<PAGE>

                                                                  Exhibit 10.36

                            BREAKAWAY SOLUTIONS, INC.

                        INCENTIVE STOCK OPTION AGREEMENT
                     GRANTED UNDER 1999 STOCK INCENTIVE PLAN

         1.  GRANT OF OPTION.

         This agreement evidences the grant by Breakaway Solutions, Inc., a
Delaware corporation (the "Company"), on December 10, 1999 (the "Grant Date")
to Gordon Brooks, an employee 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 1999 Stock Incentive Plan (the "Plan"), a total of 6,965 shares
(the "Shares") of common stock, $0.000125 par value per share, of the Company
("Common Stock") at $57.53 per Share. Unless earlier terminated, this option
shall expire on December 10, 2009 (the "Final Exercise Date").

         It is intended that the option evidenced by this agreement shall 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; CHANGE IN CONTROL.

         This option will become exercisable ("vest") as to 25% of the original
number of Shares on the first anniversary of the Grant Date and as to an
additional 6.25% of the original number of Shares at the end of each successive
three-month period following the first anniversary of the Grant Date until the
fifth anniversary of the Grant 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.

         In the case of and subject to the consummation of (i) the dissolution
or liquidation of the Company, (ii) the sale of all or substantially all of the
assets of the Company on a consolidated basis to an unrelated person or entity,
(iii) a merger, reorganization or consolidation in which the holders of the
Company's outstanding voting power immediately prior to such transaction do not
own a majority of the outstanding voting power of the surviving or resulting
entity immediately upon completion of such transaction, (iv) the sale of all of
the capital stock of the Company to an unrelated person or entity, or (v) any
other transaction in which the owners of the Company's outstanding voting power
prior to such transaction do not own at least a majority of the outstanding
voting power of the relevant entity after the transaction (in each case,
regardless of
<PAGE>

the form thereof, a "Sale Event"), all Shares as of the effective date of the
Sale Event shall automatically become vested and immediately exercisable as of
such date.

         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 or for fewer than ten whole shares.

         (b) CONTINUOUS RELATIONSHIP WITH THE COMPANY REQUIRED. Except as
otherwise provided in this Section 3, this option may not be exercised unless
the Participant, at the time he or she exercises this option, is, and has been
at all times since the Grant Date, an employee, officer or director of, or
consultant or advisor to, the Company or any parent or subsidiary of the Company
as defined in Section 424(e) or (f) of the Code (an "Eligible Participant").

         (c) TERMINATION OF RELATIONSHIP WITH THE COMPANY. If the Participant
ceases to be an Eligible Participant for any reason, then, except as provided in
paragraphs (d) and (e) below, the right to exercise this option shall terminate
three months after such cessation (but in no event after the Final Exercise
Date), PROVIDED, THAT, this option shall be exercisable only to the extent that
the Participant was entitled to exercise this option on the date of such
cessation. Notwithstanding the foregoing, if the Participant, prior to the Final
Exercise Date, violates the non-competition or confidentiality provisions of any
employment contract, confidentiality and nondisclosure agreement or other
agreement between the Participant and the Company, the right to exercise this
option shall terminate immediately upon such violation.

         (d) EXERCISE PERIOD UPON DEATH OR DISABILITY. If the Participant dies
or becomes disabled (within the meaning of Section 22(e)(3) of the Code) prior
to the Final Exercise Date while he or she is an Eligible Participant and the
Company has not terminated such relationship for "cause" as specified in
paragraph (e) below, this option shall be exercisable, within the period of one
year following the date of death or disability of the Participant by the
Participant, PROVIDED, THAT, this option shall be exercisable only to the extent
that this option was exercisable by the Participant on the date of his or her
death or disability, and further provided that this option shall not be
exercisable after the Final Exercise Date.

         (e) DISCHARGE FOR CAUSE. If the Participant, prior to the Final
Exercise Date, is discharged by the Company for "cause" (as defined below), the
right to exercise this option shall terminate immediately upon the effective
date of such discharge. "Cause" shall mean willful misconduct by the Participant
or willful failure by the Participant to perform his or her responsibilities to
the Company (including, without limitation, breach by the Participant of any
provision of any employment, consulting, advisory, nondisclosure,
non-competition or other similar agreement between the Participant and the
Company), as determined by the Company, which determination shall be conclusive.
The Participant shall be considered to have been discharged for "Cause" if the
Company determines, within 30 days after the Participant's resignation, that
discharge for cause was warranted.


                                      -2-
<PAGE>

         4.  WITHHOLDING.

         No Shares will be issued pursuant to the exercise of this option unless
and until the Participant pays to the Company, or makes provision satisfactory
to the Company for payment of, any federal, state or local withholding taxes
required by law to be withheld in respect of this option.

         5.  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.

         6.  DISQUALIFYING DISPOSITION.

         If the Participant disposes of Shares acquired upon exercise of this
option within two years from the Grant Date or one year after such Shares were
acquired pursuant to exercise of this option, the Participant shall notify the
Company in writing of such disposition.

         7.  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.

         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.

                                        BREAKAWAY SOLUTIONS, INC.

Dated: December 11, 1999             By: /s/ Sam Spector
                                        --------------------------------
                                        Name: Sam Spector
                                        Title: Director - HR


                                      -3-
<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
Company's 1999 Stock Incentive Plan.

                                      PARTICIPANT:

                                      /s/  Gordon Brooks
                                      -----------------------------
                                           Gordon Brooks

                                      Address: _____________________

                                               _____________________


                                      -4-