Document:

<PAGE>
                                                                   EXHIBIT 10.22

December 6, 2001

Mr. Jim Weil
President and Chief Executive Officer
Calico Commerce, Inc.
333 West San Carlos Street
San Jose, CA 95011

RE: First Amendment to Financial Services Arrangement Between David Powell,
    Inc. and Calico Commerce, Inc.

This First Amendment sets forth certain amendments to the Management Service
Agreement between David Powell, Inc., a California corporation ("DPI"), and
Calico Commerce, Inc. ("Calico"), dated February 22, 2001, (the "Original
Agreement"). Except for the amendments expressly contained herein, the Original
Agreement shall remain in full force and effect.

TERM OF AGREEMENT:

     The total term of the agreement shall be extended to February 28, 2002, as
     described below. The Non-Cancelable Period, as described below, extends to
     January 31, 2002. Calico may discharge DPI at any time after the
     Non-Cancelable Period provided that Calico has delivered a 30-day written
     notice of intent to cancel this agreement.

WORK PRODUCT:

DPI has agreed to continue to provide the financial services including:

     - Managing the finance and administrative staff.
     - Serving as a sounding board to management and the Board of Directors.
     - Continue to participate in the Company's strategic transactions.

These services will be provided by Les Wright based on his allocation of 1/2 of
each workweek to Calico.
<PAGE>
December 6, 2001
Mr. Jim Weil
President and Chief Executive Officer
Calico Commerce, Inc.

Page 2

Fees:

     Calico has agreed to pay DPI $40,000 upon signing of this amendment for
     fees due for the Non-Cancelable Period described above. It is further
     agreed that this payment is earned in full upon receipt by DPI due to the
     non-cancelable nature of the services to be provided, and it is
     non-refundable.

     It is agreed and understood that at the end of the Non-Cancelable Period,
     if DPI continues to provide services with reduced staff, the fees of
     $20,000 per month will be payable in semi-monthly increments, each to be
     paid in advance of each DPI standard semi-monthly billing period, and that
     failure to pay such payments when due shall constitute a breach of this
     agreement by Calico.

Except for the additional term of agreement, work product and fees expressly
contained herein, the Original Agreement shall remain in full force and effect.

                                      ###

Yours truly,

/s/ Michael W. Scott
David Powell, Inc.
Michael W. Scott
President
Financial Services Division

/s/ J. B. WEIL
James B. Weil
CEO<PAGE>
                                                                   EXHIBIT 10.23

December 6, 2001

Mr. William D. Unger
On behalf of The Board of Directors
Calico Commerce, Inc.
333 West San Carlos Street
San Jose, CA 95011

RE:  First Amendment to Management Services Agreement between Regent Pacific
     Management Corporation and Calico Commerce, Inc.

Dear Mr. Unger:

This First Amendment sets forth certain amendments to the Management Service
Agreement between Regent Pacific Management Corporation, a California
corporation ("Regent Pacific"), and Calico Commerce, Inc. ("Calico"), dated
July 31, 2001, (the "Original Agreement"). Except for the amendments expressly
contained herein, the Original Agreement shall remain in full force and effect.

TERM OF AGREEMENT:

     The total term of the agreement shall be extended to July 28, 2002, as
     described below. The Non-Cancelable Period, as described below, extends to
     May 5, 2002. Calico may discharge Regent Pacific at any time after the
     Non-Cancelable Period provided that Calico has delivered a 60-day written
     notice of intent to cancel this agreement.

WORK PRODUCT:

  Regent Pacific has agreed to provide the following work product:

     1)   The first two (2) weeks of the twenty-six (26) weeks of
          non-cancelable service included in the Original Agreement at a
          continuing rate of $50,000 per week. These two weeks end January 13,
          2002.

     2)   An additional four (4) weeks of non-cancelable service from January
          14, 2002 through February 10, 2002 at a continuing rate of $50,000
          per week;

     3)   An additional twenty-four (24) weeks of service with reduced staff
          from February 11, 2002 through July 28, 2002 at a rate of $37,000 per
          week, of which the first twelve (12) weeks, which end May 5, 2002,
          will be non-cancelable.

<PAGE>
December 6, 2001
Mr. William D. Unger
On behalf of The Board of Directors
Calico Commerce, Inc.

Page 2

Fees:

     Calico has agreed to pay Regent Pacific $750,000 upon signing of this
     amendment for fees due for the Non-Cancelable Period described above. It is
     further agreed that this payment is earned in full upon receipt by Regent
     Pacific due to the non-cancelable nature of the services to be provided,
     and it is non-refundable.

     It is agreed and understood that at the end of the Non-Cancelable Period,
     if Regent Pacific continues to provide services with reduced staff, the
     fees of $37,500 per week will be payable in four (4) week increments, each
     to be paid in advance of each Regent Pacific standard four-week billing
     period, and that failure to pay such payments when due shall constitute a
     breach of this agreement by Calico.

Except for the additional term of agreement, work product and fees expressly
contained herein, the Original Agreement shall remain in full force and effect.

                                      ###

Yours truly,

REGENT PACIFIC MANAGEMENT CORPORATION

Gary J. Sbona
Chairman and Chief Executive Officer

THE FOREGOING IS HEREBY APPROVED AND AGREED TO:
DATED: 12-13, 2001
CALICO COMMERCE, INC.

BY: /s/ WILLIAM D. UNGER
    ----------------------------
    Name: William D. Unger
    On Behalf of the Board of Directors<PAGE>
                                                                    Exhibit 4.13

                           PROBUSINESS SERVICES, INC.
                         COMMON STOCK PURCHASE AGREEMENT

        This Common Stock Purchase Agreement (this "Agreement") is made and
entered into as of December 20, 2001, by and between ProBusiness Services, Inc.,
a Delaware corporation (the "Company"), and each of the purchasers listed on
Exhibit A attached hereto (collectively, the "Purchasers" and individually, a
"Purchaser").

                                    RECITALS

        WHEREAS, the Company desires to sell to the Purchasers, and the
Purchasers desire to purchase from the Company, shares of Common Stock, par
value $0.001 per share, of the Company (the "Common Stock") on the terms and
conditions set forth in this Agreement; and

        NOW, THEREFORE, in consideration of the foregoing, the mutual promises
hereinafter set forth, and other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the parties hereto agree as
follows:

        1. AGREEMENT TO PURCHASE AND SELL STOCK.

            (a) Authorization. The Company's Board of Directors has authorized
the issuance, pursuant to the terms and conditions of this Agreement, of up to
3,733,334 shares of Common Stock (the "Purchased Shares").

            (b) Agreement to Purchase and Sell Securities. Subject to the terms
and conditions of this Agreement, each Purchaser severally agrees to purchase,
and the Company agrees to sell and issue to each Purchaser, at the Closing (as
defined below), in the case of all Purchasers other than General Atlantic
Partners 74, L.P., GAP Star, LLC, GAPCO GmbH & Co. KG and GAP Coinvestment
Partners II, L.P. (which are collectively referred to herein as the "GAP
Purchasers"), and at the Subsequent Closing (as defined below), in the case of
the GAP Purchasers, that number of Purchased Shares set forth opposite the
appropriate Purchaser's name on Exhibit A attached hereto. The purchase price of
each Purchased Share (the "Per Share Price") shall be $15.00.

            (c) Escrow Account. As soon as practicable after the Closing, but
prior to December 28, 2001, the Company and the GAP Purchasers agree to enter
into an escrow agreement (the "Escrow Agreement"), in substantially the form
attached hereto as Exhibit C, with such changes requested by an escrow agent to
be agreed upon by the parties that are mutually acceptable to both parties,
pursuant to which the parties thereto agree to deposit in escrow an instruction
letter (the "Instruction Letter") to Wells Fargo Shareowner Services, the
Company's transfer agent, instructing such transfer agent to issue stock
certificates representing the aggregate number of Purchased Shares set forth
opposite all of the GAP Purchasers' names on Exhibit A attached hereto (such
Purchased Shares are referred to herein as the "GAP Purchasers Shares") and the
GAP Purchasers Purchase Price (as defined below) with such escrow agent (the
"Escrow Agent"). On or prior to December 28, 2001, the Company agrees to deposit
with the Escrow Agent, to be held in escrow in accordance with the terms of the
Escrow Agreement and, subject to the satisfaction of the conditions set forth in

<PAGE>

Sections 9 and 10 hereto, the Instruction Letter and to deposit prior to the
distribution of the escrow, stock certificates representing the GAP Purchasers
Shares registered in the name of each GAP Purchaser as set forth on Exhibit A
hereto to be distributed to the GAP Purchasers in accordance with the terms of
the Escrow Agreement on the Subsequent Closing Date (as defined below). On or
prior to December 28, 2001, each GAP Purchaser agrees to deposit with the Escrow
Agent, to be held in escrow in accordance with the terms of the Escrow Agreement
and, subject to the satisfaction of the conditions set forth in Sections 9 and
10 hereto, to be distributed to the Company in accordance with the terms of the
Escrow Agreement on the Subsequent Closing Date, the aggregate cash purchase
price set forth opposite such GAP Purchaser's name on Exhibit A (the "GAP
Purchasers Purchase Price").

            (d) Use of Proceeds. The Company intends to apply the net proceeds
from the sale of the Purchased Shares for general corporate purposes.

        2. CLOSINGS.

        Initial Closing. The initial purchase and sale of the Purchased Shares
shall take place at the offices of Wilson Sonsini Goodrich & Rosati,
Professional Corporation, 650 Page Mill Road, Palo Alto, California, at 10:00
a.m. California time, on December 20, 2001, or at such other time and place as
the Company and the Purchasers (other than the GAP Purchasers) mutually agree
upon (which time and place are referred to in this Agreement as the "Closing").
At the Closing, the Company shall authorize its transfer agent to issue to each
Purchaser (other than the GAP Purchasers), against delivery of payment for the
Purchased Shares, one or more stock certificates (the "Certificates") registered
in the name of each Purchaser, representing the number of shares set forth
opposite such Purchaser's name on Exhibit A hereto, and bearing the legend set
forth in Section 4(j) herein. In addition, at the Closing, Wilson Sonsini
Goodrich & Rosati, counsel to the Company, will issue an opinion to the GAP
Purchasers in substantially the form attached hereto as Exhibit B, but stating
that certain Nasdaq requirements relating to the issuance of shares must be
satisfied prior to the issuance of the GAP Purchasers Shares to the GAP
Purchasers.

            (a) Closing documents may be delivered by facsimile with original
signature pages sent by overnight courier. The date of the Closing is referred
to herein as the Closing Date.

            (b) Subsequent Closing. On the latest to occur of (i) December 28,
2001, (ii) the Closing Date or (iii) the business day that (A) the conditions
set forth in Sections 9 and 10 of this Agreement have either been satisfied or
waived and (B) the Escrow Agent is required pursuant to the Escrow Agreement to
distribute the GAP Purchasers Shares and the GAP Purchasers Purchase Price
pursuant to the Escrow Agreement, the subsequent purchase and sale of the GAP
Purchasers Shares shall take place at the offices of Wilson Sonsini Goodrich &
Rosati, Professional Corporation, 650 Page Mill Road, Palo Alto, California, at
10:00 a.m. California time (which time and place are referred to in this
Agreement as the "Subsequent Closing"). At the Subsequent Closing, the Escrow
Agent will distribute (i) to the GAP Purchasers, stock certificates representing
the GAP Purchasers Shares and (ii) to the Company, the GAP Purchasers Purchase
Price. The date of the Subsequent Closing is referred to herein as the
Subsequent Closing Date.

                                      -2-
<PAGE>

        3. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company hereby
represents and warrants to each Purchaser that the statements in this Section 3
are true and correct, except as set forth in the SEC Documents (as defined
below) or in the Disclosure Letter delivered to the Purchasers concurrently
herewith:

            (a) Organization Good Standing and Qualification. The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has all corporate power and authority required to
(a) carry on its business as presently conducted and (b) enter into this
Agreement and the other agreements, instruments and documents contemplated
hereby, and to consummate the transactions contemplated hereby and thereby. The
Company is qualified to do business and is in good standing in each jurisdiction
in which the failure to so qualify would have a Material Adverse Effect. As used
in this Agreement, "Material Adverse Effect" means a material adverse effect on,
or a material adverse change in, or a group of such effects on or changes in,
the business, operations, financial condition, results of operations, assets or
liabilities of the applicable party and its subsidiaries, taken as a whole.

            (b) Capitalization. The capitalization of the Company, without
giving effect to the transactions contemplated by this Agreement, is as follows.
As of October 16, 2001, the authorized stock of the Company consisted of (i)
60,000,000 shares of Common Stock, of which 24,255,843 shares were issued and
outstanding; and (ii) 5,000,000 shares of Preferred Stock, of which 1,800,000
shares were designated as 6.9% Senior Convertible Preferred Stock, 1,132,075 of
which were issued and outstanding, and 60,000 shares were designated Series A
Participating Preferred Stock, none of which were issued and outstanding. All
such shares of Common Stock and Preferred Stock have been duly authorized, and
all such issued and outstanding shares of Common Stock and Preferred Stock have
been validly issued, are fully paid and nonassessable. No such outstanding
shares of Common Stock and Preferred Stock were issued in violation of any
pre-emptive rights.

            As of October 16, 2001, the Company had also reserved: (i) 6,943,658
shares of Common Stock for issuance upon exercise of options granted under the
Company's 1996 Stock Option Plan plus any shares which were forfeited after the
Company's initial public offering and which were issued or subject to issuance
pursuant to options granted under the Company's 1989 Stock Option Plan; (ii)
556,955 shares of Common Stock for issuance to employees of the Company under
the Company's Employee Stock Purchase Plan; (iii) 1,132,075 shares of Common
Stock for issuance upon conversion of the 6.9% Senior Convertible Preferred
Stock; and (iv) 50,961 shares of Common Stock for issuance upon exercise of
outstanding warrants. All shares of Common Stock subject to issuance as
aforesaid, upon issuance on the terms and conditions specified in the
instruments pursuant to which they are issuable, will be duly authorized,
validly issued, fully paid and nonassessable. Except as provided in this
Agreement and set forth in the Disclosure Letter, and except for the (i)
conversion privileges of the 6.9% Senior Convertible Preferred Stock, (ii)
accrued but unpaid dividends on the 6.9% Senior Convertible Preferred Stock,
(iii) shares of Common Stock subject to outstanding options issued under the
Company's Stock Option Plan(s) and Employee Stock Purchase Plan, (iv) shares of
Common Stock reserved for future issuance pursuant to the Company's Stock Option
Plan(s) and Employee Stock Purchase Plan, (v) the rights to purchase Series A
Participating Preferred Stock issued pursuant to the Company's Preferred Stock
Rights Agreement dated as of August 8, 2001 (the "Rights Agreement") and (vi)
shares of Common Stock

                                      -3-
<PAGE>

subject to outstanding warrants, there are no other equity securities, options,
warrants, calls, rights, commitments or agreements of any character to which the
Company is a party or by which it is bound obligating the Company to issue,
deliver, sell, repurchase or redeem, or cause to be issued, delivered, sold,
repurchased or redeemed, any shares of the capital stock of the Company or
obligating the Company to grant, extend or enter into any such equity security,
option, warrant, call, right, commitment or agreement. Except for ProBusiness
Holding Company, Inc., the Company does not have any subsidiaries, nor does the
Company own any capital stock, assets comprising the business of, obligations
of, or any other interest (including any equity or partnership interest) in, or
any outstanding loan or advance to or from, any person or entity.

            (c) Due Authorization. All corporate actions on the part of the
Company necessary for the authorization, execution, delivery of, and the
performance of all obligations of the Company under this Agreement and the
Escrow Agreement and the authorization, issuance, reservation for issuance and
delivery of all of the Purchased Shares being sold under this Agreement have
been taken, and this Agreement constitutes, and the Escrow Agreement when
executed will constitute, the legal, valid and binding obligation of the
Company, enforceable against the Company in accordance with its terms, except
(a) as may be limited by (i) applicable bankruptcy, insolvency, reorganization
or others laws of general application relating to or affecting the enforcement
of creditors' rights generally and (ii) the effect of rules of law governing the
availability of equitable remedies and (b) as rights to indemnity or
contribution may be limited under federal or state securities laws or by
principles of public policy thereunder.

            (d) Valid Issuance of Stock.

                (i) Valid Issuance. The shares of Common Stock to be issued
pursuant to this Agreement will be, upon payment therefor by the Purchasers in
accordance with this Agreement, duly authorized, validly issued, fully paid and
non-assessable.

                (ii) Compliance with Securities Laws. Subject to the accuracy of
the representations made by the Purchasers in Section 4 hereof, the Purchased
Shares (assuming no change in applicable law and no unlawful distribution of
Purchased Shares by the Purchasers or other parties), will be issued to the
Purchasers in compliance with applicable exemptions from (i) the registration
and prospectus delivery requirements of the Securities Act of 1933, as amended
(the "Securities Act") and (ii) the registration and qualification requirements
of all applicable securities laws of the states of the United States.

            (e) Governmental Consents. Except as set forth in the Disclosure
Letter, no consent, approval, order or authorization of, or registration,
qualification, designation, declaration or filing with, or notice to, any
federal, state or local governmental authority on the part of the Company is
required in connection with the issuance of the Purchased Shares, as of the date
hereof, to the Purchasers, or the consummation of the other transactions
contemplated by this Agreement, except (i) such filings as have been made prior
to the date hereof, (ii) the filing of a notification form with The Nasdaq Stock
Market, Inc. ("Nasdaq") and (iii) such additional post-Closing filings as may be
required to comply with applicable state and federal securities laws.

                                      -4-
<PAGE>

            (f) Non-Contravention. Except as set forth in the Disclosure Letter,
the execution, delivery and performance of this Agreement by the Company, and
the consummation by the Company of the transactions contemplated hereby
(including issuance of the Purchased Shares), do not (i) contravene or conflict
with the Amended and Restated Certificate of Incorporation or Bylaws of the
Company; (ii) constitute a material violation of any provision of any federal,
state, local or foreign law binding upon or applicable to the Company; or (iii)
constitute a default or require any consent under, give rise to any right of
termination, cancellation or acceleration of, or to a loss of any material
benefit to which the Company is entitled under, or result in the creation or
imposition of any lien, claim or encumbrance on any assets of the Company under,
any material contract to which the Company is a party or any material permit,
license or similar right relating to the Company or by which the Company may be
bound or affected.

            (g) Litigation. There is no action, suit, proceeding, claim,
arbitration or investigation ("Action") pending or, to the Company's knowledge,
threatened: (a) against the Company, its activities, properties or assets, or
any officer, director or employee of the Company in connection with such
officer's, director's or employee's relationship with, or actions taken on
behalf of, the Company, that is reasonably likely to have a Material Adverse
Effect on the Company, or (b) that seeks to prevent, enjoin, alter or delay the
transactions contemplated by this Agreement (including issuance of the Purchased
Shares). The Company is not a party to or subject to the provisions of, any
order, writ, injunction, judgment or decree of any court or government agency or
instrumentality. No Action by the Company is currently pending nor does the
Company intend to initiate any Action that is reasonably likely to have a
Material Adverse Effect.

            (h) Compliance with Law and Charter Documents. The Company is not in
violation or default of any provisions of its Amended and Restated Certificate
of Incorporation or Bylaws, both as amended. To the Company's knowledge, the
Company has complied in all respects and is in compliance with all applicable
statutes, laws, rules, regulations and orders of the United States of America
and all states thereof, foreign countries and other governmental bodies and
agencies having jurisdiction over the Company's business or properties, except
for any instance of non-compliance that has not had, and would not reasonably be
expected to have, a Material Adverse Effect.

            (i) SEC Documents.

                    (1) Reports. The Company has made available to the
Purchasers prior to the date hereof copies of its Annual Report on Form 10-K for
the fiscal year ended June 30, 2001, its quarterly report on Form 10-Q for the
fiscal quarter ended September 30, 2001 and its Proxy Statement for its 2001
Annual Meeting of Stockholders filed by the Company with the Securities and
Exchange Commission ("SEC") (the Form 10-K, Form 10-Q and Proxy Statement are
collectively referred to herein as the "SEC Documents"). Each of the SEC
Documents, as of the respective date thereof (or if amended or superseded by a
filing prior to the Closing Date, then on the date of such filing), did not
contain any untrue statement of a material fact or omit to state a material fact
necessary in order to make the statements made therein, in light of the
circumstances under which they were made, not misleading. The Company has filed
all material contracts that were required to be filed as exhibits to the SEC
Documents. The Company has not been notified by any other party to a material
contract that such party intends to terminate the material contract.

                                      -5-
<PAGE>

                    (2) Financial Statements. The financial statements of the
Company in the SEC Documents present fairly, in accordance with generally
accepted accounting principles, the financial position of the Company as of the
dates indicated, and the results of its operations and cash flows for the period
therein specified, subject, in the case of unaudited financial statements for
interim periods, to normal year-end audit adjustments.

            (j) Absence of Certain Changes Since Balance Sheet Date. Since
September 30, 2001, the business and operations of the Company have been
conducted in the ordinary course consistent with past practice, and there has
not been, except as set forth in the Disclosure Letter:

                (i) any declaration, setting aside or payment of any dividend or
other distribution of the assets of the Company with respect to any shares of
capital stock of the Company or any repurchase, redemption or other acquisition
by the Company or any subsidiary of the Company of any outstanding shares of the
Company's capital stock;

                (ii) any damage, destruction or loss, whether or not covered by
insurance, except for such occurrences, individually and collectively, that have
not had, and would not reasonably be expected to have, a Material Adverse
Effect;

                (iii) any waiver by the Company of a valuable right or of a
material debt owed to it, except for such waivers, individually and
collectively, that have not had, and would not reasonably be expected to have, a
Material Adverse Effect;

                (iv) any material change or amendment to, or any waiver of any
material right under a material contract or arrangement by which the Company or
any of its assets or properties is bound or subject, except for changes,
amendments or waivers that are expressly provided for or disclosed in this
Agreement;

                (v) any change by the Company in its accounting principles,
methods or practices or in the manner it keeps its accounting books and records,
except any such change required by a change in GAAP or by the Securities and
Exchange Commission; or

                (vi) any other event or condition of any character, except for
such events and conditions that have not resulted, and are not expected to
result, either individually or collectively, in a Material Adverse Effect.

            (k) Intellectual Property. The Company owns or possesses adequate
rights to use all patents, patent rights, inventions, trade secrets, know-how,
trademarks, service marks, trade names, copyrights or other information
(collectively, "Intellectual Property"), which are necessary to conduct its
businesses as currently conducted, except where the failure to currently own or
possess would not result, either individually or in the aggregate, in a Material
Adverse Effect. The Company has not received any notice of, and has no knowledge
of, any infringement of or conflict with asserted rights of others with respect
to any Intellectual Property which, singly or in the aggregate, if the subject
of an unfavorable decision, ruling or finding, would reasonably be expected to
have a Material Adverse Effect, and to the Company's knowledge, none of the
patent rights owned or licensed by the Company are unenforceable or invalid. The
Company has entered into proprietary

                                      -6-
<PAGE>

rights agreements with its key employees to protect its Intellectual Property.
The Company has not received notice that any of its employees is infringing the
proprietary rights of others.

            (l) Registration Rights. Except as provided in Section 5 herein and
the Amended and Restated Registration Rights Agreement made as of March 12,
1997, by and among ProBusiness, Inc., a California company and predecessor to
the Company, General Atlantic Partners 39, L.P., GAP Coinvestment Partners,
L.P., Thomas H. Sinton and the Holders, as amended, effective upon the Closing,
the Company is not currently subject to any agreement providing any person or
entity any rights (including piggyback registration rights) to have any
securities of the Company registered with the SEC or registered or qualified
with any other governmental authority.

            (m) Title to Property and Assets. Except as set forth in the
Disclosure Letter, the properties and assets of the Company are owned by the
Company free and clear of all mortgages, deeds of trust, liens, charges,
encumbrances and security interests except for statutory liens for the payment
of current taxes that are not yet delinquent and liens, encumbrances and
security interests that arise in the ordinary course of business and do not in
any material respect affect the properties and assets of the Company. With
respect to the property and assets it leases, the Company is in compliance with
such leases in all material respects.

            (n) Taxes. The Company has filed all necessary federal, state, and
foreign income and franchise tax returns due prior to the date hereof and has
paid or accrued all taxes shown as due thereon, and the Company has no knowledge
of any material tax deficiency which has been or might be asserted or threatened
against it.

            (o) Insurance. The Company maintains and will continue to maintain
insurance of the types and in the amounts that the Company reasonably believes
is prudent and adequate for its business, all of which insurance is in full
force and effect.

            (p) General Solicitation. Neither the Company nor any other person
or entity authorized by the Company to act on its behalf has engaged in a
general solicitation or general advertising (within the meaning of Regulation D
of the Securities Act) of investors with respect to offers or sales of the
Purchased Shares.

            (q) S-3 Eligibility. The Company meets the eligibility requirements
for use of a Form S-3 Registration Statement.

        4. REPRESENTATIONS, WARRANTIES AND CERTAIN AGREEMENTS OF THE PURCHASER.
Each Purchaser hereby represents and warrants to the Company severally and not
jointly, and agrees that:

            (a) Organization Good Standing and Qualification. The Purchaser has
all corporate, membership or partnership power and authority required to enter
into this Agreement and the other agreements, instruments and documents
contemplated hereby, and to consummate the transactions contemplated hereby and
thereby.

            (b) Authorization. The execution of this Agreement has been duly
authorized by all necessary corporate, membership or partnership action on the
part of the Purchaser. This

                                      -7-
<PAGE>

Agreement constitutes the Purchaser's legal, valid and binding obligation,
enforceable in accordance with its terms, except (a) as may be limited by (i)
applicable bankruptcy, insolvency, reorganization or other laws of general
application relating to or affecting the enforcement of creditors' rights
generally and (ii) the effect of rules of law governing the availability of
equitable remedies and (b) as rights to indemnity or contribution may be limited
under federal or state securities laws or by principles of public policy
thereunder.

            (c) Litigation. There is no Action pending that seeks to prevent,
enjoin, alter or delay the transactions contemplated by this Agreement.

            (d) Purchase for Own Account. The Purchased Shares are being
acquired for investment for the Purchaser's own account, not as a nominee or
agent, and not with a view to the public resale or distribution thereof within
the meaning of the Securities Act, and the Purchaser has no present intention of
selling, granting any participation in, or otherwise distributing the same. The
Purchaser also represents that it has not been formed for the specific purpose
of acquiring the Purchased Shares and that, as of the date hereof, and except as
disclosed in a disclosure letter to the Company, it does not own any shares of
Common Stock of the Company.

            (e) Investment Experience. The Purchaser understands that the
purchase of the Purchased Shares involves substantial risk. The Purchaser has
experience as an investor in securities of companies and acknowledges that it is
able to fend for itself, can bear the economic risk of its investment in the
Purchased Shares and has such knowledge and experience in financial or business
matters that it is capable of evaluating the merits and risks of this investment
in the Purchased Shares and protecting its own interests in connection with this
investment.

            (f) Accredited Purchaser Status. The Purchaser is an "accredited
investor" within the meaning of Regulation D promulgated under the Securities
Act.

            (g) Reliance Upon Purchaser's Representations. The Purchaser
understands that the issuance and sale of the Purchased Shares to it will not be
registered under the Securities Act on the ground that such issuance and sale
will be exempt from registration under the Securities Act pursuant to Section
4(2) thereof, and that the Company's reliance on such exemption is based on each
Purchaser's representations set forth herein.

            (h) Receipt of Information. The Purchaser has had an opportunity to
ask questions and receive answers from the Company regarding the terms and
conditions of the issuance and sale of the Purchased Shares and the business,
properties, prospects and financial condition of the Company and to obtain any
additional information requested and has received and considered all information
it deems relevant to make an informed decision to purchase the Purchased Shares.

            (i) Restricted Securities. The Purchaser will not sell, offer to
sell, assign, pledge, hypothecate or otherwise transfer any of the Purchased
Shares unless (i) pursuant to an effective registration statement under the
Securities Act, (ii) such holder provides the Company with an opinion of
counsel, in a generally acceptable form, to the effect that a public sale,
assignment or transfer of the Securities may be made without registration under
the Securities Act, or (iii) such holder provides the Company with reasonable
assurances that the Securities can be sold pursuant to

                                      -8-
<PAGE>

Rule 144 under the Securities Act without any restriction as to the number of
securities acquired as of a particular date that can be immediately sold.
Notwithstanding anything to the contrary contained in the Agreement, the
Purchaser may transfer (without restriction and without the need for an opinion
of counsel) the Purchased Shares to its affiliates provided that such affiliate
is an "accredited investor" under Regulation D and such affiliate agrees to be
bound by the terms and conditions of the Agreement.

            (j) Legends. The Purchaser agrees that the certificates for the
Purchased Shares shall bear the following legend:

                "The securities represented by this certificate have not been
                registered under the Securities Act of 1933 or with any state
                securities commission, and may not be transferred or disposed of
                by the holder in the absence of a registration statement which
                is effective under the Securities Act of 1933 and applicable
                state laws and rules, or, unless, immediately prior to the time
                set for transfer, such transfer may be effected without
                violation of the Securities Act of 1933 and other applicable
                state laws and rules."

        In addition, the Purchaser agrees that the Company may place stop
transfer orders with its transfer agents with respect to such certificates. The
appropriate portion of the legend and the stop transfer orders will be removed
promptly upon delivery to the Company of such satisfactory evidence as
reasonably may be required by the Company that such legend or stop orders are
not required to ensure compliance with the Securities Act.

            (k) HSR Compliance.

                (i) Each Purchaser is its own "ultimate parent entity" as
defined in the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended
or the rules and regulations promulgated thereto (together, the "HSR Act").

                (ii) Each Investor will hold less than $50,000,000 in voting
securities of the Company following execution of this Agreement, as valued under
the HSR Act.

        5. REGISTRATION; COMPLIANCE WITH THE SECURITIES ACT.

            (a) Registration Procedures and Expenses. The Company hereby agrees
that it shall:

                (i) subject to receipt of necessary information from the
Purchasers, prepare and file with the SEC as soon as practicable and in no event
later than thirty (30) days following the Closing, a registration statement on
Form S-3 (the "Registration Statement"), to enable the resale of the Purchased
Shares (collectively, the "Registrable Shares") by the Purchasers from time to
time on Nasdaq and use all reasonable efforts to cause such Registration
Statement to be declared effective as promptly as possible after filing and to
remain continuously effective until the earlier of (i) the second anniversary of
the Closing, or (ii) such time as all Registrable Shares purchased by the
Purchasers pursuant to this Agreement have been sold thereunder or pursuant to
Rule 144 under the Securities Act (the "Registration Period"). In the event that
Form S-3 is

                                      -9-
<PAGE>

unavailable for such registration, the Company shall use such other form as is
available for such a registration;

                (ii) prepare and file with the SEC such amendments (including
post-effective amendments) and supplements to the Registration Statement and the
prospectus used in connection therewith as may be necessary to keep the
Registration Statement effective at all times until the end of the Registration
Period;

                (iii) furnish to the Purchasers with respect to the Registrable
Shares registered under the Registration Statement such reasonable number of
copies of any prospectus in conformity with the requirements of the Securities
Act and such other documents as the Purchaser may reasonably request, in order
to facilitate the public sale or other disposition of all or any of the
Registrable Shares by the Purchasers;

                (iv) use its reasonable commercial efforts to file documents
required of the Company for normal blue sky clearance in states specified in
writing by the Purchasers; provided, however, that the Company shall not be
required to qualify to do business or consent to service of process in any
jurisdiction in which it is not now so qualified or has not so consented;

                (v) use its reasonable commercial efforts to cause the
Registrable Shares to be listed on Nasdaq in connection with the filing of the
Registration Statement under Section 5(a)(i);

                (vi) use its reasonable commercial efforts to cause the
Registration Statement to be declared effective on or prior to one hundred
twenty (120) days following the Closing and to promptly notify the Purchasers
when the Registration Statement has been declared effective;

                (vii) bear all expenses in connection with the procedures in
paragraph (i) through (vi) of this Section 5(a) and the registration of the
Registrable Shares pursuant to the Registration Statement other than fees and
expenses, if any, of legal counsel or other advisers to the Purchasers or
underwriting discounts, brokerage fees and commissions incurred by the
Purchasers, if any.

        It shall be a condition precedent to the obligations of the Company to
take any action pursuant to this Section 5(a) that the Purchaser shall furnish
to the Company such information regarding itself, the Registrable Shares to be
sold by the Purchaser, and the intended method of disposition of such securities
as shall be required to effect the registration of the Registrable Shares.

            (b) Transfer of Registrable Shares After Registration; Suspension.

                (i) The Purchasers agree that they will not offer to sell or
make any sale, assignment, pledge, hypothecation or other transfer with respect
to the Registrable Shares that would constitute a sale within the meaning of the
Securities Act except pursuant to either (i) the Registration Statement referred
to in Section 5(a) or (ii) Rule 144, and that they will promptly notify the
Company of any changes in the information set forth in the Registration
Statement after it is prepared regarding the Purchaser or its plan of
distribution to the extent required by applicable law.

                                      -10-
<PAGE>

                (ii) In addition to any suspension rights under paragraph (iii)
below, the Company may, upon the happening of any event, that, in the judgment
of Company's board of directors, renders it advisable to suspend use of the
prospectus for no more than ninety (90) days in the aggregate in any twelve (12)
month period of time due to pending corporate developments, public filings with
the SEC or similar events, suspend use of the prospectus on written notice to
each Purchaser (which notice will not disclose the content of any material
non-public information and will indicate the date of the beginning and end of
the intended suspension, if known), in which case each Purchaser shall
discontinue disposition of Registrable Shares covered by the Registration
Statement or prospectus until copies of a supplemented or amended prospectus are
distributed to the Purchasers or until the Purchasers are advised in writing by
the Company that the use of the applicable prospectus may be resumed. The
suspension and notice thereof described in this Section 5(b)(ii) shall be held
in strictest confidence and not disclosed by the Purchasers.

                (iii) Subject to paragraph (iv) below, in the event of: (i) any
request by the SEC or any other federal or state governmental authority during
the period of effectiveness of the Registration Statement for amendments or
supplements to a Registration Statement or related prospectus or for additional
information, (ii) the issuance by the SEC or any other federal or state
governmental authority of any stop order suspending the effectiveness of a
Registration Statement or the initiation of any proceedings for that purpose,
(iii) the receipt by the Company of any notification with respect to the
suspension of the qualification or exemption from qualification of any of the
Registrable Shares for sale in any jurisdiction or the initiation of any
proceeding for such purpose, (iv) any event or circumstance which necessitates
the making of any changes in the Registration Statement or prospectus, or any
document incorporated or deemed to be incorporated therein by reference, so
that, in the case of the Registration Statement, it will not contain any untrue
statement of a material fact or any omission to state a material fact required
to be stated therein or necessary to make the statements therein not misleading,
and that in the case of the prospectus, it will not contain any untrue statement
of a material fact or any omission to state a material fact required to be
stated therein or necessary to make the statements therein, in the light of the
circumstances under which they were made, not misleading, then the Company shall
deliver a certificate in writing to the Purchasers (the "Suspension Notice") to
the effect of the foregoing (which notice will not disclose the content of any
material non-public information and will indicate the date of the beginning and
end of the intended suspension, if known), and, upon receipt of such Suspension
Notice, the Purchasers will refrain from selling any Registrable Shares pursuant
to the Registration Statement (a "Suspension") until the Purchasers' receipt of
copies of a supplemented or amended prospectus prepared and filed by the
Company, or until it is advised in writing by the Company that the current
prospectus may be used, and has received copies of any additional or
supplemental filings that are incorporated or deemed incorporated by reference
in any such prospectus. In the event of any Suspension, the Company will use its
reasonable commercial efforts to cause the use of the prospectus so suspended to
be resumed as soon as possible after delivery of a Suspension Notice to the
Purchasers. The Suspension and Suspension Notice described in this Section
5(b)(iii) shall be held in strictest confidence and not disclosed by the
Purchasers.

                (iv) Provided that a Suspension is not then in effect, the
Purchasers may sell Registrable Shares under the Registration Statement,
provided that the selling Purchaser arranges for delivery of a current
prospectus to the transferee of such Registrable Shares.

                                      -11-
<PAGE>

                (v) In the event of a sale of Registrable Shares by an
Purchaser, such Purchaser must also deliver to the Company's transfer agent,
with a copy to the Company, a certificate of subsequent sale reasonably
satisfactory to the Company, so that ownership of the Registrable Shares may be
properly transferred.

            (c) Indemnification. For the purpose of this Section 5(c), the term
"Registration Statement" shall include any preliminary or final prospectus,
exhibit, supplement or amendment included in or relating to the Registration
Statement referred to in Section 5(a).

                (i) Indemnification by the Company. The Company agrees to
indemnify and hold harmless each of the Purchasers and each person, if any, who
controls any Purchaser within the meaning of the Securities Act, against any
losses, claims, damages, liabilities or expenses, joint or several, to which
such Purchasers or such controlling person may become subject, under the
Securities Act, the Exchange Act, or any other federal or state statutory law or
regulation, or at common law or otherwise (including in settlement of any
litigation, if such settlement is effected with the written consent of the
Company, which consent shall not be unreasonably withheld), insofar as such
losses, claims, damages, liabilities or expenses (or actions in respect thereof
as contemplated below) arise out of or are based upon any untrue statement or
alleged untrue statement of any material fact contained in the Registration
Statement, as amended as of the time the Registration Statement was declared
effective by the SEC, the prospectus filed with the SEC pursuant to Rule 424(b)
under the Act, or if no such filing is required, as included in the Registration
Statement (the "Prospectus"), or any amendment or supplement thereto, or arise
out of or are based upon the omission or alleged omission to state in any of
them a material fact required to be stated therein or necessary to make the
statements in any of them, in light of the circumstances under which they were
made, not misleading, and will reimburse each Purchaser and each such
controlling person for any legal and other expenses as such expenses are
reasonably incurred by such Purchaser or such controlling person in connection
with investigating, defending, settling, compromising or paying any such loss,
claim, damage, liability, expense or action; provided, however, that the Company
will not be liable in any such case to the extent that any such loss, claim,
damage, liability or expense arises out of or is based upon (i) an untrue
statement or alleged untrue statement or omission or alleged omission made in
the Registration Statement, the Prospectus or any amendment or supplement of the
Registration Statement or Prospectus in reliance upon and in conformity with
written information furnished to the Company by or on behalf of the Purchaser
expressly for use in the Registration Statement or the Prospectus, (ii) the
failure of such Purchaser to comply with the covenants and agreements contained
in this Agreement respecting resale of the Purchased Shares, or (iii) any untrue
statement or omission of a material fact required to make such statement not
misleading in any Prospectus that is corrected in any subsequent Prospectus that
was delivered to the Purchaser before the pertinent sale or sales by the
Purchaser.

                (ii) Indemnification by the Purchaser. Each Purchaser will
severally and not jointly indemnify and hold harmless the Company, each of its
directors, each of its officers who signed the Registration Statement and each
person, if any, who controls the Company within the meaning of the Securities
Act, against any losses, claims, damages, liabilities or expenses to which the
Company, each of its directors, each of its officers who signed the Registration
Statement or controlling person may become subject, under the Securities Act,
the Exchange Act, or any other federal or state statutory law or regulation, or
at common law or otherwise (including in settlement

                                      -12-
<PAGE>

of any litigation, if such settlement is effected with the written consent of
such Purchaser, which consent shall not be unreasonably withheld) insofar as
such losses, claims, damages, liabilities or expenses (or actions in respect
thereof as contemplated below) arise out of or are based upon (i) any failure on
the part of such Purchaser to comply with the covenants and agreements contained
in this Agreement respecting the sale of the Purchased Shares or (ii) any untrue
or alleged untrue statement of any material fact contained in the Registration
Statement, the Prospectus, or any amendment or supplement to the Registration
Statement or Prospectus, or arise out of or are based upon the omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in the Registration
Statement, the Prospectus, or any amendment or supplement thereto, in reliance
upon and in conformity with written information furnished to the Company by or
on behalf of such Purchaser expressly for use therein; provided, however, that
the Purchaser shall not be liable for any such untrue or alleged untrue
statement or omission or alleged omission of which the Purchaser has delivered
to the Company in writing a correction before the occurrence of the transaction
from which such loss was incurred, and the Purchaser will reimburse the Company,
each of its directors, each of its officers who signed the Registration
Statement or controlling person for any legal and other expense reasonably
incurred by the Company, each of its directors, each of its officers who signed
the Registration Statement or controlling person in connection with
investigating, defending, settling, compromising or paying any such loss, claim,
damage, liability, expense or action.

                (iii) Indemnification Procedure.

                    (1) Promptly after receipt by an indemnified party under
this Section 5(c) of notice of the threat or commencement of any action, such
indemnified party will, if a claim in respect thereof is to be made against an
indemnifying party under this Section 5(c), promptly notify the indemnifying
party in writing of the claim; but the omission so to notify the indemnifying
party will not relieve it from any liability which it may have to any
indemnified party for contribution or otherwise under the indemnity agreement
contained in this Section 5(c) or otherwise, to the extent it is not prejudiced
as a result of such failure.

                    (2) In case any such action is brought against any
indemnified party and such indemnified party seeks or intends to seek indemnity
from an indemnifying party, the indemnifying party will be entitled to
participate in, and, to the extent that it may wish, jointly with all other
indemnifying parties similarly notified, to assume the defense thereof with
counsel reasonably satisfactory to such indemnified party; provided, however, if
the defendants in any such action include both the indemnified party and the
indemnifying party and the indemnified party shall have reasonably concluded
that there may be a conflict between the positions of the indemnifying party and
the indemnified party in conducting the defense of any such action or that there
may be legal defenses available to it or other indemnified parties that are
different from or additional to those available to the indemnifying party, the
indemnified party or parties shall have the right to select separate counsel to
assume such legal defenses and to otherwise participate in the defense of such
action on behalf of such indemnified party or parties. Upon receipt of notice
from the indemnifying party to such indemnified party of its election so to
assume the defense of such action and approval by the indemnified party of
counsel, the indemnifying party will not be liable to such

                                      -13-
<PAGE>

indemnified party under this Section 5(c) for any legal or other expenses
subsequently incurred by such indemnified party in connection with the defense
thereof unless:

                        a) the indemnified party shall have employed such
counsel in connection with the assumption of legal defenses in accordance with
the proviso to the preceding sentence (it being understood, however, that the
indemnifying party shall not be liable for the expenses of more than one
separate counsel, approved by such indemnifying party representing all of the
indemnified parties who are parties to such action) or

                        b) the indemnifying party shall not have employed
counsel reasonably satisfactory to the indemnified party to represent the
indemnified party within a reasonable time after notice of commencement of
action, in each of which cases the reasonable fees and expenses of counsel shall
be at the expense of the indemnifying party. Notwithstanding the provisions of
this Section 5(c), the Purchaser shall not be liable for any indemnification
obligation under this Agreement in excess of the aggregate amount of gross
proceeds received by the Purchaser from the sale of the Purchased Shares
pursuant to the Registration Statement.

                (iv) Contribution. If the indemnification provided for in this
Section 5(c) is required by its terms but is for any reason held to be
unavailable to or otherwise insufficient to hold harmless an indemnified party
under this Section 5(c) in respect to any losses, claims, damages, liabilities
or expenses referred to in this Agreement, then each applicable indemnifying
party shall contribute to the amount paid or payable by such indemnified party
as a result of any losses, claims, damages, liabilities or expenses referred to
in this Agreement

                    (1) in such proportion as is appropriate to reflect the
relative benefits received by the Company and the Purchaser from the placement
of Common Stock or

                    (2) if the allocation provided by clause (1) above is not
permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause (1) above but the relative
fault of the Company and the Purchaser in connection with the statements or
omissions or inaccuracies in the representations and warranties in this
Agreement that resulted in such losses, claims, damages, liabilities or
expenses, as well as any other relevant equitable considerations.

        The respective relative benefits received by the Company on the one hand
and each Purchaser on the other shall be deemed to be in the same proportion as
the amount paid by such Purchaser to the Company pursuant to this Agreement for
the Purchased Shares purchased by such Purchaser that were sold pursuant to the
Registration Statement bears to the difference (the "Difference") between the
amount such Purchaser paid for the Purchased Shares that were sold pursuant to
the Registration Statement and the amount received by such Purchaser from such
sale. The relative fault of the Company and each Purchaser shall be determined
by reference to, among other things, whether the untrue or alleged statement of
a material fact or the omission or alleged omission to state a material fact or
the inaccurate or the alleged inaccurate representation or warranty relates to
information supplied by the Company or by such Purchaser and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The amount paid or payable by a party as a
result of the losses, claims, damages, liabilities and

                                      -14-
<PAGE>

expenses referred to above shall be deemed to include, subject to the
limitations set forth in Section 5(c)(iii), any legal or other fees or expenses
reasonably incurred by such party in connection with investigating or defending
any action or claim. The provisions set forth in Section 5(c)(iii) with respect
to the notice of the threat or commencement of any threat or action shall apply
if a claim for contribution is to be made under this Section 5(c)(iv); provided,
however, that no additional notice shall be required with respect to any threat
or action for which notice has been given under Section 5(c) for purposes of
indemnification. The Company and each Purchaser agree that it would not be just
and equitable if contribution pursuant to this Section 5(c) were determined
solely by pro rata allocation (even if the Purchasers were treated as one entity
for such purpose) or by any other method of allocation which does not take
account of the equitable considerations referred to in this paragraph.
Notwithstanding the provisions of this Section 5(c), no Purchaser shall be
required to contribute any amount in excess of the amount by which the
Difference exceeds the amount of any damages that such Purchaser has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission. No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The Purchasers' obligations to contribute pursuant to this
Section 5(c) are several and not joint.

            (d) Rule 144 Information. For two years after the date of this
Agreement, the Company shall use its best efforts to file all reports required
to be filed by it under the Securities Act, the Rules and Regulations and the
Exchange Act and shall take such further action to the extent required to enable
the Purchasers to sell the Purchased Shares pursuant to Rule 144 under the
Securities Act (as such rule may be amended from time to time).

        6. ADVISORY FEE. The Purchasers acknowledge that the Company intends to
pay to Salomon Smith Barney Inc., William Blair & Company and Robert W. Baird &
Co., financial advisors, a fee in respect of the sale of the Purchased Shares.
Each of the parties to this Agreement hereby represents that, on the basis of
any actions and agreements by it, there are no other brokers or finders entitled
to compensation in connection with the sale of the Purchased Shares to the
Purchasers. The Company shall indemnify and hold harmless the Purchasers from
and against all fees, commissions or other payments owing by the Company to
Salomon Smith Barney Inc., William Blair & Company and Robert W. Baird & Co. or
any other person or firm acting on behalf of the Company hereunder.

        7. CONDITIONS TO THE PURCHASER'S OBLIGATIONS AT CLOSING. The obligations
of the Purchasers under Section 2(a) of this Agreement are subject to the
fulfillment or waiver, on or before the Closing, of each of the following
conditions:

            (a) Representations and Warranties True. Each of the representations
and warranties of the Company contained in Section 3 shall be true and correct
in all material respects on and as of the date of the date hereof and on and as
of the date of the Closing, except as set forth in the Disclosure Letter or the
SEC Documents, with the same effect as though such representations and
warranties had been made as of the Closing.

            (b) Performance. The Company shall have performed and complied in
all material respects with all agreements, obligations and conditions contained
in this Agreement that

                                      -15-
<PAGE>

are required to be performed or complied with by it on or before the Closing and
shall have obtained all approvals, consents and qualifications necessary to
complete the purchase and sale described herein.

            (c) Compliance Certificate. The Company will have delivered to the
Purchasers at the Closing a certificate signed on its behalf by its Chief
Executive Officer or Chief Financial Officer certifying that the conditions
specified in Sections 7(a) and 7(b) hereof have been fulfilled.

            (d) Securities Exemptions. The offer and sale of the Purchased
Shares to the Purchasers pursuant to this Agreement shall be exempt from the
registration requirements of the Securities Act and the registration and/or
qualification requirements of all applicable state securities laws.

            (e) Opinion of Company Counsel. The Purchasers will have received an
opinion on behalf of the Company, dated as of the date of the Closing, from
Wilson, Sonsini, Goodrich & Rosati, counsel to the Company, in the form attached
as Exhibit B.

            (f) Other Actions. The Company shall have executed such
certificates, agreements, instruments and other documents, and taken such other
actions as shall be customary or reasonably requested by the Purchasers in
connection with the transactions contemplated hereby.

        8. CONDITIONS TO THE COMPANY'S OBLIGATIONS AT CLOSING. The obligations
of the Company to the Purchasers under this Agreement are subject to the
fulfillment or waiver, on or before the Closing, of each of the following
conditions:

            (a) Representations and Warranties True. The representations and
warranties of the Purchasers contained in Section 4 shall be true and correct in
all material respects on and as of the date hereof and on and as of the date of
the Closing with the same effect as though such representations and warranties
had been made as of the Closing.

            (b) Performance. The Purchasers shall have performed and complied in
all material respects with all agreements, obligations and conditions contained
in this Agreement that are required to be performed or complied with by it on or
before the Closing and shall have obtained all approvals, consents and
qualifications necessary to complete the purchase and sale described herein.

            (c) Securities Exemptions. The offer and sale of the Purchased
Shares to the Purchasers pursuant to this Agreement shall be exempt from the
registration requirements of the Securities Act and the registration and/or
qualification requirements of all applicable state securities laws.

            (d) Payment of Purchase Price. The Purchasers shall have delivered
to the Company same day funds in full payment of the purchase price as specified
in Section 1(b).

            (e) Proceedings and Documents. All corporate and other proceedings
in connection with the transactions contemplated at the Closing and all
documents incident thereto will be reasonably satisfactory in form and substance
to the Company and to the Company's legal

                                      -16-
<PAGE>

counsel, and the Company will have received all such counterpart originals and
certified or other copies of such documents as it may reasonably request.

            (f) Other Actions. The Purchasers shall have executed such
certificates, agreements, instruments and other documents, and taken such other
actions as shall be customary or reasonably requested by the Company in
connection with the transactions contemplated hereby.

        9. CONDITIONS TO THE GAP PURCHASERS' OBLIGATIONS AT SUBSEQUENT CLOSING.
The obligations of the GAP Purchasers under Section 2(b) of this Agreement are
subject to the fulfillment by the Company or waiver by the GAP Purchasers, on or
before the date that is 150 days after the Closing Date, of the following
condition: The Company shall have received either (i) written confirmation from
Nasdaq that the approval of a majority of the Company's stockholders, present in
person or proxy at a properly convened meeting of the Company's stockholders
("Stockholder Approval") of the issuance of the GAP Purchasers Shares is not
required under the applicable Nasdaq rules and regulations or (ii) Stockholder
Approval of the issuance to the GAP Purchasers of the GAP Purchasers Shares
("Applicable Stockholder Approval").

        10. CONDITIONS TO THE COMPANY'S OBLIGATIONS AT SUBSEQUENT CLOSING. The
obligations of the Company to the GAP Purchasers under this Agreement are
subject to the fulfillment by the GAP Purchasers or waiver by the Company, on or
before the date that is 150 days after the Closing Date, of the following
condition: The Company shall have received either (i) written confirmation from
Nasdaq that Stockholder Approval of the issuance of the GAP Purchasers Shares is
not required under the applicable Nasdaq rules and regulations or (ii)
Applicable Stockholder Approval.

        11. AFFIRMATIVE COVENANTS.

            (a) Nasdaq Matters. The Company hereby covenants and agrees with the
GAP Purchasers as follows:

                (i) The Company shall take all action required and shall make
all submissions that are reasonably necessary to obtain written confirmation
reasonably satisfactory to the Company and the GAP Purchasers from Nasdaq that
the approval of a majority of the Company's stockholders of the issuance of the
GAP Purchasers Shares is not required under the applicable Nasdaq rules and
regulations in order to satisfy the conditions for the Subsequent Closing in
Sections 9 and 10. If the Company cannot obtain such written confirmation by
February 15, 2002, it shall take all action required by Nasdaq and applicable
Delaware law (including the actions referred to in Section 11(a)(ii)) to obtain
Applicable Stockholder Approval. The Board of Directors shall recommend that the
Company's stockholders vote in favor of the Applicable Stockholder Approval.

                (ii) If required pursuant to Section 11(a)(i) of this Agreement,
promptly after February 15, 2002, the Company will prepare and file with the SEC
a proxy statement to be distributed to the Company's stockholders in connection
with the solicitation of votes in favor of the Applicable Stockholder Approval,
including any amendments or supplements thereto (the "Proxy

                                      -17-
<PAGE>

Statement"). The Company will use all reasonable commercial efforts to have or
cause the Proxy Statement to be cleared by the SEC as promptly as practicable.
The Company agrees to provide the GAP Purchasers and their respective counsel
with any written comments the Company or its counsel may receive from the SEC
with respect to the Proxy Statement promptly after the receipt of such comments.
The Company will use all reasonable commercial efforts to cause the Proxy
Statement (A) not to contain any untrue statement of a material fact or omit to
state any material fact required to be stated therein or necessary in order to
make the statements therein, in light of the circumstances under which they are
made, not misleading and (B) to comply as to form in all material respects with
the applicable provisions of the Exchange Act and the rules and regulations
thereunder. Following clearance by the Commission of the Proxy Statement, the
Company shall promptly distribute the Proxy Statement to its stockholders and
call and arrange for a special meeting of stockholders and take such other
actions as are required or necessary in order to obtain the Applicable
Stockholder Approval as promptly as practicable.

            (b) Voting. The Purchasers agree that if it is necessary for the
Company to seek Applicable Stockholder Approval, each of the Purchasers will
vote any shares beneficially owned by such entities in "favor" of the proposal.

        12. MISCELLANEOUS.

            (a) Successors and Assigns. The terms and conditions of this
Agreement will inure to the benefit of and be binding upon the respective
successors and permitted assigns of the parties.

            (b) Governing Law. This Agreement will be governed by and construed
under the internal laws of the State of California, without reference to
principles of conflict of laws or choice of laws.

            (c) Counterparts. This Agreement may be executed in two or more
counterparts, each of which will be deemed an original, but all of which
together will constitute one and the same instrument.

            (d) Headings. The headings and captions used in this Agreement are
used for convenience only and are not to be considered in construing or
interpreting this Agreement. All references in this Agreement to sections,
paragraphs, exhibits and schedules will, unless otherwise provided, refer to
sections and paragraphs hereof and exhibits and schedules attached hereto, all
of which exhibits and schedules are incorporated herein by this reference.

            (e) Notices. Any notice required or permitted under this Agreement
shall be given in writing, shall be effective when received, and shall in any
event be deemed received and effectively given upon personal delivery to the
party to be notified or three (3) business days after deposit with the United
States Post Office, by registered or certified mail, postage prepaid, or one (1)
business day after deposit with a nationally recognized courier service such as
Federal Express for next business day delivery under circumstances in which such
service guarantees next business day

                                      -18-
<PAGE>

delivery, or one (1) business day after facsimile with copy delivered by
registered or certified mail, in any case, postage prepaid and addressed to the
party to be notified at the address indicated for such party on the signature
page hereof or at such other address as the Purchaser or the Company may
designate by giving at least ten (10) days advance written notice pursuant to
this Section 12(e).

            (f) Amendments and Waivers. This Agreement may be amended and the
observance of any term of this Agreement may be waived (either generally or in a
particular instance and either retroactively or prospectively), only with the
written consent of the Company and the holders of Purchased Shares representing
at least a majority of the total aggregate number of Purchased Shares then
outstanding (excluding any of such shares that have been sold in a transaction
in which registration rights are not assigned in accordance with this Agreement
or sold to the public pursuant to SEC Rule 144 or otherwise); provided, however,
that any amendment or waiver of Sections 1(c), 2(b), 9, 10 and 11 of this
Agreement shall also require the written consent of the GAP Purchasers. Any
amendment or waiver effected in accordance with this Section 12(f) will be
binding upon the Purchasers, the Company and their respective successors and
assigns.

            (g) Severability. If any provision of this Agreement is held to be
unenforceable under applicable law, such provision will be excluded from this
Agreement and the balance of the Agreement will be interpreted as if such
provision were so excluded and will be enforceable in accordance with its terms.

            (h) Entire Agreement. This Agreement, together with all exhibits and
schedules hereto and thereto constitutes the entire agreement and understanding
of the parties with respect to the subject matter hereof and supersedes any and
all prior negotiations, correspondence, agreements, understandings, duties or
obligations between the parties with respect to the subject matter hereof.

            (i) Further Assurances. From and after the date of this Agreement
upon the request of the Company or the Purchasers, the Company and the
Purchasers will execute and deliver such instruments, documents or other
writings, and take such other actions, as may be reasonably necessary or
desirable to confirm and carry out and to effectuate fully the intent and
purposes of this Agreement.

            (j) Meaning of Include and Including. Whenever in this Agreement the
word "include" or "including" is used, it shall be deemed to mean "include,
without limitation" or "including, without limitation," as the case may be, and
the language following "include" or "including" shall not be deemed to set forth
an exhaustive list.

            (k) Fees, Costs and Expenses. All fees, costs and expenses
(including attorneys' fees and expenses) incurred by any party hereto in
connection with the preparation, negotiation and execution of this Agreement and
the exhibits and schedules hereto and the consummation of the transactions
contemplated hereby and thereby (including the costs associated with any filings
with, or compliance with any of the requirements of, any governmental
authorities), shall be the sole and exclusive responsibility of such party.

            (l) Stock Splits, Dividends and other Similar Events. The provisions
of this Agreement (including the number of shares of Common Stock and other
securities described herein)

                                      -19-
<PAGE>

shall be appropriately adjusted to reflect any stock split, stock dividend,
reorganization or other similar event that may occur with respect to the Company
after the date hereof.

            [THE BALANCE OF THIS PAGE IS INTENTIONALLY LEFT BLANK.]

                                      -20-
<PAGE>

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date and year first above written.

                                   PROBUSINESS SERVICES, INC.

                                   By: /s/ Thomas H. Sinton
                                       -----------------------------------------
                                   Name:   Thomas H. Sinton
                                   Title:  Chairman of the Board, President and
                                           Chief Executive Officer

                      [PURCHASER SIGNATURE PAGES TO FOLLOW]

<PAGE>

                                SIGNATURE PAGE TO

                         COMMON STOCK PURCHASE AGREEMENT

                          DATED AS OF DECEMBER 20, 2001

                                  BY AND AMONG

                           PROBUSINESS SERVICES, INC.

                        AND EACH PURCHASER NAMED THEREIN

        The undersigned hereby executes and delivers to ProBusiness Services,
Inc. the Common Stock Purchase Agreement (the "Agreement") to which this
Signature Page is attached effective as of the date of the Agreement, which
Agreement and Signature Page, together with all counterparts of such Agreement
and signature pages of the other Purchasers named in such Agreement, shall
constitute one and the same document in accordance with the terms of such
Agreement.

                                    Number of Shares: __________

                                    [PURCHASER]

                                    By: ________________________________________

                                    Name: ______________________________________

                                    Title: _____________________________________

                                    Address: ___________________________________
<PAGE>
                                   Exhibit A

                             Schedule of Purchasers

<TABLE>
<CAPTION>
                                             NUMBER OF SHARES
                                             OF COMMON STOCK    PRICE PER        AGGREGATE
NAME OF PURCHASER                               PURCHASED         SHARE        PURCHASE PRICE
-----------------                            ----------------   ---------      --------------
<S>                                          <C>                <C>            <C>
FIRST CLOSING

    Lone Spruce, L.P.                             18,000         $15.00            $270,000

    Lone Balsam, L.P.                             39,500         $15.00            $592,500

    Lone Sequoia, L.P.                            33,000         $15.00            $495,000

    Lone Cypress, Ltd.                           409,500         $15.00          $6,142,500

    Glenhill Capital L.P.                         80,726         $15.00          $1,210,890

    Glenhill Capital Overseas Partners            19,274         $15.00            $289,110
        Ltd.

    Blue Ridge Limited Partnership               200,000         $15.00          $3,000,000

    The Hare Investment Fund, L.P.                13,200         $15.00            $198,000

    The Fox Investment Fund                       37,700         $15.00            $565,500

    W.M. Keck Foundation                          58,500         $15.00            $877,500

    The Cypress Partners, L.P.                   310,300         $15.00          $4,654,500

    Cypress International Partners               180,300         $15.00          $2,704,500
        Limited

</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                             NUMBER OF SHARES
                                             OF COMMON STOCK    PRICE PER        AGGREGATE
NAME OF PURCHASER                               PURCHASED         SHARE        PURCHASE PRICE
-----------------                            ----------------   ---------      --------------
<S>                                          <C>                <C>            <C>
    The Glynn Emerging Opportunity                30,000         $15.00            $450,000
        Fund

    Bessemer Sand Hill Investor's                 60,000         $15.00            $900,000
        Fund

    Bessemer Sand Hill Investors                 115,000         $15.00          $1,725,000
        Fund II

    Far West Capital Partners L.P.               130,000         $15.00          $1,950,000

    Robert G. Schiro                              40,000         $15.00            $600,000

    Bridge & Co.                                 625,000         $15.00          $9,375,000

SECOND CLOSING

    General Atlantic Partners 74, L.P.         1,095,667         $15.00         $16,435,005

     GAP Star, LLC                                83,333         $15.00         $ 1,249,995

    GAPCO GmbH & Co. KG                            2,027         $15.00             $30,405

    GAP Coinvestment Partners II, L.P.           152,307         $15.00          $2,284,605

TOTAL                                          3,733,334                        $56,000,010
-----                                          =========                        ===========
</TABLE>

<PAGE>

                                    Exhibit B

                              Form of Legal Opinion

<PAGE>
                                                                               2

                                December 20, 2001

To the Purchasers Listed
on Schedule I hereto:

        RE:    PROBUSINESS SERVICES, INC. COMMON STOCK FINANCING

Ladies and Gentlemen:

        Reference is made to the Common Stock Purchase Agreement, dated as of
December 20, 2001 (the "Agreement"), by and among ProBusiness Services, Inc., a
Delaware corporation (the "Company"), and the purchasers listed on Exhibit A
thereto, which provides for the issuance by the Company of 2,400,000 shares of
Common Stock of the Company (the "Purchased Shares") on the date hereof to the
purchasers listed on Schedule I hereto (the "Purchasers"). This opinion is
rendered to you pursuant to Section 7(e) of the Agreement, and all terms used
herein have the meanings defined for them in the Agreement unless otherwise
defined herein.

        We have acted as counsel for the Company in connection with the
negotiation of the Agreement and the issuance of the Purchased Shares. As such
counsel, we have made such legal and factual examinations and inquiries as we
have deemed advisable or necessary for the purpose of rendering this opinion. In
addition, we have examined originals or copies of such corporate records of the
Company, certificates of public officials and such other documents which we
consider necessary or advisable for the purpose of rendering this opinion. In
such examination we have assumed the genuineness of all signatures on original
documents, the authenticity and completeness of all documents submitted to us as
originals, the conformity to original documents of all copies submitted to us
and the due execution and delivery of all documents (except as to due execution
and delivery by the Company) where due execution and delivery are a prerequisite
to the effectiveness thereof.

        For purposes of this opinion, we are assuming that you have all
requisite power and authority, and have taken any and all necessary corporate,
membership or partnership action, to execute and deliver the Agreement, and we
are assuming that the representations and warranties made by the Purchasers in
the Agreement and pursuant thereto are true and correct. We are also assuming
that the Purchasers have purchased the Purchased Shares for value, in good faith
and without notice of any adverse claims within the meaning of the California
Uniform Commercial Code. We are also assuming that the representations and
warranties made by the Company in the Agreement and pursuant thereto are true
and correct as to matters of fact and we are relying on such representations and
warranties as to matters of fact in rendering this opinion.

        The opinions hereinafter expressed are subject to the following
qualifications:

<PAGE>
                                                                               3

               (a) We express no opinion as to the effect of applicable
bankruptcy, insolvency, reorganization, moratorium or other similar federal or
state laws affecting the rights of creditors;

               (b) We express no opinion as to the effect of rules of law
governing specific performance, injunctive relief or other equitable remedies
(regardless of whether any such remedy is considered in a proceeding at law or
in equity);

               (c) We express no opinion as to  compliance  with the  anti-fraud
provisions of applicable securities laws;

               (d) We express no opinion as to the enforceability of the
indemnification provisions to the extent the provisions thereof may be subject
to limitations of public policy and the effect of applicable statutes and
judicial decisions;

               (e) We are members of the Bar of the State of California and we
express no opinion as to any matter relating to the laws of any jurisdiction
other than the federal laws of the United States of America, the laws of the
State of California and the General Corporation Law of the State of Delaware. To
the extent this opinion addresses applicable securities laws of states other
than the State of California, we have not retained nor relied on the opinion of
counsel admitted to the bar of such states, but rather have relied on
compilations of the securities laws of such states contained in reporting
services presently available to us; and

               (f) This opinion speaks only at and as of its date and is based
solely on the facts and circumstances known to us at and as of such date.

        Based upon and subject to the foregoing, and except as set forth in the
Schedule of Exceptions to the Agreement, we are of the opinion that:

        1. The Company is a corporation duly organized and validly existing
under, and by virtue of, the laws of the State of Delaware and is in good
standing under such laws. The Company has requisite corporate power to own and
operate its properties and assets, and to carry on its business as presently
conducted.

        2. The Company has all requisite legal and corporate power to execute
and deliver the Agreement, to sell and issue the Purchased Shares thereunder,
and to carry out and perform its obligations under the terms of the Agreement.

        3. All corporate action on the part of the Company and its directors
necessary for the authorization, execution and delivery of the Agreement by the
Company and the authorization, sale and issuance of the Purchased Shares has
been taken. The Agreement has been duly and validly executed and delivered by
the Company and constitutes a valid and binding obligation of the Company,
enforceable against the Company in accordance with its terms.

<PAGE>
                                                                               4

        4. No consent, approval or authorization of or designation, declaration
or filing with any governmental authority on the part of the Company is required
in connection with the valid execution and delivery of the Agreement, or the
offer, sale or issuance of the Purchased Shares, except (i) qualification (or
taking such action as may be necessary to secure an exemption from
qualification, if available) under the California Corporate Securities Law and
other applicable blue sky laws (but excluding jurisdictions outside of the
United States) of the offer and sale of the Purchased Shares, (ii) the filing of
a Form 8-K pursuant to Section 13 of the Securities Exchange Act of 1934, as
amended, and (iii) the filing of a notification form with The Nasdaq Stock
Market. Our opinion herein is otherwise subject to the timely and proper
completion of all filings and other actions contemplated herein where such
filings and actions are to be undertaken on or after the date hereof.

        5. The Purchased Shares have been duly authorized and, when issued and
paid for in accordance with the terms of the Agreement, will be validly issued,
fully paid and nonassessable by the Company.

        6. The  execution  and delivery of the Agreement and the issuance of the
Purchased   Shares  do  not  violate  any  provision  of  the   Certificate   of
Incorporation, as amended, or Bylaws, as amended

        7. Subject to the accuracy of the Purchasers' representations in Section
4 of the Agreement, we are of the opinion that the offer and sale of the
Purchased Shares in conformity with the terms of the Agreement constitute
transactions exempt from the registration requirements of Section 5 of the
Securities Act of 1933, as amended. This opinion is furnished to the Purchasers
solely for their benefit in connection with the purchase of the Purchased
Shares, and may not be relied upon by any other person or for any other purpose
without our prior written consent.

                                                   Very truly yours,

                                                   WILSON, SONSINI,
                                                   GOODRICH & ROSATI
                                                   Professional Corporation
<PAGE>
                                                                               5

                                   Schedule I

    Lone Spruce, L.P.
    Lone Balsam, L.P.
    Lone Sequoia, L.P.
    Lone Cypress, Ltd.
    Glenhill Capital L.P.
    Glenhill Capital Overseas Partners Ltd.
    Blue Ridge Limited Partnership
    The Hare Investment Fund, L.P.
    The Fox Investment Fund
    W.M. Keck Foundation
    The Cypress Partners, L.P.
    Cypress International Partners Limited
    The Glynn Emerging Opportunity Fund
    Bessemer Sand Hill Investor's Fund
    Bessemer Sand Hill Investors Fund II
    Far West Capital Partners L.P.
    Robert G. Schiro
    Bridge & Co.

<PAGE>
                                                                               6

                                    Exhibit C

                            Form of Escrow Agreement

<PAGE>
                                                                               7

                                ESCROW AGREEMENT

               ESCROW AGREEMENT, dated December ___, 2001 (this "Escrow
Agreement"), by and among General Atlantic Partners 74, L.P., a Delaware limited
partnership, GAP Star, LLC, a Delaware limited liability company, GAPCO GmbH &
Co. KG, a German limited partnership, and GAP Coinvestment Partners II, L.P., a
Delaware limited partnership (collectively, the "GAP Purchasers"), ProBusiness
Services, Inc., a Delaware corporation ("Seller"), and [INSERT NAME OF ESCROW
AGENT], as Escrow Agent (the "Escrow Agent").

               WHEREAS, the GAP Purchasers and Seller are parties to the Stock
Purchase Agreement, dated as of December 20, 2001, (the "Purchase Agreement"),
pursuant to which the GAP Purchasers are acquiring from Seller an aggregate of
1,333,334 common stock, par value $0.001 per share, of Seller (the "Common
Stock");

               WHEREAS, the Purchase Agreement provides for the escrow hereby
established to be held by the Escrow Agent; and

               WHEREAS, capitalized terms used herein, unless otherwise
indicated, have the respective meanings ascribed to them in the Purchase
Agreement.

               Accordingly, the parties agree as follows:

               1.     Establishment of Escrow.

                      1.1 Escrow Deposit.

                             1.1.1 On December ___, 2001, pursuant to Section
1(c) of the Purchase Agreement, the GAP Purchasers will deposit with the Escrow
Agent $20,000,010 representing the entire purchase price payable by the GAP
Purchasers pursuant to Section 1(c) of the Purchase Agreement for the Purchased
Shares (the "Purchasers' Deposit") to be held by the Escrow Agent and disbursed
in accordance with the terms hereof.

                             1.1.2 On December ___, 2001, pursuant to Section
1(c) of the Purchase Agreement, Seller will deposit with the Escrow Agent an
instruction letter to Wells Fargo Shareowner Services, its transfer agent,
instructing such transfer agent to issue on the Escrow Release Date stock
certificates in definitive form representing the number of Purchased Shares set
forth opposite each GAP Purchaser's name on Exhibit A to the Purchase Agreement,
registered in the name of such GAP Purchasers, and on the Escrow Release Date,
but prior to the distributions contemplated by Section 3, the Seller shall
further deposit with the Escrow Agent such duly issued and dated stock
certificates representing the Purchased Shares (the "Seller's Deposit" and,
together with the Purchasers' Deposit, the "Deposit").

                             1.1.3 The Escrow Agent acknowledges receipt of and
agrees to accept the Deposit and establish and maintain a separate account for
each GAP

<PAGE>
                                                                               8

Purchaser's cash portion of the Purchasers' Deposit as provided herein (the
"Escrow Account").

               2. Investment of Purchasers' Deposit.

                      2.1 Investment. The Escrow Agent shall invest any or all
of the Purchasers' Deposit and any income or interest earned or accrued with
respect thereto only in time deposits and certificates of deposit of any
commercial bank incorporated in the United States of America of recognized
standing having capital and surplus in excess of $50,000,000. Except as
otherwise provided in Section 5.3, in no event shall the Escrow Agent have any
liability for any investment hereunder, including, without limitation, any loss
of the principal amount of any investment or in connection with the rate of
return on any investment.

                      2.2 Distribution of Interest. All interest accrued from
the date hereof to and including the Escrow Release Date (as defined below) on
investments made pursuant to Section 2.1 shall be for the account of each of the
GAP Purchasers. On the Escrow Release Date, the Escrow Agent shall distribute to
each of the GAP Purchasers all interest then accrued for the account of each of
the GAP Purchasers pursuant to this Section 2.2 and not theretofore distributed
hereunder.

               3. Distributions from the Escrow.

                      3.1 Distributions.

                             3.1.1 Upon satisfaction or waiver of the conditions
set forth in Section 9 and 10 of the Purchase Agreement (the "Escrow Release
Conditions"), the GAP Purchasers and Seller shall each execute and deliver to
the Escrow Agent a certificate directing the Escrow Agent to take the action
specified in Section 3.1.2 (the "Distribution Certificate").

                             3.1.2 Upon receipt by the Escrow Agent of a
Distribution Certificate signed by the GAP Purchasers and the Seller stating
that the Escrow Release Conditions have been satisfied, the Escrow Agent shall
promptly, but in any case on the business day following receipt thereof, (i)
distribute to Seller the Purchasers' Deposit and (ii) deliver to the GAP
Purchasers the Seller's Deposit and the interest on the Purchasers' Deposit
payable pursuant to Section 2.2 of this Escrow Agreement.

                             3.1.3 For purposes of this Escrow Agreement, the
"Escrow Release Date" shall mean the date upon which the Distribution
Certificate is delivered by the GAP Purchasers and the Seller.

                             3.1.4 On the earlier of (i) receipt of a joint
notice executed by all of the GAP Purchasers and Seller or (ii) 150 days after
the Closing Date (the "Escrow Termination Date"), the Escrow Agent shall return
the Purchaser's Deposit to the GAP Purchasers and the Seller's Deposit to
Seller.

<PAGE>
                                                                               9

                      3.2 Dispute Notice.

                             3.2.1 If, prior to the Escrow Termination Date,
either the GAP Purchasers or the Seller delivers written notice to the other
party and to the Escrow Agent, that such party has determined that the
conditions set forth in Sections 9 and 10 of the Purchase Agreement have been
satisfied (the "Dispute Notice"), with the basis for such determination set
forth in reasonable detail, the Dispute Notice shall constitute full authority
to the Escrow Agent to take the action provided for in this Section 3.1.1 and
shall be conclusive on all parties hereto. Upon receipt of a Dispute Notice, the
Escrow Agent shall not transfer the Deposit to either the GAP Purchasers or the
Seller until either (i) the Escrow Agent receives a Distribution Certificate
executed by the GAP Purchasers and the Seller, or (ii) there is a final decision
of an arbitrator and the Escrow Agent receives the written final decision in
accordance with Section 3.1.2 hereof. A transfer pursuant to section (ii) of the
preceding sentence shall be in accordance with such final decision. In the event
that a Dispute Notice has been delivered in accordance with this Section 3.1.1,
the provisions of Section 3.1.4(ii) shall not apply and the Escrow Agent shall
not transfer the Deposit to either the GAP Purchasers or the Seller until either
of the conditions set forth in this Section 3.1.1(i) or 3.1.1(ii) have been met.

                             3.2.2 If a Dispute Notice is delivered in
accordance with Section 3.1.1, then the GAP Purchasers and the Seller shall use
their best efforts to resolve such dispute in a timely manner. In the event of
resolution of such dispute, the GAP Purchasers and the Seller shall both execute
a Distribution Certificate setting forth such resolution, shall furnish such
Distribution Certificate to the Escrow Agent and the Escrow Agent shall make the
distribution in the manner specified in such Distribution Certificate. In the
event that the GAP Purchasers and the Sellers are unable to resolve such dispute
within fifteen calendar days from the Escrow Agent's receipt of any Dispute
Notice, then either party may demand, by written notice to the other, that such
issue shall be settled by binding arbitration to be held in New York, New York
(an "Arbitration Demand"). All claims shall be resolved by an arbitrator
experienced in matters of corporate finance in accordance with the Commercial
Arbitration Rules then in effect of the American Arbitration Association (the
"Arbitration Rules"), except as set forth below. The GAP Purchasers and the
Seller shall agree on the arbitrator or the arbitrator shall be selected by the
President of the American Arbitration Association within fifteen (15) calendar
days after the delivery of the Arbitration Demand. The GAP Purchasers and the
Company shall each submit written memorandum to the arbitrator and there shall
be no hearing or oral testimony. The final decision of the arbitrator shall be
furnished to the GAP Purchasers, the Seller and the Escrow Agent in writing. The
GAP Purchasers and the Seller shall each bear its own fees (including attorney's
fees) and other expenses associated with the arbitration, including fifty
percent of the fees of the arbitrator. However, the arbitrator shall have the
discretion to declare one party the prevailing party such that the
non-prevailing party bears all costs associated with such arbitration. The GAP
Purchasers and the Seller hereby accept that the decision of the arbitrator
shall be final and binding for both of them.

                      3.3 Tax Reporting. Seller and each of the GAP Purchasers
shall provide the Escrow Agent with its Tax Identification Number (TIN) as
assigned by the

<PAGE>
                                                                              10

Internal Revenue Service. All interest or other income earned under this Escrow
Agreement shall be allocated and paid as provided herein and reported by the
recipient to the Internal Revenue Service as having been so allocated and paid.

               4. Termination of this Escrow Agreement. This Escrow Agreement
shall terminate upon the distribution or return of all of the Purchasers'
Deposit, all of Seller's Deposit and all other sums and documents held by the
Escrow Agent pursuant to this Escrow Agreement.

               5. Duties of Escrow Agent.

                      5.1 Duties Limited. The Escrow Agent shall perform only
the duties expressly set forth herein, and shall not have any liability under,
or duty to inquire into, the terms and provisions of any other agreement,
including but not limited to the Purchase Agreement, except as expressly set
forth herein, in performing its duties hereunder. Except as to the due execution
and delivery of this Escrow Agreement by a duly authorized officer, the Escrow
Agent has no responsibility as to the validity of this Escrow Agreement or any
document related thereto.

                      5.2 Reliance. The Escrow Agent may rely upon, and shall
incur no liability for acting or refraining from acting upon, any written
notice, instruction, request, consent, certificate, statement or other document
furnished to it pursuant to this Escrow Agreement and believed in good faith by
it to be genuine and to have been signed or presented by the proper party or
parties, and the Escrow Agent shall be under no duty to inquire into or
investigate the validity, accuracy or content of any such document.

                      5.3 Good Faith. In no event shall the Escrow Agent have
any liability for any error of judgment or for any act done or omitted by it in
good faith, or for any mistake of fact or law, or for anything which it may do
or refrain from doing hereunder, except for its own gross negligence or willful
misconduct arising out of or in connection with this Escrow Agreement. The GAP
Purchasers and Seller agree to severally indemnify the Escrow Agent for, and
defend and hold it harmless against, any loss, liability or expense arising out
of or in connection with its actions as Escrow Agent hereunder, including the
reasonable costs and expenses incurred in defending any such claim of liability,
except that none of the GAP Purchasers or the Seller shall be liable for any
loss, liability or expense incurred on account of the gross negligence or
willful misconduct on the part of the Escrow Agent. The Escrow Agent may consult
with counsel from time to time and the opinion of such counsel shall be full and
complete authorization and protection in respect of any action taken or omitted
to be taken by the Escrow Agent hereunder in good faith and in accordance with
the opinion of such counsel.

                      5.4 Limited Notice. The Escrow Agent shall be deemed to
have no notice of, or duties with respect to, any agreement or agreements
(whether or not a copy thereof is delivered to the Escrow Agent), other than as
expressly set forth herein.

<PAGE>
                                                                              11

                      5.5 Limited Actions. The Escrow Agent shall not take any
action by reason of any notice or instruction given by any of the parties or by
any other person, firm or corporation, except only (i) such notices or
instructions as are herein specifically provided for and (ii) orders or process
of any court entered or issued with competent jurisdiction. In the event that
the Escrow Agent shall be uncertain as to its duties or rights hereunder, it
shall be entitled to refrain from taking any action until it shall be directed
otherwise in writing by each of the GAP Purchasers and Seller or by an order of
a court of competent jurisdiction.

                      5.6 Conflicts.

                             5.6.1 In the event that any of the terms and
provisions of any other agreement between any of the parties conflict or are
inconsistent with any of the terms and provisions of this Escrow Agreement, the
terms and provisions of this Escrow Agreement shall govern and control in all
respects the duties and liabilities of the Escrow Agent.

                             5.6.2 In the event that the Escrow Agent shall be
uncertain as to its duties or rights hereunder or shall receive instructions,
claims or demands from any party hereto which, in its opinion, conflict with any
of the provisions of this Escrow Agreement, it shall be entitled to refrain from
taking any action and its sole obligation shall be to keep safely all property
held in escrow until it shall be directed otherwise in writing by all of the
other parties hereto or by a final order or judgment of a court of competent
jurisdiction.

<PAGE>
                                                                              12

               6. Resignation; Successor Escrow Agent.

                      6.1 Resignation. The Escrow Agent may resign at any time
by giving 30 days' prior written notice of such resignation to the GAP
Purchasers and Seller. On the 30th day following delivery of such notice, the
Escrow Agent shall have no further obligation hereunder except to hold the
Deposit and any other amounts and documents held by it pursuant to this Escrow
Agreement as depositary. After resignation, the Escrow Agent shall have no
further obligation to invest amounts then in the Deposit (absent written
instructions with respect thereto executed by the Seller and the GAP Purchasers)
and shall not take any action until the GAP Purchasers and Seller have jointly
designated a successor escrow agent. If the GAP Purchasers and Seller are unable
to agree upon a successor escrow agent within 30 days of receipt of notice from
the Escrow Agent, the Escrow Agent may designate its successor, and if the
Escrow Agent declines to designate its successor, the GAP Purchasers shall
designate the successor escrow agent. In each of the foregoing cases, the
successor escrow agent shall be a bank or trust company organized under the laws
of the United State of America or of the State of California and having a
combined capital and surplus of not less than $100,000,000. The Escrow Agent
shall promptly deliver the Deposit and any other amounts and documents held by
it pursuant to this Escrow Agreement to such successor escrow agent and upon the
successor escrow agent's delivery to the GAP Purchasers and the Seller of a
written instrument accepting such appointment hereunder, the Escrow Agent shall
thereafter have no further obligations hereunder. Upon receipt of the Deposit
and other amounts and documents and upon its written acceptance of such
appointment, the successor escrow agent shall thereupon be bound by all of the
provisions hereof.

                      6.2 Termination. The GAP Purchasers and Seller acting
jointly may terminate the appointment of the Escrow Agent hereunder upon notice
specifying the date upon which such termination shall take effect. In the event
of such termination, the GAP Purchasers and Seller shall jointly appoint and
designate in such termination notice a successor escrow agent and the Escrow
Agent shall turn over to such successor escrow agent the Deposit and any other
amounts and documents held by it pursuant to this Escrow Agreement. Upon receipt
of the Deposit and other amounts and documents and its acceptance thereof, the
successor escrow agent shall thereupon be bound by all of the provisions hereof,
and the Escrow Agent shall have no further obligations hereunder.

               7. Fees and Expenses of Escrow Agent. The GAP Purchasers and
Seller shall each pay directly to the Escrow Agent one half of the Escrow
Agent's reasonable fees for the Escrow Agent's services hereunder and all
expenses, disbursements and advances (including reasonable attorneys' fees)
incurred in carrying out the Escrow Agent's duties hereunder.

               8. Miscellaneous.

                      8.1 Notices. Any notice or other communication required or
permitted hereunder shall be in writing and shall be delivered personally,
telegraphed, sent by facsimile transmission, overnight delivery service or
certified, registered or express mail, postage prepaid. Any such notice shall be
deemed given when so delivered

<PAGE>
                                                                              13

personally, telegraphed or sent by facsimile transmission, or by overnight
delivery service, one day after the date of deposit to such overnight delivery
service or, if mailed, three days after the date of deposit in the United States
mail, as follows:

                      if to Seller:

                      ProBusiness Services, Inc.
                      4125 Hopyard Road
                      Pleasanton, CA 94105
                      Attention:  Chief Financial Officer
                      Telecopy:  (925) 737-3500

                      with a copy to:

                      Wilson Sonsini Goodrich & Rosati
                      Professional corporation
                      650 Page Mill Road
                      Palo Alto, CA 94304
                      Attention:  Elizabeth R. Flint
                      Telecopy:  (650) 493-9300

<PAGE>
                                                                              14

                      if to the GAP Purchasers:

                      c/o General Atlantic Service Corporation
                      3 Pickwick Plaza
                      Greenwich, CT 06830
                      Telecopy:  (203) 622-8818
                      Attention:  Matthew Nimetz

                      with a copy to:

                      Paul, Weiss, Rifkind, Wharton & Garrison
                      1285 Avenue of the Americas
                      New York, New York  10019-6064
                      Attention: Douglas A. Cifu, Esq.
                      Telecopy:  (212) 757-3990

                      if to the Escrow Agent:

                      [INSERT ESCROW AGENT'S ADDRESS]

Any party may by notice given in accordance with this Section 8.1 to the other
parties designate another address for receipt of notices hereunder. If any
notice is required to be given to both the Escrow Agent and another party, such
notice shall be given in a manner that results in the same effective date for
each such notice.

                             8.1.1 In the event funds transfer instructions are
given (other than in writing at the time of execution of this Escrow Agreement),
whether in writing, by telecopier or otherwise, the Escrow Agent is authorized
to seek confirmation of such instructions by telephone call-back to the person
or persons designated in Section 8.1 above, and the Escrow Agent may rely upon
the confirmations of anyone purporting to be the person or persons so
designated. The persons and telephone numbers for call-backs may be changed only
in a writing actually received and acknowledged by the Escrow Agent. The parties
to this Escrow Agreement acknowledge that such security procedure is
commercially reasonable.

                      8.2 Entire Agreement. This Escrow Agreement is entered
into and delivered pursuant to the Purchase Agreement and sets forth the entire
agreement among the parties with respect to the subject matter hereof and
supersedes all prior agreements, written or oral, with respect thereto.

                      8.3 Governing Law. This Escrow Agreement shall be governed
and construed in accordance with the laws of the State of California without
regard to its principles of conflicts of laws.

<PAGE>
                                                                              15

                      8.4 Binding Effect. This Escrow Agreement shall be binding
upon and inure to the benefit of the parties and their respective heirs, legal
representatives, successors and assigns.

                      8.5 Waivers and Amendments. This Escrow Agreement may be
amended, modified, superseded, cancelled, renewed or extended, and the terms or
conditions hereof may be waived, only by a written instrument signed by the
parties, or, in the case of a waiver, by the party waiving compliance. No delay
on the part of any party in exercising any right, power or privilege hereunder
shall operate as a waiver thereof, nor shall any waiver on the part of any party
of any right, power or privilege hereunder, nor any single or partial exercise
of any right, power or privilege hereunder, preclude any other or further
exercise thereof or the exercise of any other right, power or privilege
hereunder.

                      8.6 Counterparts. This Escrow Agreement may be executed in
two or more counterparts, each of which shall be deemed an original but all of
which together shall constitute one and the same instrument.

                      8.7 Further Assurances. Each of the parties shall execute
such documents and other papers and take such further actions as may be
reasonably required or desirable to carry out the provisions hereof and the
transactions contemplated hereby.

                      8.8 Variations in Pronouns. All pronouns and any
variations thereof refer to the masculine, feminine or neuter, singular or
plural, as the identity of the person or persons may require.

                      8.9 Headings. The headings in this Escrow Agreement are
for reference purposes only and shall not in any way affect the meaning or
interpretation of this Escrow Agreement.

<PAGE>
                                                                              16

               IN WITNESS WHEREOF, the parties have caused this Escrow Agreement
to be executed on the date first written above.

                               GENERAL ATLANTIC PARTNERS 74, L.P.
                               By: General Atlantic Partners, LLC,
                                   its General Partner

                               By:
                                  ----------------------------------------------
                               Name:
                               Title: A Managing Member

                               GAPSTAR, LLC
                               By: General Atlantic Partners, LLC,
                                   its Managing Member

                               By:
                                  ----------------------------------------------
                               Name:
                               Title: A Managing Member

                               GAPCO GMBH & CO. KG
                               By: GAPCO Management GmbH

                               By:
                                  ----------------------------------------------
                               Name:
                               Title: A Managing Member

                               GAP COINVESTMENT PARTNERS II, L.P.

                               By:
                                  ----------------------------------------------
                               Name:
                               Title: A General Partner

                               PROBUSINESS SERVICES, INC.

                               By:
                                  ----------------------------------------------
                               Name:
                               Title:
                               Address for Notice to ProBusiness Services, Inc.:
                               [ESCROW AGENT]
                               Escrow Agent

                               By:
                                  ----------------------------------------------
                               Name:
                               Title:

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