|  Soliciting Material Pursuant to ss.240.14a-12

                             MERCATOR SOFTWARE, INC.
--------------------------------------------------------------------------------
                  (Name of Registrant Specified in Its Charter)

--------------------------------------------------------------------------------
      (Name of Person(s) Filing Proxy Statement, if Other Than Registrant)

Payment of Filing Fee (Check the appropriate box):
|X|  No fee required
|_|  $125 per Exchange Act Rules 0-11(c)(1)(ii), 14a-6(i)(1), 14a-6(i)(2) or
     Item 22(a)(2) of Schedule 14A
|_|  Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11

(1)  Title of each class of securities to which transaction applies:

(2)  Aggregate number of securities to which transaction applies:

(3)  Per unit price or other underlying value of transaction computed pursuant
     to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee is
     calculated and state how it was determined):

(4)  Proposed maximum aggregate value of transaction:

(5)  Total fee paid:

|_|  Fee paid previously by written preliminary materials:
|_|  Check box if any part of the fee is offset as provided by Exchange Act Rule
     0-11(a)(2) and identify filing for which the offsetting fee was paid
     previously. Identify the previous filing by registration statement number,
     or the Form or Schedule and the date of its filing.

(1)  Amount previously paid:
(2)  Form, Schedule or Registration Statement No.:
(3)  Filing party:
(4)  Date filed:



                                EXPLANATORY NOTE

         Mercator Software, Inc., a Delaware corporation ("Mercator"), is filing
the materials contained in this Schedule 14A with the Securities and Exchange
Commission on March 17, 2003 in connection with the solicitation of proxies for
electing the board of directors of Mercator at the 2003 annual meeting of
Mercator's stockholders.

To:      All Mercator Employees

From:    Roy C. King

Re:      Proxy Contest

Date:    March 17, 2003

         I wanted to take this opportunity to explain the events that unfolded
late on Friday. A small group of dissidents stated that it intends to solicit
proxies in an attempt to take control of Mercator's board of directors by waging
a "proxy contest" against our company.

         In the simplest terms, a proxy contest is like a political election. It
is a contest between opposing sides to elect the persons they support to serve
on a company's board of directors. Like all publicly-traded companies, Mercator
holds an annual stockholders' meeting, at which the board of directors is
elected. In connection with this election, Mercator sends to each of its
stockholders a document known as a proxy statement. This document identifies the
persons whom Mercator nominates for election as board members and solicits the
"proxy" of Mercator's stockholders to vote their shares in support of this
slate. Most often, directors run for their seats without opposition. A "proxy
contest" occurs when a stockholder or group of stockholders nominates one or
more directors to oppose those nominated by the company. That stockholder will
then seek the "proxies" of Mercator's stockholders to vote in support of their
nominees in opposition to the company's nominees, using their own separate proxy
statement. The nominees who receive the votes of the most shares of stock will
be elected as Mercator's directors.

         From what SSH has announced, its goal is to take control of Mercator
without offering to purchase it or otherwise to further invest in Mercator.

         We are disappointed that a small group of stockholders whose interests
clearly appear to be focused on short-term gain would seek to change the
direction of Mercator at such a propitious moment. Mercator intends to continue
to take all appropriate steps to protect the interests of all of its
stockholders and maximize stockholder value. We are encouraged by the support we
have already received from our employees and stockholders and are confident that
the effort by SSH to gain control of our company will be rejected.

         We appreciate your continued dedication and support. Let's keep up the
momentum that we gained in the fourth quarter by staying focused on our
objectives and executing on our strategic plan. Thanks to you, our company is
continuing to provide industry-leading products and services to our customers
and business partners, as well as building value for our stockholders. We hope
that this has answered some of your questions. We will continue to keep you
informed.

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         Please note that below is some legal "jargon" and other information
provided in order for us to comply with certain rules of the U.S. Securities and
Exchange Commission (SEC).

IMPORTANT INFORMATION

         Mercator plans to file a proxy statement with the Securities and
Exchange Commission relating to Mercator's solicitation of proxies from the
stockholders of Mercator with respect to the Mercator 2003 annual meeting of
stockholders. MERCATOR ADVISES SECURITY HOLDERS TO READ ITS PROXY STATEMENT WHEN
IT BECOMES AVAILABLE, BECAUSE IT WILL CONTAIN IMPORTANT INFORMATION. Mercator's
proxy statement and other relevant documents will be available for free at
www.sec.gov. You may also obtain a free copy of Mercator's definitive proxy
statement, when it becomes available, by writing to Mercator at 45 Danbury Road,
Wilton, CT 06897 or at www.mercator.com. Detailed information regarding the
names, affiliation and interests of individuals who may be deemed participants
in the solicitation of proxies of Mercator's stockholders is provided below and
will be available in the soliciting materials on Schedule 14A to be filed by
Mercator with the SEC.

FORWARD-LOOKING STATEMENTS

         Statements in this memo that are not purely historical are
forward-looking statements, including statements regarding Mercator's beliefs,
expectations, hopes or intentions regarding the future. Forward-looking
statements in this release include, but are not limited to, statements regarding
the growth of the enterprise application market; the demand for Mercator's
application integration solutions; and the speed of deployment of new products,
including the Mercator Inside Integrator suite of products and Industry-Ready
Integration Solutions; and sometimes contain words such as "believe," "expect,"
"intend," "anticipate," "plan," and "estimate" or similar expressions. Actual
outcomes and Mercator's actual results could differ materially from
forward-looking statements. Factors that could cause actual results to differ
materially include risks and uncertainties such as changes in demand for
application integration or e-business integration software and, in particular,
the Mercator's Inside Integrator suite of products and Industry-Ready
Integration Solutions; the ability of Mercator to manage its global operations;
the ability of Mercator to develop and introduce new or enhanced products; the
ability of Mercator to continue to add resellers and other distribution
channels; the success of third parties in utilizing and marketing Mercator's
products; the success of the vertical industries and platforms we target;
Mercator's access to and success of third party products in which we embed our
products or in which our products are embedded; Mercator's ability to raise
financing; and seasonality in operating results. Readers should also refer to
the risk disclosures outlined in Mercator's reports filed with the Securities
and Exchange Commission. All forward-looking statements and reasons why results
might differ included in this memo are made as of the date hereof based on
information available to Mercator as of the date hereof. Mercator assumes no
obligation to update any such forward-looking statement or reasons why results
might differ.

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INFORMATION REGARDING PARTICIPANTS

         This memo is not a proxy statement. Mercator and the directors and
certain of the executive officers of Mercator may be deemed to be participants
in the solicitation of proxies in respect of electing the board of directors of
Mercator at the 2003 annual meeting of stockholders of Mercator. Those executive
officers and directors of Mercator are: Roy C. King, Jill M. Donohoe, David L.
Goret, Kenneth J. Hall, Mark W. Register, James P. Schadt, Constance F. Galley,
Ernest E. Keet, Michael E. Lehman, Dennis G. Sisco and Mark C. Stevens.

         Those executive officers and directors have interests in the
solicitation from their beneficial ownership of the common stock of Mercator.
Additional information with respect to the beneficial ownership of those
executive officers and directors of Mercator common stock is set forth
immediately below:




Name                                                                                           Shares
----                                                                                           ------
                                                                                          
Roy C. King, CHAIRMAN, CHIEF EXECUTIVE OFFICER, PRESIDENT AND DIRECTOR ...................   1,019,276
Jill M. Donohoe, SENIOR VICE PRESIDENT, GLOBAL ALLIANCES AND CORPORATE DEVELOPMENT........     201,557
David L. Goret, SENIOR VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY......................      47,734
Kenneth J. Hall, EXECUTIVE VICE PRESIDENT, CHIEF FINANCIAL OFFICER AND TREASURER..........     408,486
Mark W. Register, EXECUTIVE VICE PRESIDENT AND PRESIDENT, WORLDWIDE FIELD OPERATIONS......     234,706
James P. Schadt, VICE CHAIRMAN AND DIRECTOR...............................................     598,457
Constance F. Galley, DIRECTOR.............................................................     963,304
Ernest E. Keet, DIRECTOR..................................................................   1,666,867
Michael E. Lehman, DIRECTOR...............................................................      37,500
Dennis G. Sisco, DIRECTOR.................................................................     110,000
Mark C. Stevens, DIRECTOR.................................................................      60,000


         Mercator's directors also receive customary compensation from Mercator
in exchange for their services as directors, and Mercator's change of control
plan provides that, upon the occurrence of a change of control, all of the
executive officers' unvested options will vest and that, upon the occurrence of
certain events following a change in control of Mercator, they may be entitled
to receive compensation and other payments.

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