Document:

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                                                                     EXHIBIT 4.1

                              AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                                       OF
                           ART TECHNOLOGY GROUP, INC.

Art Technology Group, Inc., a corporation organized and existing under and by
virtue of the General Corporation Law of the State of Delaware, does hereby
certify as follows:

         1.       The Corporation filed its original Certificate of
Incorporation with the Secretary of the State of Delaware on October 22, 1997.

         2.       At a duly called meeting of the Board of Directors of the
Corporation at which a quorum was present at all times, a resolution was duly
adopted, pursuant to Sections 242 and 245 of the General Corporation Law of the
State of Delaware, setting forth an Amended and Restated Certificate of
Incorporation of the Corporation and declaring said Amended and Restated
Certificate of Incorporation advisable. The stockholders of the Corporation duly
approved said proposed Amended and Restated Certificate of Incorporation by
written consent in accordance with Sections 228, 242 and 245 of the General
Corporation Law of the State of Delaware, and written notice of such consent is
being promptly given to all stockholders who have not consented in writing to
said Amended and Restated Certificate of Incorporation. The resolution setting
forth the Amended and Restated Certificate of Incorporation is as follows:

RESOLVED:         That the Certificate of Incorporation of the Corporation, be
             and hereby is amended and restated in its entirety so that the same
             shall read as follows:

         FIRST. The name of the Corporation is:

                           Art Technology Group, Inc.

SECOND. The address of its registered office in the State of Delaware is
Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County
of New Castle. The name of its registered agent at such address is The
Corporation Trust Company.

THIRD. The nature of the business or purposes to be conducted or promoted by the
Corporation is as follows:

To engage in any lawful act or activity for which corporations may be organized
under the General Corporation Law of Delaware.

FOURTH: The total number of shares of all classes of stock which the Corporation
shall have authority to issue is 110,000,000 shares, consisting of (i)
100,000,000 shares of Common Stock, $.01 par value per share ("Common Stock"),
and (ii) 10,000,000 shares of Preferred Stock, $.01 par value per share
("Preferred Stock").

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The following is a statement of the designations and the powers, preferences and
rights, and the qualifications, limitations or restrictions thereof in respect
of each class of capital stock of the Corporation (and written actions in lieu
of meetings).

A.       COMMON STOCK.

         1.       General. The voting, dividend and liquidation rights of the
holders of the Common Stock are subject to and qualified by the rights
of the holders of the Preferred Stock of any series as may be designated by the
Board of Directors upon any issuance of the Preferred Stock of any series.

         2.       Voting. The holders of the Common Stock are entitled to one
vote for each share held at all meetings of stockholders. There shall be no
cumulative voting.

The number of authorized shares of Common Stock may be increased or decreased
(but not below the number of shares thereof then outstanding) by the affirmative
vote of the holders of a majority of the stock of the Corporation entitled to
vote, irrespective of the provisions of Section 242(b)(2) of the General
Corporation Law of Delaware.

         3.       Dividends. Dividends may be declared and paid on the Common
Stock from funds lawfully available therefor as and when determined by the Board
of Directors and subject to any preferential dividend rights of any then
outstanding Preferred Stock.

         4.       Liquidation. Upon the dissolution or liquidation of the
Corporation, whether voluntary or involuntary, holders of Common Stock will be
entitled to receive all assets of the Corporation available for distribution to
its stockholders, subject to any preferential rights of any then outstanding
Preferred Stock.

B.       PREFERRED STOCK.

Preferred Stock may be issued from time to time in one or more series, each of
such series to have such terms as stated or expressed herein and in the
resolution or resolutions providing for the issue of such series adopted by the
Board of Directors of the Corporation as hereinafter provided. Any shares of
Preferred Stock which may be redeemed, purchased or acquired by the Corporation
may be reissued except as otherwise provided by law. Different series of
Preferred Stock shall not be construed to constitute different classes of shares
for the purposes of voting by classes unless expressly provided.

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Authority is hereby expressly granted to the Board of Directors from time to
time to issue the Preferred Stock in one or more series, and in connection with
the creation of any such series, by resolution or resolutions providing for the
issue of the shares thereof, to determine and fix such voting powers, full or
limited, or no voting powers, and such designations, preferences and relative
participating, optional or other special rights, and qualifications, limitations
or restrictions thereof, including without limitation thereof, dividend rights,
conversion rights, redemption privileges and liquidation preferences, as shall
be stated and expressed in such resolutions, all to the full extent now or
hereafter permitted by the General Corporation Law of Delaware. Without limiting
the generality of the foregoing, the resolutions providing for issuance of any
series of Preferred Stock may provide that such series shall be superior or rank
equally or be junior to the Preferred Stock of any other series to the extent
permitted by law. Except as otherwise provided in this Certificate of
Incorporation, no vote of the holders of the Preferred Stock or Common Stock
shall be a prerequisite to the designation or issuance of any shares of any
series of the Preferred Stock authorized by and complying with the conditions of
this Certificate of Incorporation, the right to have such vote being expressly
waived by all present and future holders of the capital stock of the
Corporation.

         FIFTH. The Corporation shall have a perpetual existence.

SIXTH. In furtherance of and not in limitation of powers conferred by statute,
it is further provided:

                  1.       Election of directors need not be by written ballot,
except as and to the extent provided in the By-Laws of the Corporation.

                  2.       The Board of Directors is expressly authorized to
adopt, amend or repeal the By-Laws of the Corporation, except as and to the
extent provided in the By-Laws of the Corporation.

SEVENTH. Whenever a compromise or arrangement is proposed between this
corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation or of any creditor or stockholder thereof, or on the
application of any receiver or receivers appointed for this corporation under
the provisions of section 291 of Title 8 of the Delaware Code or on the
application of trustees in dissolution or of any receiver or receivers appointed
for this corporation under the provisions of section 279 of Title 8 of the
Delaware Code order a meeting of the creditors or class of creditors, and/or of
the stockholders or class of stockholders of this corporation, as the case may
be, to be summoned in such manner as the said court directs. If a majority in
number representing three-fourths in value of the creditors or class of
creditors, and/or of the stockholders or class of stockholders of this
corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this corporation as consequence of such compromise or
arrangement, the said compromise or arrangement and the said reorganization
shall, if sanctioned by the court to which the said application has been made,
be binding on all the creditors or class of creditors, and/or on all the
stockholders or class of stockholders, of this corporation, as the case may be,
and also on this corporation.

EIGHTH. Except to the extent that the General Corporation Law of Delaware
prohibits the elimination or limitation of liability of directors for breaches
of fiduciary duty, no director of the Corporation shall be personally liable to
the Corporation or its stockholders for monetary damages for any breach of
fiduciary duty as a director, notwithstanding any provision of law imposing such
liability. No amendment to or repeal of this provision shall apply to or have
any effect on the liability or alleged liability of any director of the
Corporation for or with respect to any acts or omissions of such director
occurring prior to such amendment.

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NINTH. 1. Actions, Suits and Proceedings Other than by or in the Right of the
Corporation. The Corporation shall indemnify each person who was or is a party
or is threatened to be made a party to any threatened, pending or completed
action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the Corporation), by
reason of the fact that he is or was, or has agreed to become, a director or
officer of the Corporation, or is or was serving, or has agreed to serve, at the
request of the Corporation, as a director, officer or trustee of, or in a
similar capacity with, another corporation, partnership, joint venture, trust or
other enterprise (including any employee benefit plan) (all such persons being
referred to hereafter as an "Indemnitee"), or by reason of any action alleged to
have been taken or omitted in such capacity, against all expenses (including
attorneys' fees), judgments, fines and amounts paid in settlement actually and
reasonably incurred by him or on his behalf in connection with such action, suit
or proceeding and any appeal therefrom, if he acted in good faith and in a
manner he reasonably believed to be in, or not opposed to, the best interests of
the Corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful. The termination of any
action, suit or proceeding by judgment, order, settlement, conviction or upon a
plea of nolo contendere or its equivalent, shall not, of itself, create a
presumption that the person did not act in good faith and in a manner which he
reasonably believed to be in, or not opposed to, the best interests of the
Corporation, and, with respect to any criminal action or proceeding, had
reasonable cause to believe that his conduct was unlawful. Notwithstanding
anything to the contrary in this Article, except as set forth in Section 7
below, the Corporation shall not indemnify an Indemnitee seeking indemnification
in connection with a proceeding (or part thereof) initiated by the Indemnitee
unless the initiation thereof was approved by the Board of Directors of the
Corporation. Notwithstanding anything to the contrary in this Article, the
Corporation shall not indemnify an Indemnitee to the extent such Indemnitee is
reimbursed from the proceeds of insurance, and in the event the Corporation
makes any indemnification payments to an Indemnitee and such Indemnitee is
subsequently reimbursed from the proceeds of insurance, such Indemnitee shall
promptly refund such indemnification payments to the Corporation to the extent
of such insurance reimbursement.

         2.       Actions or Suits by or in the Right of the Corporation. The
Corporation shall indemnify any Indemnitee who was or is a party or is
threatened to be made a party to any threatened, pending or completed action or
suit by or in the right of the Corporation to procure a judgment in its favor by
reason of the fact that he is or was, or has agreed to become, a director or
officer of the Corporation, or is or was serving, or has agreed to serve, at the
request of the Corporation, as a director, officer or trustee of, or in a
similar capacity with, another corporation, partnership, joint venture, trust or
other enterprise (including any employee benefit plan), or by reason of any
action alleged to have been taken or omitted in such capacity, against all
expenses (including attorneys' fees) and, to the extent permitted by law,
amounts paid in settlement actually and reasonably incurred by him or on his
behalf in connection with such action, suit or proceeding and any appeal
therefrom, if he acted in good faith and in a manner he reasonably believed to
be in, or not opposed to, the best interests of the Corporation, except that no
indemnification shall be made in respect of any claim, issue or matter as to
which such person shall have been adjudged to be liable to the Corporation
unless and only to the extent that the Court of Chancery of Delaware shall
determine upon application that, despite the adjudication of such liability but
in view of all the circumstances of the case, such person is fairly and
reasonably entitled to indemnity for such expenses (including attorneys' fees)
which the Court of Chancery of Delaware shall deem proper.

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         3.       Indemnification for Expenses of Successful Party.
Notwithstanding the other provisions of this Article, to the extent that an
Indemnitee has been successful, on the merits or otherwise, in defense of any
action, suit or proceeding referred to in Sections 1 and 2 of this Article, or
in defense of any claim, issue or matter therein, or on appeal from any such
action, suit or proceeding, he shall be indemnified against all expenses
(including attorneys' fees) actually and reasonably incurred by him or on his
behalf in connection therewith. Without limiting the foregoing, if any action,
suit or proceeding is disposed of, on the merits or otherwise (including a
disposition without prejudice), without (i) the disposition being adverse to the
Indemnitee, (ii) an adjudication that the Indemnitee was liable to the
Corporation, (iii) a plea of guilty or nolo contendere by the Indemnitee, (iv)
an adjudication that the Indemnitee did not act in good faith and in a manner he
reasonably believed to be in or notopposed to the best interests of the
Corporation, and (v) with respect to any criminal proceeding, an adjudication
that the Indemnitee had reasonable cause to believe his conduct was unlawful,
the Indemnitee shall be considered for the purposes hereof to have been wholly
successful with respect thereto.

         4.       Notification and Defense of Claim. As a condition precedent to
his right to be indemnified, the Indemnitee must notify the Corporation in
writing as soon as practicable of any action, suit, proceeding or investigation
involving him for which indemnity will or could be sought. With respect to any
action, suit, proceeding or investigation of which the Corporation is so
notified, the Corporation will be entitled to participate therein at its own
expense and/or to assume the defense thereof at its own expense, with legal
counsel reasonably acceptable to the Indemnitee. After notice from the
Corporation to the Indemnitee of its election so to assume such defense, the
Corporation shall not be liable to the Indemnitee for any legal or other
expenses subsequently incurred by the Indemnitee in connection with such claim,
other than as provided below in this Section 4. The Indemnitee shall have the
right to employ his own counsel in connection with such claim, but the fees and
expenses of such counsel incurred after notice from the Corporation of its
assumption of the defense thereof shall be at the expense of the Indemnitee
unless (i) the employment of counsel by the Indemnitee has been authorized by
the Corporation, (ii) counsel to the Indemnitee shall have reasonably concluded
that there may be a conflict of interest or position on any significant issue
between the Corporation and the Indemnitee in the conduct of the defense of such
action or (iii) the Corporation shall not in fact have employed counsel to
assume the defense of such action, in each of which cases the fees and expenses
of counsel for the Indemnitee shall be at the expense of the Corporation, except
as otherwise expressly provided by this Article. The Corporation shall not be
entitled, without the consent of the Indemnitee, to assume the defense of any
claim brought by or in the right of the Corporation or as to which counsel for
the Indemnitee shall have reasonably made the conclusion provided for in clause
(ii) above.

         5.       Advance of Expenses. Subject to the provisions of Section 6
below, in the event that the Corporation does not assume the defense pursuant to
Section 4 of this Article of any action, suit, proceeding or investigation of
which the Corporation receives notice under this Article, any expenses
(including attorneys' fees) incurred by an Indemnitee in defending a civil or
criminal action, suit, proceeding or investigation or any appeal therefrom shall
be paid by the Corporation in advance of the final disposition of such matter;
provided, however, that the payment of such expenses incurred by an Indemnitee
in advance of the final disposition of such matter shall be made only upon
receipt of an undertaking by or on behalf of the Indemnitee to repay all amounts
so advanced in the event that it shall ultimately be determined that the
Indemnitee is not entitled to be indemnified by the Corporation as authorized in
this Article. Such undertaking shall be accepted without reference to the
financial ability of the Indemnitee to make such repayment.

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         6.       Procedure for Indemnification. In order to obtain
indemnification or advancement of expenses pursuant to Section 1, 2, 3 or 5 of
this Article, the Indemnitee shall submit to the Corporation a written request,
including in such request such documentation and information as is reasonably
available to the Indemnitee and is reasonably necessary to determine whether and
to what extent the Indemnitee is entitled to indemnification or advancement of
expenses. Any such indemnification or advancement of expenses shall be made
promptly, and in any event within 60 days after receipt by the Corporation of
the written request of the Indemnitee, unless with respect to requests under
Section 1, 2 or 5 the Corporation determines within such 60-day period that the
Indemnitee did not meet the applicable standard of conduct set forth in Section
1 or 2, as the case may be. Such determination shall be made in each instance by
(a) a majority vote of the directors of the Corporation consisting of persons
who are not at that time parties to the action, suit or proceeding in question
("disinterested directors"), whether or not a quorum, (b) a majority vote of a
committee of disinterested directors designated by majority vote of
disinterested directors, whether or not a quorum, (c) a majority vote of a
quorum of the outstanding shares of stock of all classes entitled to vote for
directors, voting as a single class, which quorum shall consist of stockholders
who are not at that time parties to the action, suit or proceeding in question,
(d) independent legal counsel (who may, to the extent permitted by law, be
regular legal counsel to the Corporation), or (e) a court of competent
jurisdiction.

         7.       Remedies. The right to indemnification or advances as granted
by this Article shall be enforceable by the Indemnitee in any court of competent
jurisdiction if the Corporation denies such request, in whole or in part, or if
no disposition thereof is made within the 60-day period referred to above in
Section 6. Unless otherwise required by law, the burden of proving that the
Indemnitee is not entitled to indemnification or advancement of expenses under
this Article shall be on the Corporation. Neither the failure of the Corporation
to have made a determination prior to the commencement of such action that
indemnification is proper in the circumstances because the Indemnitee has met
the applicable standard of conduct, nor an actual determination by the
Corporation pursuant to Section 6 that the Indemnitee has not met such
applicable standard of conduct, shall be a defense to the action or create a
presumption that the Indemnitee has not met the applicable standard of conduct.
The Indemnitee's expenses (including attorneys' fees) incurred in connection
with successfully establishing his right to indemnification, in whole or in
part, in any such proceeding shall also be indemnified by the Corporation.

         8.       Subsequent Amendment. No amendment, termination or repeal of
this Article or of the relevant provisions of the General Corporation Law of
Delaware or any other applicable laws shall affect or diminish in any way the
rights of any Indemnitee to indemnification under the provisions hereof with
respect to any action, suit, proceeding or investigation arising out of or
relating to any actions, transactions or facts occurring prior to the final
adoption of such amendment, termination or repeal.

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         9.       Other Rights. The indemnification and advancement of expenses
provided by this Article shall not be deemed exclusive of any other rights to
which an Indemnitee seeking indemnification or advancement of expenses may be
entitled under any law (common or statutory), agreement or vote of stockholders
or disinterested directors or otherwise, both as to action in his official
capacity and as to action in any other capacity while holding office for the
Corporation, and shall continue as to an Indemnitee who has ceased to be a
director or officer, and shall inure to the benefit of the estate, heirs,
executors and administrators of the Indemnitee. Nothing contained in this
Article shall be deemed to prohibit, and the Corporation is specifically
authorized to enter into, agreements with officers and directors providing
indemnification rights and procedures different from those set forth in this
Article. In addition, the Corporation may, to the extent authorized from time to
time by its Board of Directors, grant indemnification rights to other employees
or agents of the Corporation or other persons serving the Corporation and such
rights may be equivalent to, or greater or less than, those set forth in this
Article.

         10.      Partial Indemnification. If an Indemnitee is entitled under
any provision of this Article to indemnification by the Corporation for some or
a portion of the expenses (including attorneys' fees), judgments, fines or
amounts paid in settlement actually and reasonably incurred by him or on his
behalf in connection with any action, suit, proceeding or investigation and any
appeal therefrom but not, however, for the total amount thereof, the Corporation
shall nevertheless indemnify the Indemnitee for the portion of such expenses
(including attorneys' fees), judgments, fines or amounts paid in settlement to
which the Indemnitee is entitled.

         11.      Insurance. The Corporation may purchase and maintain
insurance, at its expense, to protect itself and any director, officer, employee
or agent of the Corporation or another corporation, partnership, joint venture,
trust or other enterprise (including any employee benefit plan) against any
expense, liability or loss incurred by him in any such capacity, or arising out
of his status as such, whether or not the Corporation would have the power to
indemnify such person against such expense, liability or loss under the General
Corporation Law of Delaware.

         12.      Merger or Consolidation. If the Corporation is merged into or
consolidated with another corporation and the Corporation is not the surviving
corporation, the surviving corporation shall assume the obligations of the
Corporation under this Article with respect to any action, suit, proceeding or
investigation arising out of or relating to any actions, transactions or facts
occurring prior to the date of such merger or consolidation.

         13.      Savings Clause. If this Article or any portion hereof shall be
invalidated on any ground by any court of competent jurisdiction, then the
Corporation shall nevertheless indemnify each Indemnitee as to any expenses
(including attorneys' fees), judgments, fines and amounts paid in settlement in
connection with any action, suit, proceeding or investigation, whether civil,
criminal or administrative, including an action by or in the right of the
Corporation, to the fullest extent permitted by any applicable portion of this
Article that shall not have been invalidated and to the fullest extent permitted
by applicable law.

         14.      Definitions. Terms used herein and defined in Section 145(h)
and Section 145(i) of the General Corporation Law of Delaware shall have the
respective meanings assigned to such terms in such Section 145(h) and Section
145(i).

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         15.      Subsequent Legislation. If the General Corporation Law of
Delaware is amended after adoption of this Article to expand further the
indemnification permitted to Indemnitees, then the Corporation shall indemnify
such persons to the fullest extent permitted by the General Corporation Law of
Delaware, as so amended.

TENTH. Except as otherwise provided herein, the Corporation reserves the right
to amend, alter, change or repeal any provision contained in this Certificate of
Incorporation, in the manner now or hereafter prescribed by statute and this
Certificate of Incorporation, and all rights conferred upon stockholders herein
are granted subject to this reservation.

ELEVENTH. This Article is inserted for the management of the business and for
the conduct of the affairs of the Corporation.

         1.       Number of Directors. The number of directors of the
Corporation shall not be less than three. The exact number of directors within
the limitations specified in the preceding sentence shall be fixed from time to
time by, or in the manner provided in, the Corporation's By-laws.

         2.       Classes of Directors. The Board of Directors shall be and is
divided into three classes: Class I, Class II and Class III. No one class shall
have more than one director more than any other class. If a fraction is
contained in the quotient arrived at by dividing the designated number of
directors by three, then, if such fraction is one-third, the extra director
shall be a member of Class I, and if such fraction is two-thirds, one of the
extra directors shall be a member of Class I and one of the extra directors
shall be a member of Class II, unless otherwise provided from time to time by
resolution adopted by the Board of Directors.

         3.       Election of Directors. Elections of directors need not be by
written ballot except as and to the extent provided in the By-laws of the
Corporation.

         4.       Terms of Office. Each director shall serve for a term ending
on the date of the third annual meeting following the annual meeting at which
such director was elected; provided, that each initial director in Class I shall
serve for a term ending on the date of the annual meeting in 2000; each initial
director in Class II shall serve for a term ending on the date of the annual
meeting in 2001; and each initial director in Class III shall serve for a term
ending on the date of the annual meeting in the year 2002; and provided further,
that the term of each director shall be subject to the election and
qualification of his successor and to his earlier death, resignation or removal.

         5.       Allocation of Directors Among Classes in the Event of
Increases or Decreases in the Number of Directors. In the event of any increase
or decrease in the authorized number of directors, (i) each director then
serving as such shall nevertheless continue as a director of the class of which
he is a member and (ii) the newly created or eliminated directorships resulting
from such increase or decrease shall be apportioned by the Board of Directors
among the three classes of directors so as to ensure that no one class has more
than one director more than any other class. To the extent possible, consistent
with the foregoing rule, any newly created directorships shall be added to those
classes whose terms of office are to expire at the latest dates following such
allocation, and any newly eliminated directorships shall be subtracted from
those classes whose terms of offices are to expire at the earliest dates
following such allocation, unless otherwise provided from time to time by
resolution adopted by the Board of Directors.

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         6.       Quorum; Action at Meeting. A majority of the directors at any
time in office shall constitute a quorum for the transaction of business. In the
event one or more of the directors shall be disqualified to vote at any meeting,
then the required quorum shall be reduced by one for each director so
disqualified, provided that in no case shall less than one-third of the number
of directors fixed pursuant to Section 1 above constitute a quorum. If at any
meeting of the Board of Directors there shall be less than such a quorum, a
majority of those present may adjourn the meeting from time to time. Every act
or decision done or made by a majority of the directors present at a meeting
duly held at which a quorum is present shall be regarded as the act of the Board
of Directors unless a greater number is required by law, by the By-laws of the
Corporation or by this Certificate of Incorporation.

         7.       Removal. Directors of the Corporation may be removed only for
cause by the affirmative vote of the holders of at least two-thirds of the
shares of the capital stock of the Corporation issued and outstanding and
entitled to vote.

         8.       Vacancies. Any vacancy in the Board of Directors, however
occurring, including a vacancy resulting from an enlargement of the size of the
Board of Directors, shall be filled only by a vote of a majority of the
directors then in office, although less than a quorum, or by a sole remaining
director. A director elected to fill a vacancy shall be elected to hold office
until the next election of the class for which such director shall have been
chosen, subject to the election and qualification of his successor and to his
earlier death, resignation or removal.

         9.       Stockholder Nominations and Introduction of Business, Etc.
Advance notice of stockholder nominations for election of directors and other
business to be brought by stockholders before a meeting of stockholders shall be
given in the manner provided by the By-laws of the Corporation.

         10.      Amendments to Article. Notwithstanding any other provisions of
law, this Certificate of Incorporation or the By-laws of the Corporation, and
notwithstanding the fact that a lesser percentage may be specified by law, the
affirmative vote of the holders of at least seventy-five percent (75%) of the
shares of capital stock of the Corporation issued and outstanding and entitled
to vote shall be required to amend or repeal, or to adopt any provision
inconsistent with, this Article ELEVENTH.

TWELFTH. Stockholders of the Corporation may not take any action by written
consent in lieu of a meeting. Notwithstanding any other provisions of law, the
Certificate of Incorporation or the By-Laws of the Corporation, and
notwithstanding the fact that a lesser percentage may be specified by law, the
affirmative vote of the holders of at least seventy-five percent (75%) of the
votes which all the stockholders would be entitled to cast in any annual
election of directors or class of directors shall be required to amend or
repeal, or to adopt any provision inconsistent with, this Article TWELFTH.

THIRTEENTH. Special meetings of stockholders may be called at any time by only
the Chairman of the Board of Directors, the Chief Executive Officer, President
or the Board of Directors. Business transacted at any special meeting of
stockholders shall be limited to matters relating to the purpose or purposes
stated in the notice of meeting. Notwithstanding any other provision of law,
this Certificate of Incorporation or the By-Laws of the Corporation, and
notwithstanding the fact that a lesser percentage may be specified by law, the
affirmative vote of the holders of at least seventy-five percent (75%) of the
votes which all the stockholders would be entitled to cast in any annual
election of directors or class of directors shall be required to amend or
repeal, or to adopt any provision inconsistent with, this Article THIRTEENTH.

<PAGE>

IN WITNESS WHEREOF, the Corporation has caused its corporate seal to be affixed
hereto and this Amended and Restated Certificate of Incorporation to be signed
by its President and Chief Executive Officer this 21st day of July, 1999.

                                      ART TECHNOLOGY GROUP, INC.

                                      By:   /s/ Jeet Singh
                                          -------------------------------------
                                             Jeet Singh
                                             President & Chief Executive Officer

<PAGE>

                            CERTIFICATE OF AMENDMENT
                           TO THE AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                                       OF
                           ART TECHNOLOGY GROUP, INC.

                         Pursuant to Section 242 of the
                    Corporation law of the State of Delaware

         ART TECHNOLOGY GROUP, INC. (the "Company"), organized and existing
under and by virtue of the General Corporation Law of the State of Delaware,
does hereby certify:

         That at a duly called meeting of the Board of Directors of the Company
at which a quorum was present at all times, a resolution was duly adopted,
pursuant to Sections 141(f) and 242 of the General Corporation Law of the State
of Delaware, setting forth an amendment of the Amended and Restated Certificate
of Incorporation of the Company and declaring said amendment to be advisable.
Said amendment was approved by the stockholders of the Company at a duly called
meeting at which a quorum was present at all times. The amendment is as follows:

That the Article FOURTH of the Amended and Restated Certificate of Incorporation
of the Company be further amended to increase the authorized number of shares of
the Company's Common Stock, $.01 par value per share (the "Common Stock"), from
100,000,000 to 500,000,000

         IN WITNESS WHEREOF, the Corporation has caused this Certificate of
Amendment to be signed by Paul G. Shorthose, its President, this 7th day of
June, 2000.

                                                     ART TECHNOLOGY GROUP, INC.

                                                     By:   /s/ Paul G. Shorthose
                                                          ----------------------
                                                       Paul G. Shorthose
                                                       President

<PAGE>

                           CERTIFICATE OF DESIGNATIONS

                                       OF

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       OF

                           ART TECHNOLOGY GROUP, INC.

Art Technology Group, Inc., a corporation organized and existing under the laws
of the State of Delaware (hereinafter called the "Corporation"), hereby
certifies that the following resolution was adopted by the Board of Directors of
the Corporation at a meeting duly called and held on September 26, 2001:

RESOLVED: That pursuant to the authority granted to and vested in the Board of
Directors of the Corporation (hereinafter called the "Board") in accordance with
the provisions of the Certificate of Incorporation, as amended, the Board hereby
creates a series of Preferred Stock, $.01 par value per share (the "Preferred
Stock"), of the Corporation and hereby states the designation and number of
shares, and fixes the relative rights, preferences and limitations thereof as
follows:

         SERIES A JUNIOR PARTICIPATING PREFERRED STOCK:

         Section 1. Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock" (the "Series A
Preferred Stock") and the number of shares constituting the Series A Preferred
Stock shall be Five Hundred Thousand (500,000). Such number of shares may be
increased or decreased by resolution of the Board prior to issuance; provided,
that no decrease shall reduce the number of shares of Series A Preferred Stock
to a number less than the number of shares then outstanding plus the number of
shares reserved for issuance upon the exercise of outstanding options, rights or
warrants or upon the conversion of any outstanding securities issued by the
Corporation convertible into Series A Preferred Stock.

<PAGE>

         Section 2. Dividends and Distributions.

         (A)      Subject to the rights of the holders of any shares of any
series of Preferred Stock (or any similar stock) ranking prior and superior to
the Series A Preferred Stock with respect to dividends, the holders of shares of
Series A Preferred Stock, in preference to the holders of Common Stock, par
value $.01 per share (the "Common Stock"), of the Corporation, and of any other
junior stock, shall be entitled to receive, when, as and if declared by the
Board out of funds of the Corporation legally available for the payment of
dividends, quarterly dividends payable in cash on the last day of each fiscal
quarter of the Corporation in each year (each such date being referred to herein
as a "Quarterly Dividend Payment Date"), commencing on the first Quarterly
Dividend Payment Date after the first issuance of a share or fraction of a share
of Series A Preferred Stock, in an amount per share (rounded to the nearest
cent) equal to the greater of (a) $10 or (b) subject to the provision for
adjustment hereinafter set forth, 1000 times the aggregate per share amount of
all cash dividends, and 1000 times the aggregate per share amount (payable in
kind) of all non-cash dividends or other distributions, other than a dividend
payable in shares of Common Stock or a subdivision of the outstanding shares of
Common Stock (by reclassification or otherwise), declared on the Common Stock
since the immediately preceding Quarterly Dividend Payment Date or, with respect
to the first Quarterly Dividend Payment Date, since the first issuance of any
share or fraction of a share of Series A Preferred Stock. In the event the
Corporation shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision, combination or
consolidation of the outstanding shares of Common Stock (by reclassification or
otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount to which holders of shares of Series A Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event. In the event the Corporation shall
at any time declare or pay any dividend on the Series A Preferred Stock payable
in shares of Series A Preferred Stock, or effect a subdivision, combination or
consolidation of the outstanding shares of Series A Preferred Stock (by
reclassification or otherwise than by payment of a dividend in shares of Series
A Preferred Stock) into a greater or lesser number of shares of Series A
Preferred Stock, then in each such case the amount to which holders of shares of
Series A Preferred Stock were entitled immediately prior to such event under
clause (b) of the first sentence of this Section 2(A) shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Series A Preferred Stock that were outstanding immediately prior to
such event and the denominator of which is the number of shares of Series A
Preferred Stock outstanding immediately after such event.

         (B)      The Corporation shall declare a dividend or distribution on
the Series A Preferred Stock as provided in paragraph (A) of this Section
immediately after it declares a dividend or distribution on the Common Stock
(other than a dividend payable in shares of Common Stock) and the Corporation
shall pay such dividend or distribution on the Series A Preferred Stock before
the dividend or distribution declared on the Common Stock is paid or set apart;
provided that, in the event no dividend or distribution shall have been declared
on the Common Stock during the period between any Quarterly Dividend Payment
Date and the next subsequent Quarterly Dividend Payment Date, a dividend of $10
per share on the Series A Preferred Stock shall nevertheless be payable on such
subsequent Quarterly Dividend Payment Date.

<PAGE>

         (C)      Dividends shall begin to accrue and be cumulative on
outstanding shares of Series A Preferred Stock from the Quarterly Dividend
Payment Date next preceding the date of issue of such shares, unless the date of
issue of such shares is prior to the record date for the first Quarterly
Dividend Payment Date, in which case dividends on such shares shall begin to
accrue from the date of issue of such shares, or unless the date of issue is a
Quarterly Dividend Payment Date or is a date after the record date for the
determination of holders of shares of Series A Preferred Stock entitled to
receive a quarterly dividend and before such Quarterly Dividend Payment Date, in
either of which events such dividends shall begin to accrue and be cumulative
from such Quarterly Dividend Payment Date. Accrued but unpaid dividends shall
not bear interest. Dividends paid on the shares of Series A Preferred Stock in
an amount less than the total amount of such dividends at the time accrued and
payable on such shares shall be allocated pro rata on a share-by-share basis
among all such shares at the time outstanding. The Board may fix a record date
for the determination of holders of shares of Series A Preferred Stock entitled
to receive payment of a dividend or distribution declared thereon, which record
date shall be not more than 60 days prior to the date fixed for the payment
thereof.

         Section 3. Voting Rights. The holders of shares of Series A Preferred
Stock shall have the following voting rights:

         (A)      Subject to the provision for adjustment hereinafter set forth,
each share of Series A Preferred Stock shall entitle the holder thereof to 1000
votes on all matters submitted to a vote of the stockholders of the Corporation.
In the event the Corporation shall at any time declare or pay any dividend on
the Common Stock payable in shares of Common Stock, or effect a subdivision,
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the number of votes per share to which holders of shares of Series A
Preferred Stock were entitled immediately prior to such event shall be adjusted
by multiplying such number by a fraction, the numerator of which is the number
of shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event. In the event the Corporation shall
at any time declare or pay any dividend on the Series A Preferred Stock payable
in shares of Series A Preferred Stock, or effect a subdivision, combination or
consolidation of the outstanding shares of Series A Preferred Stock (by
reclassification or otherwise than by payment of a dividend in shares of Series
A Preferred Stock) into a greater or lesser number of shares of Series A
Preferred Stock, then in each such case the number of votes per share to which
holders of shares of Series A Preferred Stock were entitled immediately prior to
such event shall be adjusted by multiplying such amount by a fraction, the
numerator of which is the number of shares of Series A Preferred Stock that were
outstanding immediately prior to such event and the denominator of which is the
number of shares of Series A Preferred Stock outstanding immediately after such
event.

         (B)      Except as otherwise provided herein, in the Certificate of
Incorporation or by law, the holders of shares of Series A Preferred Stock and
the holders of shares of Common Stock and any other capital stock of the
Corporation having general voting rights shall vote together as one class on all
matters submitted to a vote of stockholders of the Corporation.

<PAGE>

         (C)               (i)      If at any time dividends on any Series A
Preferred Stock shall be in arrears in an amount equal to six quarterly
dividends thereon, the holders of the Series A Preferred Stock, voting as a
separate series from all other series of Preferred Stock and classes of capital
stock, shall be entitled to elect two members of the Board in addition to any
Directors elected by any other series, class or classes of securities and the
authorized number of Directors will automatically be increased by two. Promptly
thereafter, the Board of the Corporation shall, as soon as may be practicable,
call a special meeting of holders of Series A Preferred Stock for the purpose of
electing such members of the Board. Such special meeting shall in any event be
held within 45 days of the occurrence of such arrearage.

                           (ii)     During any period when the holders of Series
                  A Preferred Stock, voting as a separate series, shall be
                  entitled and shall have exercised their right to elect two
                  Directors, then, and during such time as such right continues,
                  (a) the then authorized number of Directors shall be increased
                  by two, and the holders of Series A Preferred Stock, voting as
                  a separate series, shall be entitled to elect the additional
                  Directors so provided for, and (b) each such additional
                  Director shall not be a member of any existing class of the
                  Board, but shall serve until the next annual meeting of
                  stockholders for the election of Directors, or until his
                  successor shall be elected and shall qualify, or until his
                  right to hold such office terminates pursuant to the
                  provisions of this Section 3(C).

                           (iii)    A Director elected pursuant to the terms
                  hereof may be removed with or without cause by the holders of
                  Series A Preferred Stock entitled to vote in an election of
                  such Director.

                           (iv).....If, during any interval between annual
                  meetings of stockholders for the election of Directors and
                  while the holders of Series A Preferred Stock shall be
                  entitled to elect two Directors, there is no such Director in
                  office by reason of resignation, death or removal, then,
                  promptly thereafter, the Board shall call a special meeting of
                  the holders of Series A Preferred Stock for the purpose of
                  filling such vacancy and such vacancy shall be filled at such
                  special meeting. Such special meeting shall in any event be
                  held within 45 days of the occurrence of such vacancy.

                           (v)      At such time as the arrearage is fully
                  cured, and all dividends accumulated and unpaid on any shares
                  of Series A Preferred Stock outstanding are paid, and, in
                  addition thereto, at least one regular dividend has been paid
                  subsequent to curing such arrearage, the term of office of any
                  Director elected pursuant to this Section 3(C), or his
                  successor, shall automatically terminate, and the authorized
                  number of Directors shall automatically decrease by two, the
                  rights of the holders of the shares of the Series A Preferred
                  Stock to vote as provided in this Section 3(C) shall cease,
                  subject to renewal from time to time upon the same terms and
                  conditions, and the holders of shares of the Series A
                  Preferred Stock shall have only the limited voting rights
                  elsewhere herein set forth.

<PAGE>

         (D)      Except as set forth herein, or as otherwise provided by law,
holders of Series A Preferred Stock shall have no special voting rights and
their consent shall not be required (except to the extent they are entitled to
vote with holders of Common Stock as set forth herein) for taking any corporate
action.

         Section 4. Certain Restrictions.

         (A) Whenever quarterly dividends or other dividends or distributions
payable on the Series A Preferred Stock as provided in Section 2 are in arrears,
thereafter and until all accrued and unpaid dividends and distributions, whether
or not declared, on shares of Series A Preferred Stock outstanding shall have
been paid in full, the Corporation shall not:

                           (i)      declare or pay dividends, or make any other
                  distributions, on any shares of stock ranking junior (either
                  as to dividends or upon liquidation, dissolution or winding
                  up) to the Series A Preferred Stock;

                           (ii)     declare or pay dividends, or make any other
                  distributions, on any shares of stock ranking on a parity
                  (either as to dividends or upon liquidation, dissolution or
                  winding up) with the Series A Preferred Stock, except
                  dividends paid ratably on the Series A Preferred Stock and all
                  such parity stock on which dividends are payable or in arrears
                  in proportion to the total amounts to which the holders of all
                  such shares are then entitled;

                           (iii)    redeem or purchase or otherwise acquire for
                  consideration shares of any stock ranking junior (either as to
                  dividends or upon liquidation, dissolution or winding up) to
                  the Series A Preferred Stock, provided that the Corporation
                  may at any time redeem, purchase or otherwise acquire shares
                  of any such junior stock in exchange for shares of any stock
                  of the Corporation ranking junior (either as to dividends or
                  upon dissolution, liquidation or winding up) to the Series A
                  Preferred Stock; or

                           (iv)     redeem or purchase or otherwise acquire for
                  consideration any shares of Series A Preferred Stock, or any
                  shares of stock ranking on a parity with the Series A
                  Preferred Stock, except in accordance with a purchase offer
                  made in writing or by publication (as determined by the Board)
                  to all holders of such shares upon such terms as the Board,
                  after consideration of the respective annual dividend rates
                  and other relative rights and preferences of the respective
                  series and classes, shall determine in good faith will result
                  in fair and equitable treatment among the respective series or
                  classes.

         (B) The Corporation shall not permit any subsidiary of the Corporation
to purchase or otherwise acquire for consideration any shares of stock of the
Corporation unless the Corporation could, under paragraph (A) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

         Section 5. Reacquired Shares. Any shares of Series A Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof. All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
subject to the conditions and restrictions on issuance set forth herein, in the
Certificate of Incorporation, or in any other Certificate of Designations
creating a series of Preferred Stock or any similar stock or as otherwise
required by law.

<PAGE>

         Section 6.  Liquidation, Dissolution or Winding Up.

         (A) Upon any liquidation, dissolution or winding up of the Corporation,
no distribution shall be made (1) to the holders of shares of stock ranking
junior (either as to dividends or upon liquidation, dissolution or winding up)
to the Series A Preferred Stock unless, prior thereto, the holders of shares of
Series A Preferred Stock shall have received $1000 per share, plus an amount
equal to accrued and unpaid dividends and distributions thereon, whether or not
declared, to the date of such payment, provided that the holders of shares of
Series A Preferred Stock shall be entitled to receive an aggregate amount per
share, subject to the provision for adjustment hereinafter set forth, equal to
1000 times the aggregate amount to be distributed per share to holders of shares
of Common Stock, or (2) to the holders of shares of stock ranking on a parity
(either as to dividends or upon liquidation, dissolution or winding up) with the
Series A Preferred Stock, except distributions made ratably on the Series A
Preferred Stock and all such parity stock in proportion to the total amounts to
which the holders of all such shares are entitled upon such liquidation,
dissolution or winding up.

         (B) Neither the consolidation, merger or other business combination of
the Corporation with or into any other corporation nor the sale, lease, exchange
or conveyance of all or any part of the property, assets or business of the
Corporation shall be deemed to be a liquidation, dissolution or winding up of
the Corporation for purposes of this Section 6.

         (C) In the event the Corporation shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect a
subdivision, combination or consolidation of the outstanding shares of Common
Stock (by reclassification or otherwise than by payment of a dividend in shares
of Common Stock) into a greater or lesser number of shares of Common Stock, then
in each such case the aggregate amount to which holders of shares of Series A
Preferred Stock were entitled immediately prior to such event under the proviso
in clause (1) of paragraph (A) of this Section 6 shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event. In the event the Corporation shall
at any time declare or pay any dividend on the Series A Preferred Stock payable
in shares of Series A Preferred Stock, or effect a subdivision, combination or
consolidation of the outstanding shares of Series A Preferred Stock (by
reclassification or otherwise than by payment of a dividend in shares of Series
A Preferred Stock) into a greater or lesser number of shares of Series A
Preferred Stock, then in each such case the aggregate amount to which holders of
shares of Series A Preferred Stock were entitled immediately prior to such event
under the proviso in clause (1) of paragraph (A) of this Section 6 shall be
adjusted by multiplying such amount by a fraction, the numerator of which is the
number of shares of Series A Preferred Stock that were outstanding immediately
prior to such event and the denominator of which is the number of shares of
Series A Preferred Stock outstanding immediately after such event.

<PAGE>

         Section 7. Consolidation, Merger, etc. Notwithstanding anything to the
contrary contained herein, in case the Corporation shall enter into any
consolidation, merger, combination or other transaction in which the shares of
Common Stock are exchanged for or changed into other stock or securities, cash
and/or any other property, then in any such case each share of Series A
Preferred Stock shall at the same time be similarly exchanged or changed into an
amount per share, subject to the provision for adjustment hereinafter set forth,
equal to 1,000 times the aggregate amount of stock, securities, cash and/or any
other property (payable in kind), as the case may be, into which or for which
each share of Common Stock is changed or exchanged. In the event the Corporation
shall at any time declare or pay any dividend on the Common Stock payable in
shares of Common Stock, or effect a subdivision, combination or consolidation of
the outstanding shares of Common Stock (by reclassification or otherwise than by
payment of a dividend in shares of Common Stock) into a greater or lesser number
of shares of Common Stock, then in each such case the amount set forth in the
preceding sentence with respect to the exchange or change of shares of Series A
Preferred Stock shall be adjusted by multiplying such amount by a fraction, the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event. In
the event the Corporation shall at any time declare or pay any dividend on the
Series A Preferred Stock payable in shares of Series A Preferred Stock, or
effect a subdivision, combination or consolidation of the outstanding shares of
Series A Preferred Stock (by reclassification or otherwise than by payment of a
dividend in shares of Series A Preferred Stock) into a greater or lesser number
of shares of Series A Preferred Stock, then in each such case the amount set
forth in the first sentence of this Section 7 with respect to the exchange or
change of shares of Series A Preferred Stock shall be adjusted by multiplying
such amount by a fraction, the numerator of which is the number of shares of
Series A Preferred Stock that were outstanding immediately prior to such event
and the denominator of which is the number of shares of Series A Preferred Stock
outstanding immediately after such event.

         Section 8. No Redemption. The shares of Series A Preferred Stock shall
not be redeemable.

         Section 9. Rank. The Series A Preferred Stock shall rank, with respect
to the payment of dividends and the distribution of assets, junior to all series
of any other class of the Preferred Stock issued either before or after the
issuance of the Series A Preferred Stock, unless the terms of any such series
shall provide otherwise.

         Section 10. Amendment. At such time as any shares of Series A Preferred
Stock are outstanding, the Certificate of Incorporation, as amended, of the
Corporation shall not be amended in any manner which would materially alter or
change the powers, preferences or special rights of the Series A Preferred Stock
so as to affect them adversely without the affirmative vote of the holders of at
least two-thirds of the outstanding shares of Series A Preferred Stock, voting
together as a single class.

         Section 11. Fractional Shares. Series A Preferred Stock may be issued
in fractions of a share which shall entitle the holder, in proportion to such
holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and have the benefit of all other rights of holders
of Series A Preferred Stock.

<PAGE>

         IN WITNESS WHEREOF, this Certificate of Designations is executed on
behalf of the Corporation by its Chairman of the Board this 28th day of
September, 2001.

                                             ART TECHNOLOGY GROUP, INC.

                                             By: /s/ Joseph T. Chung
                                                 -------------------
                                             Chief Technology Officer, Treasurer
                                             and Chairman of the Board

<PAGE>

                            CERTIFICATE OF AMENDMENT
                                       OF
                              AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                                       OF
                           ART TECHNOLOGY GROUP, INC.

         Art Technology Group, Inc. (the "Corporation"), a corporation organized
and existing under and by virtue of the Delaware General Corporation Law, does
hereby certify as follows:

         FIRST: That the Board of Directors of the Corporation adopted a
resolution pursuant to Section 242 of the Delaware General Corporation Law
proposing and declaring advisable that the first paragraph of Article FOURTH of
the Amended and Restated Certificate of Incorporation of the Corporation, as
amended, be amended to read in its entirety as follows:

                  FOURTH: The total number of shares of all classes of stock
which the Corporation shall have authority to issue is 210,000,000 shares,
consisting of (i) 200,000,000 shares of Common Stock, $.01 par value per share
("Common Stock"), and (ii) 10,000,000 shares of Preferred Stock, $.01 par value
per share ("Preferred Stock").

         SECOND: That the foregoing amendment to the Amended and Restated
Certificate of Incorporation of the Corporation, as amended, was adopted by the
holders of a majority of the outstanding shares of Common Stock at the Annual
Meeting of Shareholders of the Corporation held on May 21, 2003 pursuant to
notice duly given.

* * *

<PAGE>

         IN WITNESS WHEREOF, Art Technology Group, Inc. has caused this
Certificate to be signed by its Chief Executive Officer and President on June 6,
2003.

                                       ART TECHNOLOGY GROUP, INC.

                                       By: /s/ Robert D. Burke
                                           -------------------
                                           Robert D. Burke
                                           Chief Executive Officer and President<PAGE>

                                                                    EXHIBIT 10.1

                           ART TECHNOLOGY GROUP, INC.

                              AMENDED AND RESTATED
                     1999 OUTSIDE DIRECTOR STOCK OPTION PLAN

1.       Purpose

         The purpose of this Amended and Restated 1999 Outside Director Stock
Option Plan (the "Plan") of Art Technology Group, Inc., a Delaware corporation
(the "Company"), is to advance the interests of the Company's stockholders by
enhancing the Company's ability to attract, retain and motivate outside
directors of the Company by providing such directors with equity ownership
opportunities and performance-based incentives and thereby better aligning the
interests of such persons with those of the Company's stockholders.

2.       Eligibility

         Each director of the Company who is not an employee of the Company (an
"Eligible Director") is eligible to be granted options (an "Option") under the
Plan. Any person who has been granted an Option under the Plan shall be deemed a
"Participant."

3.       Administration, Delegation

         The Plan will be administered by the Board of Directors of the Company
(the "Board"). The Board shall have authority to adopt, amend and repeal such
administrative rules, guidelines and practices relating to the Plan as it shall
deem advisable. The Board may correct any defect, supply any omission or
reconcile any inconsistency in the Plan or any Option in the manner and to the
extent it shall deem expedient to carry the Plan into effect and it shall be the
sole and final judge of such expediency. All decisions by the Board shall be
made in the Board's sole discretion and shall be final and binding on all
persons having or claiming any interest in the Plan or in any Option. No
director or person acting pursuant to the authority delegated by the Board shall
be liable for any action or determination relating to or under the Plan made in
good faith.

4.       Stock Available for Options

         a.       Number of Shares. Subject to adjustment under Section 4(b),
Options may be made under the Plan for up to 800,000 shares of common stock,
$.01 par value per share, of the Company (the "Common Stock"). If any Option
expires or is terminated, surrendered or canceled without having been fully
exercised or is forfeited in whole or in part or results in any Common Stock not
being issued, the unused Common Stock covered by such Option shall again be
available for the grant of Options under the Plan. Shares issued under the Plan
may consist in whole or in part of authorized but unissued shares or treasury
shares.

         b.       Adjustment to Common Stock. In the event of any stock split,
stock dividend, recapitalization, reorganization, merger, consolidation,
combination, exchange of shares, liquidation, spin-off or other similar change
in capitalization or event, or any distribution to holders of Common Stock other
than a normal cash dividend, (i) the number and class of securities available
under this Plan, (ii) the number and class of securities and exercise price per
share subject to each outstanding Option, and (iii) the number and class of
securities available for automatic grants shall be appropriately adjusted by the
Company (or substituted Options may be made, if applicable) to the extent the
Board shall determine, in good faith, that such an adjustment (or substitution)
is necessary and appropriate. If this Section 4(b) applies and Section 6(c) also
applies to any event, Section 6(c) shall be applicable to such event, and this
Section 4(b) shall not be applicable.

<PAGE>

5.       Stock Options

         a.       Grants. The Board may grant Options and determine the number
of shares of Common Stock to be covered by each Option and the conditions and
limitations applicable to the exercise of each Option, including conditions
relating to applicable federal or state securities laws, as it considers
necessary or advisable. None of the Options granted hereunder are intended to be
Incentive Stock Options as defined in Section 422 of the Internal Revenue Code
of 1986, as amended, and any regulations promulgated thereunder.

         b.       Option Exercise Price. The option exercise price per share for
each Option granted under the Plan shall equal (i) the last reported sales price
per share of the Company's Common Stock as listed on a nationally recognized
securities exchange or the Nasdaq National Market, as the case may be, on the
date of grant (or, if no such price is reported on such date, such price as
reported on the nearest preceding day); or (ii) the fair market value of the
stock on the date of grant, as determined by the Board of Directors, if the
Common Stock is not publicly traded. Notwithstanding the preceding sentence, the
option exercise price per share for each Option granted as of the Effective Date
of the initial public offering shall be the price per share for which the Common
Stock was offered to the public.

         c.       Exercise Period. No Option may be exercised more than one year
after the Participant ceases to serve as a director of the Company. No Option
shall be exercisable after the expiration of ten (10) years from the date of
grant or prior to approval of the Plan by the stockholders of the Company.

         d.       Payment Upon Exercise. Common Stock purchased upon the
exercise of an Option granted under the Plan shall be paid for as follows:

                  i.       in cash or by check, payable to the order of the
Company;

                  ii.      except as the Board may otherwise provide in an
Option Agreement, by delivery of an irrevocable and unconditional undertaking by
a creditworthy broker to deliver promptly to the Company sufficient funds to pay
the exercise price, or by delivery by the Participant to the Company of a copy
of irrevocable and unconditional instructions to a creditworthy broker to
deliver promptly to the Company cash or a check sufficient to pay the exercise
price;

                  iii.     to the extent permitted by the Board and explicitly
provided in an Option Agreement (i) by delivery of shares of Common Stock owned
by the Participant valued at their fair market value as determined by the Board
in good faith ("Fair Market Value"), which Common Stock was owned by the
Participant at least six months prior to such delivery, (ii) by delivery of a
promissory note of the Participant to the Company on terms determined by the
Board, or (iii) by payment of such other lawful consideration as the Board may
determine; or

                  iv.      by any combination of the above permitted forms of
payment.

6.       General Provisions Applicable to Options

         a.       Transferability of Options. Except as the Board may otherwise
determine or provide in an Option, Options shall not be sold, assigned,
transferred, pledged or otherwise encumbered by the person to whom they are
granted, either voluntarily or by operation of law, except by will or the laws
of descent and distribution, and, during the life of the Participant, shall be
exercisable only by the Participant. References to a Participant, to the extent
relevant in the context, shall include references to authorized transferees.

         b.       Documentation. Each Option under the Plan shall be evidenced
by a written instrument in such form as the Board shall determine. Each Option
may contain terms and conditions in addition to those set forth in the Plan.

<PAGE>

         c.       Acquisition Events. The Company shall give the Participant ten
(10) days notice of an Acquisition Event (as defined below), and the Option
shall expire upon the Acquisition Event. An "Acquisition Event" shall mean: (a)
any merger or consolidation which results in the voting securities of the
Company outstanding immediately prior thereto representing immediately
thereafter (either by remaining outstanding or by being converted into voting
securities of the surviving or acquiring entity) less than 50% of the combined
voting power of the voting securities of the Company or such surviving or
acquiring entity outstanding immediately after such merger or consolidation; (b)
any sale of all or substantially all of the assets of the Company; or (c) the
complete liquidation of the Company.

         d.       Conditions on Delivery of Stock. The Company will not be
obligated to deliver any shares of Common Stock pursuant to the Plan or to
remove restrictions from shares previously delivered under the Plan until (i)
all conditions of the Option have been met or removed to the satisfaction of the
Company, (ii) in the opinion of the Company's counsel, all other legal matters
in connection with the issuance and delivery of such shares have been satisfied,
including any applicable securities laws and any applicable stock exchange or
stock market rules and regulations, and (iii) the Participant has executed and
delivered to the Company such representations or agreements as the Company may
consider appropriate to satisfy the requirements of any applicable laws, rules
or regulations.

7.       Miscellaneous

         a.       No Right To Board Membership or Other Status. Neither the Plan
nor the granting of an Option shall be construed as giving a Participant the
right to continue as a director of the Company.

         b.       No Rights As Stockholder. Subject to the provisions of the
applicable Options, no Participant or beneficiary designated by the Participant
shall have any rights as a stockholder with respect to any shares of Common
Stock to be distributed with respect to an Option until becoming the record
holder of such shares.

         c.       Effective Date and Term of Plan. The Plan shall become
effective on the date on which it is adopted by the Board. No Options shall be
granted under the Plan after the completion of ten years from the date on which
the Plan was adopted by the Board, but Options previously granted may extend
beyond that date.

         d.       Amendment of Plan. The Board may amend, suspend or terminate
the Plan or any portion thereof at any time.

         e.       Governing Law. The provisions of the Plan and all Options made
hereunder shall be governed by and interpreted in accordance with the laws of
the State of Delaware, without regard to any applicable conflicts of law.

<PAGE>

                           ART TECHNOLOGY GROUP, INC.

                       Nonstatutory Stock Option Agreement
 Granted Under the Amended and Restated 1999 Outside Director Stock Option Plan

1.       Grant of Option.

This agreement evidences the grant by Art Technology Group, Inc., a Delaware
         corporation (the "Company"), on [  , ____] (the "Grant Date") to
         [    ], a director of the Company (the "Participant"), of an option to
         purchase, in whole or in part, on the terms provided herein and in the
         Company's Amended and Restated 1999 Outside Director Stock Option Plan
         (the "Plan"), a total of [    ] shares of common stock, $.01 par value
         per share, of the Company ("Common Stock") (the "Shares") at $[    ]
         per Share. Unless earlier terminated, this option shall expire on the
         tenth anniversary of the Grant Date (the "Final Exercise Date").

It is intended that the option evidenced by this agreement shall not be an
         incentive stock option as defined in Section 422 of the Internal
         Revenue Code of 1986, as amended, and any regulations promulgated
         thereunder (the "Code"). Except as otherwise indicated by the context,
         the term "Participant," as used in this option, shall be deemed to
         include any person who acquires the right to exercise this option
         validly under its terms.

2.       Vesting Schedule.

This option will become exercisable ("vest") as to 100% of the original number
         of Shares on the Grant Date. This option shall expire upon, and will
         not be exercisable after, the Final Exercise Date.

The right of exercise shall be cumulative so that to the extent the option is
         not exercised in any period to the maximum extent permissible it shall
         continue to be exercisable, in whole or in part, with respect to all
         shares for which it is vested until the earlier of the Final Exercise
         Date or the termination of this option under Section 3 hereof or the
         Plan.

3.       Exercise of Option.

a.       Form of Exercise. Each election to exercise this option shall be in
         writing, signed by the Participant, and received by the Company at its
         principal office, accompanied by this agreement, and payment in full in
         the manner provided in the Plan. The Participant may purchase less than
         the number of shares covered hereby, provided that no partial exercise
         of this option may be for any fractional share.

b.       Exercise Period. Each Option shall immediately vest and be exercisable.
         In addition, no Option may be exercised more than one year after the
         Participant ceases to serve as a director of the Company. No Option
         shall be exercisable after the expiration of ten (10) years from the
         date of grant or prior to approval of the Plan by the stockholders of
         the Company.

4.       Nontransferability of Option.

This option may not be sold, assigned, transferred, pledged or otherwise
         encumbered by the Participant, either voluntarily or by operation of
         law, except by will or the laws of descent and distribution, and,
         during the lifetime of the Participant, this option shall be
         exercisable only by the Participant.

5.       Provisions of the Plan.

This option is subject to the provisions of the Plan, a copy of which is
         furnished to the Participant with this option.

<PAGE>

IN WITNESS WHEREOF, the Company has caused this option to be executed under its
         corporate seal by its duly authorized officer. This option shall take
         effect as a sealed instrument.

                                                     ART TECHNOLOGY GROUP, INC.

Dated: ______________________                   By: ____________________________

                                                Name:___________________________

                                                Title:__________________________

<PAGE>

                            PARTICIPANT'S ACCEPTANCE

The undersigned hereby accepts the foregoing option and agrees to the terms and
conditions thereof. The undersigned hereby acknowledges receipt of a copy of the
Art Technology Group, Inc. 1999 Outside Director Stock Option Plan.

                                             PARTICIPANT:

                                             ___________________________________
                                             Name:    __________________________
                                             Address: __________________________
                                                      __________________________
                                                      __________________________

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