Exhibit 10.1

AMENDMENT NO. 1

AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER, dated as of September 13, 2006
(the “Amendment No. 1”), among Phase Forward Incorporated, a Delaware
corporation (“Phase Forward”), Lincoln Technologies, Inc., a Massachusetts
corporation and wholly owned subsidiary of Phase Forward (“Lincoln”) and Lincoln
SR, Inc. as the Securityholder Representative (the “SR”).

WHEREAS, reference is made to the Agreement and Plan of Merger dated as of
August 16, 2005 among Phase Forward, Abe Acquisition Corp., a Massachusetts
corporation and wholly owned subsidiary of Phase Forward, Lincoln Technologies,
Inc., a Massachusetts corporation  and the SR (the “Agreement”);

WHEREAS, pursuant to Section 15.7 of the Agreement, the Agreement may be amended
by the parties against which enforcement of such amendment is sought; and

WHEREAS, Phase Forward, Lincoln and the SR desire to amend the Agreement.

NOW, THEREFORE, in consideration of the promises and the mutual agreements and
covenants hereinafter set forth, and intending to be legally bound, the parties
hereto hereby agree as follows:

1.                             Definitions.  Capitalized terms used in this
Amendment No. 1 and not otherwise defined shall have the meanings ascribed to
them in the Agreement.

2.                             Amendment No. 1 of Section 4.8(a).  Section
4.8(a) of the Agreement is hereby amended by deleting Section 4.8(a) in its
entirety and replacing it with the following:

“(a)                                 As part of the Merger Consideration issued
by Phase Forward in the Merger, in addition to the Base Consideration and in
addition to the $2.0 million payment made in May 2006 (the “2006 Payment”),
Phase Forward shall make the following payment(s) (collectively with the 2006
Payment, the “Earnout”) to the Securityholder Representative for further
distribution to the Lincoln Securityholders in accordance with Sections 4.2 and
4.3:

a fixed payment of $3.5 million due and payable on December 26, 2007 (the “2007
Payment”).”

3.                             No Additional Consideration. Notwithstanding any
other provisions of the Agreement, Lincoln and the SR acknowledge and agree that
the 2007 Payment shall be the only additional consideration payable to the
Lincoln Securityholders under the Agreement other than the release of the Escrow
Amount in accordance with the provisions of the Agreement.

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4.                             Ratification of Agreement.  This Amendment No. 1
shall be construed in connection with and as part of the Agreement, and except
as modified and expressly waived or amended hereby, all terms, conditions and
covenants contained in the Agreement are hereby ratified and shall remain in
full force.

5.                             References to the Agreement.  Any and all
notices, requests, certificates and other instruments executed and delivered
after the execution and delivery of this Amendment No. 1 may refer to the
Agreement without making specific reference to this Amendment No. 1, but
nevertheless, all such references shall include this Amendment No. 1 unless the
context otherwise requires.

6.                             Counterparts.  This Amendment No. 1 may be
executed in two or more counterparts, all of which shall be considered one and
the same instrument and shall become effective when counterparts have been
signed by each party and delivered to the other parties hereto.

7.                             Facsimile Signature.  This Amendment No. 1 may be
executed by facsimile signature and a facsimile signature shall constitute an
original for all purposes.

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IN WITNESS WHEREOF, each party hereto has caused this Amendment No. 1 to be
executed as of the date first written above.

 

PHASE FORWARD INCORPORATED

 

 

 

By:

/s/ Robert K. Weiler

 

 

 

 

Name:

Robert K. Weiler

 

 

 

 

Title:

President and CEO

 

 

 

 

 

 

 

LINCOLN TECHNOLOGIES, INC.

 

 

 

By:

/s/ Robert K. Weiler

 

 

 

 

Name:

Robert K. Weiler

 

 

 

 

Title:

President

 

 

 

 

 

 

 

LINCOLN SR, INC.

 

 

 

 

By:

/s/ Channing H. Russell

 

 

 

 

Name:

Channing H. Russell

 

 

 

 

Title:

President

 

 

Securityholder Representative

 

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