Document:

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                                                                   EXHIBIT 10.13

                                HANDSPRING, INC.
                         (FORMERLY JD TECHNOLOGY, INC.)

                           1998 EQUITY INCENTIVE PLAN

                             STOCK OPTION AGREEMENT

       This Stock Option Agreement (the "AGREEMENT") is made and entered into as
of the date of grant set forth below (the "DATE OF GRANT") by and between
Handspring, Inc. (formerly JD Technology, Inc.), a California corporation (the
"COMPANY"), and the participant named below (the "PARTICIPANT"). Capitalized
terms not defined herein shall have the meaning ascribed to them in the
Company's 1998 Equity Incentive Plan (the "PLAN").

PARTICIPANT:                                Edward Colligan
                                            ------------------------------------

SOCIAL SECURITY NUMBER:                     ------------------------------------

ADDRESS:
                                            ------------------------------------

                                            ------------------------------------
TOTAL OPTION SHARES:                        1,346,154
                                            ------------------------------------
EXERCISE PRICE PER SHARE:                   $0.23
                                            ------------------------------------
DATE OF GRANT:                              October 12, 1998
                                            ------------------------------------
FIRST VESTING DATE:                         October 8, 1999
                                            ------------------------------------

EXPIRATION DATE:                            October 11, 2008
                                            ------------------------------------
                                            (unless earlier terminated under
                                            Section 5.6 of the Plan)
TYPE OF STOCK OPTION
(CHECK ONE):                                [X] INCENTIVE STOCK OPTION
                                            [ ] NONQUALIFIED STOCK OPTION

         1. GRANT OF OPTION. The Company hereby grants to Participant an option
(this "OPTION") to purchase the total number of shares of Common Stock of the
Company set forth above as Total Option Shares (the "SHARES") at the Exercise
Price Per Share set forth above (the "EXERCISE PRICE"), subject to all of the
terms and conditions of this Agreement and the Plan. If designated as an
Incentive Stock Option above, the Option is intended to qualify as an "incentive
stock option" (the "ISO") within the meaning of Section 422 of the Internal
Revenue Code of 1986, as amended (the "CODE").

         2. EXERCISE PERIOD.

                  2.1 Exercise Period of Option. This Option is immediately
exercisable although the Shares issued upon exercise of the Option will be
subject to the restrictions on transfer and Repurchase Options set forth in
Sections 7, 8 and 9 below. Provided Participant continues to provide services to
the Company or to any Parent or Subsidiary of the Company, the Shares issuable
upon exercise of this Option will become vested with respect to twenty-five
percent (25%) of the Shares on October 8, 1999 (the "FIRST VESTING DATE") and

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thereafter at the end of each full succeeding month after the First Vesting Date
an additional 2.08333% of the Shares will become vested until the Shares are
vested with respect to one hundred percent (100%) of the Shares. If application
of the vesting percentage causes a fractional share, such share shall be rounded
down to the nearest whole share for each month except for the last month in such
vesting period, at the end of which last month this Option shall become
exercisable for the full remainder of the Shares. Unvested Shares (as defined in
Section 2.2 of this Agreement) may not be sold or otherwise transferred by
Participant without the Company's prior written consent. Notwithstanding any
provision in the Plan or this Agreement to the contrary, Options for Unvested
Shares will not be exercisable on or after Participant's Termination Date.

In the event of an Acquisition Event (as defined herein), then immediately prior
to such event, twenty-five percent (25%) of the shares issued or issuable upon
exercise of the incentive stock options granted herein to Edward Colligan
immediately become vested and will no longer be subject to the Company's
Repurchase Option for Unvested Shares set forth in Section 8 of this Agreement.
Any Unvested Shares will continue to vest on the original vesting schedule. The
term "ACQUISITION EVENT" means the (i) any consolidation or merger of the
Company with or into any other corporation or corporations in which the holders
of the Company's outstanding shares immediately before such consolidation or
merger do not, immediately after such consolidation or merger, retain stock
representing a majority of the voting power of the surviving corporation of such
consolidation or merger or stock representing a majority of the voting power of
a corporation that wholly owns, directly or indirectly, the surviving
corporation of such consolidation or merger; (ii) the sale, transfer or
assignment of securities of the Company representing a majority of the voting
power of all the Company's outstanding voting securities by the holders thereof
to an acquiring party in a single transaction or series of related transactions;
(iii) any other sale, transfer or assignment of securities of the Company
representing over two-thirds (2/3) of the voting power of the Company's then
outstanding voting securities by the holders thereof to an acquiring party; or
(iv) the sale of all or substantially all the Company's assets.

                  2.2 Vesting of Options. Shares that are vested pursuant to the
schedule set forth in Section 2.1 are "VESTED SHARES." Shares that are not
vested pursuant to the schedule set forth in Section 2.1 are "UNVESTED SHARES."

                  2.3 Expiration. The Option shall expire on the Expiration Date
set forth above or earlier as provided in Section 3 below or pursuant to Section
5.6 of the Plan.

         3. TERMINATION.

                  3.1 Termination for Any Reason Except Death, Disability or
Cause. If Participant is Terminated for any reason, except death, Disability or
for Cause, the Option, to the extent (and only to the extent) that it would have
been exercisable by Participant on the Termination Date, may be exercised by
Participant no later than three (3) months after the Termination Date, but in
any event no later than the Expiration Date.

                  3.2 Termination Because of Death or Disability. If Participant
is Terminated because of death or Disability of Participant (or Participant dies
within three (3) months of Termination when Termination is for any reason other
than Participant's Disability or

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for Cause), the Option, to the extent that it is exercisable by Participant on
the Termination Date, may be exercised by Participant (or Participant's legal
representative) no later than twelve (12) months after the Termination Date, but
in any event no later than the Expiration Date. Any exercise beyond (i) three
(3) months after the Termination Date when the Termination is for any reason
other than the Participant's death or disability, within the meaning of Section
22(e)(3) of the Code; or (ii) twelve (12) months after the Termination Date when
the termination is for Participant's disability, within the meaning of Section
22(e)(3) of the Code, is deemed to be an NQSO.

                  3.3 Termination for Cause. If Participant is Terminated for
Cause, then the Option will expire on Participant's Termination Date, or at such
later time and on such conditions as are determined by the Committee.

                  3.4 No Obligation to Employ. Nothing in the Plan or this
Agreement shall confer on Participant any right to continue in the employ of, or
other relationship with, the Company or any Parent or Subsidiary of the Company,
or limit in any way the right of the Company or any Parent or Subsidiary of the
Company to terminate Participant's employment or other relationship at any time,
with or without Cause.

         4. MANNER OF EXERCISE.

                  4.1 Stock Option Exercise Agreement. To exercise this Option,
Participant (or in the case of exercise after Participant's death or incapacity,
Participant's executor, administrator, heir or legatee, as the case may be) must
deliver to the Company an executed stock option exercise agreement in the form
attached hereto as Exhibit A, or in such other form as may be approved by the
Committee from time to time (the "EXERCISE AGREEMENT"), which shall set forth,
inter alia, (i) Participant's election to exercise the Option, (ii) the number
of Shares being purchased, (iii) any restrictions imposed on the Shares and (iv)
any representations, warranties and agreements regarding Participant's
investment intent and access to information as may be required by the Company to
comply with applicable securities laws. If someone other than Participant
exercises the Option, then such person must submit documentation reasonably
acceptable to the Company verifying that such person has the legal right to
exercise the Option.

                  4.2 Limitations on Exercise. The Option may not be exercised
unless such exercise is in compliance with all applicable federal and state
securities laws, as they are in effect on the date of exercise. The Option may
not be exercised as to fewer than one hundred (100) Shares unless it is
exercised as to all Shares as to which the Option is then exercisable.

                  4.3 Payment. The Exercise Agreement shall be accompanied by
full payment of the Exercise Price for the shares being purchased in cash (by
check), or where permitted by law:

         (a)      by cancellation of indebtedness of the Company to the
                  Participant;

         (b)      by surrender of shares of the Company's Common Stock that (i)
                  either (A) have been owned by Participant for more than six
                  (6) months and have been paid for within the meaning of SEC
                  Rule 144 (and, if such shares were purchased from the Company
                  by use of a promissory note, such note

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                  has been fully paid with respect to such shares); or (B) were
                  obtained by Participant in the open public market; and (ii)
                  are clear of all liens, claims, encumbrances or security
                  interests;

         (c)      by waiver of compensation due or accrued to Participant for
                  services rendered;

         (d)      provided that a public market for the Company's stock exists:
                  (i) through a "same day sale" commitment from Participant and
                  a broker-dealer that is a member of the National Association
                  of Securities Dealers (an "NASD DEALER") whereby Participant
                  irrevocably elects to exercise the Option and to sell a
                  portion of the Shares so purchased sufficient to pay for the
                  total Exercise Price and whereby the NASD Dealer irrevocably
                  commits upon receipt of such Shares to forward the total
                  Exercise Price directly to the Company, or (ii) through a
                  "margin" commitment from Participant and an NASD Dealer
                  whereby Participant irrevocably elects to exercise the Option
                  and to pledge the Shares so purchased to the NASD Dealer in a
                  margin account as security for a loan from the NASD Dealer in
                  the amount of the total Exercise Price, and whereby the NASD
                  Dealer irrevocably commits upon receipt of such Shares to
                  forward the total Exercise Price directly to the Company; or

         (e)      by any combination of the foregoing.

                  4.4 Tax Withholding. Prior to the issuance of the Shares upon
exercise of the Option, Participant must pay or provide for any applicable
federal, state and local withholding obligations of the Company. If the
Committee permits, Participant may provide for payment of withholding taxes upon
exercise of the Option by requesting that the Company retain Shares with a Fair
Market Value equal to the minimum amount of taxes required to be withheld. In
such case, the Company shall issue the net number of Shares to the Participant
by deducting the Shares retained from the Shares issuable upon exercise.

                  4.5 Issuance of Shares. Provided that the Exercise Agreement
and payment are in form and substance satisfactory to counsel for the Company,
the Company shall issue the Shares registered in the name of Participant,
Participant's authorized assignee, or Participant's legal representative, and
shall deliver certificates representing the Shares with the appropriate legends
affixed thereto.

         5. NOTICE OF DISQUALIFYING DISPOSITION OF ISO SHARES. If the Option is
an ISO, and if Participant sells or otherwise disposes of any of the Shares
acquired pursuant to the ISO on or before the later of (i) the date two (2)
years after the Date of Grant, and (ii) the date one (1) year after transfer of
such Shares to Participant upon exercise of the Option, Participant shall
immediately notify the Company in writing of such disposition. Participant
agrees that Participant may be subject to income tax withholding by the Company
on the compensation income recognized by Participant from the early disposition
by payment in cash or out of the current wages or other compensation payable to
Participant.

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         6. COMPLIANCE WITH LAWS AND REGULATIONS. The Plan and this Agreement
are intended to comply with Section 25102(o) of the California Corporations Code
and any regulations relating thereto. Any provision of this Agreement which is
inconsistent with Section 25102(o) or any regulations relating thereto shall,
without further act or amendment by the Company or the Board, be reformed to
comply with the requirements of Section 25102(o) and any regulations relating
thereto. The exercise of the Option and the issuance and transfer of Shares
shall be subject to compliance by the Company and Participant with all
applicable requirements of federal and state securities laws and with all
applicable requirements of any stock exchange on which the Company's Common
Stock may be listed at the time of such issuance or transfer. Participant
understands that the Company is under no obligation to register or qualify the
Shares with the SEC, any state securities commission or any stock exchange to
effect such compliance.

         7. NONTRANSFERABILITY OF OPTION. The Option may not be transferred in
any manner other than by will or by the laws of descent and distribution and may
be exercised during the lifetime of Participant only by Participant or in the
event of Participant's incapacity, by Participant's legal representative. The
terms of the Option shall be binding upon the executors, administrators,
successors and assigns of Participant.

         8. COMPANY'S REPURCHASE OPTION FOR UNVESTED SHARES. The Company, or its
assignee, shall have the option to repurchase Participant's Unvested Shares (as
defined in Section 2.2 of this Agreement) on the terms and conditions set forth
in the Exercise Agreement (the "REPURCHASE OPTION") if Participant is Terminated
(as defined in the Plan) for any reason, or no reason, including without
limitation Participant's death, Disability (as defined in the Plan), voluntary
resignation or termination by the Company with or without Cause. Notwithstanding
the foregoing, the Company shall retain the Repurchase Option for Unvested
Shares only as to that number of Unvested Shares (whether or not exercised) that
exceeds the number of shares which remain unexercised.

         9. COMPANY'S RIGHT OF FIRST REFUSAL. Unvested Shares may not be sold or
otherwise transferred by Participant without the Company's prior written
consent. Before any Vested Shares held by Participant or any transferee of such
Vested Shares may be sold or otherwise transferred (including without limitation
a transfer by gift or operation of law), the Company and/or its assignee(s)
shall have an assignable right of first refusal to purchase the Vested Shares to
be sold or transferred on the terms and conditions set forth in the Exercise
Agreement (the "RIGHT OF FIRST REFUSAL"). The Company's Right of First Refusal
will terminate when the Company's securities become publicly traded.

         10. TAX CONSEQUENCES. Set forth below is a brief summary as of the
Effective Date of the Plan of some of the federal and California tax
consequences of exercise of the Option and disposition of the Shares. THIS
SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX LAWS AND REGULATIONS ARE SUBJECT
TO CHANGE. PARTICIPANT SHOULD CONSULT A TAX ADVISER BEFORE EXERCISING THE OPTION
OR DISPOSING OF THE SHARES.

                  10.1 Exercise of ISO. If the Option qualifies as an ISO, there
will be no regular federal or California income tax liability upon the exercise
of the Option, although the excess, if any, of the Fair Market Value of the
Shares on the date of exercise over the Exercise

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Price will be treated as a tax preference item for federal alternative minimum
tax purposes and may subject the Participant to the alternative minimum tax in
the year of exercise.

                  10.2 Exercise of Nonqualified Stock Option. If the Option does
not qualify as an ISO, there may be a regular federal and California income tax
liability upon the exercise of the Option. Participant will be treated as having
received compensation income (taxable at ordinary income tax rates) equal to the
excess, if any, of the Fair Market Value of the Shares on the date of exercise
over the Exercise Price. If Participant is a current or former employee of the
Company, the Company may be required to withhold from Participant's compensation
or collect from Participant and pay to the applicable taxing authorities an
amount equal to a percentage of this compensation income at the time of
exercise.

                  10.3 Disposition of Shares. The following tax consequences may
apply upon disposition of the Shares.

                           (a) Incentive Stock Options. If the Shares are held
for more than twelve (12) months after the date of the transfer of the Shares
pursuant to the exercise of an ISO and are disposed of more than two (2) years
after the Date of Grant, any gain realized on disposition of the Shares will be
treated as long term capital gain for federal and California income tax
purposes. If Shares purchased under an ISO are disposed of within the applicable
one (1) year or two (2) year period, any gain realized on such disposition will
be treated as compensation income (taxable at ordinary income rates) to the
extent of the excess, if any, of the Fair Market Value of the Shares on the date
of exercise over the Exercise Price.

                           (b) Nonqualified Stock Options. If the Shares are
held for more than twelve (12) months after the date of the transfer of the
Shares pursuant to the exercise of an NQSO, any gain realized on disposition of
the Shares will be treated as long term capital gain.

                           (c) Withholding. The Company may be required to
withhold from the Participant's compensation or collect from the Participant and
pay to the applicable taxing authorities an amount equal to a percentage of this
compensation income.

                  10.4. Section 83(b) Election for Unvested Shares. With respect
to Unvested Shares, which are subject to the Repurchase Option, unless an
election is filed by the Participant with the Internal Revenue Service (and, if
necessary, the proper state taxing authorities), within 30 days of the purchase
of the Unvested Shares, electing pursuant to Section 83(b) of the Code (and
similar state tax provisions, if applicable) to be taxed currently on any
difference between the Exercise Price of the Unvested Shares and their Fair
Market Value on the date of purchase, there may be a recognition of taxable
income (including, where applicable, alternative minimum taxable income) to the
Participant, measured by the excess, if any, of the Fair Market Value of the
Unvested Shares at the time they cease to be Unvested Shares, over the Exercise
Price of the Unvested Shares.

         11. PRIVILEGES OF STOCK OWNERSHIP. Participant shall not have any of
the rights of a shareholder with respect to any Shares until the Shares are
issued to Participant.

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         12. INTERPRETATION. Any dispute regarding the interpretation of this
Agreement shall be submitted by Participant or the Company to the Committee for
review. The resolution of such a dispute by the Committee shall be final and
binding on the Company and Participant.

         13. ENTIRE AGREEMENT. The Plan is incorporated herein by reference.
This Agreement and the Plan constitute the entire agreement of the parties and
supersede all prior undertakings and agreements with respect to the subject
matter hereof.

         14. NOTICES. Any notice required to be given or delivered to the
Company under the terms of this Agreement shall be in writing and addressed to
the Corporate Secretary of the Company at its principal corporate offices. Any
notice required to be given or delivered to Participant shall be in writing and
addressed to Participant at the address indicated above or to such other address
as such party may designate in writing from time to time to the Company. All
notices shall be deemed to have been given or delivered upon: (i) personal
delivery; (ii) three (3) days after deposit in the United States mail by
certified or registered mail (return receipt requested); (iii) one (1) business
day after deposit with any return receipt express courier (prepaid); or (iv) one
(1) business day after transmission by facsimile, rapifax or telecopier.

         15. SUCCESSORS AND ASSIGNS. The Company may assign any of its rights
under this Agreement including its rights to purchase Shares under the
Repurchase Option and the Right of First Refusal. This Agreement shall be
binding upon and inure to the benefit of the successors and assigns of the
Company. Subject to the restrictions on transfer set forth herein, this
Agreement shall be binding upon Participant and Participant's heirs, executors,
administrators, legal representatives, successors and assigns.

         16. GOVERNING LAW. This Agreement shall be governed by and construed in
accordance with the laws of the State of California as such laws are applied to
agreements between California residents entered into and to be performed
entirely within California. If any provision of this Agreement is determined by
a court of law to be illegal or unenforceable, then such provision will be
enforced to the maximum extent possible and the other provisions will remain
fully effective and enforceable.

         17. ACCEPTANCE. Participant hereby acknowledges receipt of a copy of
the Plan and this Agreement. Participant has read and understands the terms and
provisions thereof, and accepts the Option subject to all the terms and
conditions of the Plan and this Agreement. Participant acknowledges that there
may be adverse tax consequences upon exercise of the Option or disposition of
the Shares and that Participant should consult a tax adviser prior to such
exercise or disposition.

              [THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

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         IN WITNESS WHEREOF, the Company has caused this Agreement to be
executed in triplicate by its duly authorized representative and Participant has
executed this Agreement in triplicate, effective as of the Date of Grant.

HANDSPRING, INC.
(FORMERLY JD TECHNOLOGY, INC.)        PARTICIPANT

By: /s/ Donna Dubinsky                /s/ Edward Colligan
   ------------------------------     -------------------------------------
                                      (Signature)

Donna Dubinsky                        Edward Colligan
---------------------------------     ------------------------------------
(Please print name)                   (Please print name)

President
---------------------------------
(Please print title)

           [SIGNATURE PAGE TO HANDSPRING, INC. STOCK OPTION AGREEMENT]

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                                    EXHIBIT A

                     FORM OF STOCK OPTION EXERCISE AGREEMENT

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                                HANDSPRING, INC.
                         (FORMERLY JD TECHNOLOGY, INC.)

                           1998 EQUITY INCENTIVE PLAN

                         STOCK OPTION EXERCISE AGREEMENT

         This Stock Option Exercise Agreement (the "EXERCISE AGREEMENT") is made
and entered into as of May 11, 1999 (the "EFFECTIVE DATE") by and between
Handspring, Inc. (formerly JD Technology, Inc.), a California corporation (the
"COMPANY"), and the purchaser named below (the "PURCHASER"). Capitalized terms
not defined herein shall have the meanings ascribed to them in the Company's
1998 Equity Incentive Plan (the "PLAN").

PURCHASER:                                    Edward Colligan
                                              ----------------------------------

                                              ----------------------------------

SOCIAL SECURITY NUMBER:
                                              ----------------------------------

ADDRESS:
                                              ----------------------------------

                                              ----------------------------------

TOTAL OPTION SHARES:                          200,000
                                              ----------------------------------

EXERCISE PRICE PER SHARE:                     $0.23
                                              ----------------------------------

DATE OF GRANT:                                October 12, 1998
                                              ----------------------------------

FIRST VESTING DATE:                           October 8, 1999
                                              ----------------------------------

EXPIRATION DATE:                              October 11, 2008
                                              ----------------------------------
                                              (Unless earlier terminated under
                                              Section 5.6 of the Plan)
TYPE OF STOCK OPTION
(CHECK ONE):                                  [X] INCENTIVE STOCK OPTION
                                              [ ] NONQUALIFIED STOCK OPTION

         1. EXERCISE OF OPTION.

                  1.1 Exercise. Pursuant to exercise of that certain option (the
"OPTION") granted to Purchaser under the Plan and subject to the terms and
conditions of this Exercise Agreement, Purchaser hereby purchases from the
Company, and the Company hereby sells to Purchaser, the Total Number of Shares
set forth above (the "SHARES") of the Company's Common Stock at the Exercise
Price Per Share set forth above (the "EXERCISE PRICE"). As used in this Exercise
Agreement, the term "SHARES" refers to the Shares purchased under this Exercise
Agreement and includes all securities received (i) in replacement of the Shares,
(ii) as a result of stock dividends or stock splits with respect to the Shares,
and (iii) all securities received in

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replacement of the Shares in a merger, recapitalization, reorganization or
similar corporate transaction.

                  1.2 Title to Shares. The exact spelling of the name(s) under
which Purchaser will take title to the Shares is:

                                         Edward T. Colligan
                           -----------------------------------------------------
                                         Lisa A. Colligan
                           -----------------------------------------------------

                  Purchaser desires to take title to the Shares as follows:

                           [  ] Individual, as separate property

                           [  ] Husband and wife, as community property

                           [X ] Joint Tenants

                           [  ] Other; please specify:

                  To assign the Shares to a trust, a stock transfer agreement in
the form attached hereto as Exhibit 5 (the "STOCK TRANSFER AGREEMENT") must be
completed and executed.

                  1.3 Payment. Purchaser hereby delivers payment of the Exercise
Price in the manner permitted in the Stock Option Agreement as follows (check
and complete as appropriate):

                          [X] in cash (by check) in the amount of $46,000.00,
                              receipt of which is acknowledged by the Company;

                          [ ] by cancellation of indebtedness of the Company
                              owed to Purchaser in the amount of $__________;

                          [ ] by delivery of _________ fully-paid,
                              nonassessable and vested shares of the Common
                              Stock of the Company owned by Purchaser for at
                              least six (6) months prior to the date hereof
                              which have been paid for within the meaning of
                              SEC Rule 144, (if purchased by use of a
                              promissory note, such note has been fully paid
                              with respect to such vested shares), or obtained
                              by Purchaser in the open public market, and owned
                              free and clear of all liens, claims, encumbrances
                              or security interests, valued at the current Fair
                              Market Value of $___________ per share;

                          [ ] by the waiver hereby of compensation due or
                              accrued for services rendered in the amount
                              of $_________.

         2. DELIVERY.

                  2.1 Deliveries by Purchaser. Purchaser hereby delivers to the
Company (i) this Exercise Agreement, (ii) two (2) copies of a blank Stock Power
and Assignment Separate from Stock Certificate in the form of Exhibit 1 attached
hereto (the "STOCK POWERS"), both executed by Purchaser (and Purchaser's spouse,
if any), (iii) if Purchaser is married, a Consent of Spouse in the form of
Exhibit 2 attached hereto (the "SPOUSE CONSENT") executed by Purchaser's

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spouse, (iv) the Exercise Price and payment or other provision for any
applicable tax obligations in the form of a check, a copy of which is attached
hereto as Exhibit 3 and (v) if shares are being transferred to a trust, the
fully executed Stock Transfer Agreement in the form attached hereto as Exhibit
5.

                  2.2 Deliveries by the Company. Upon its receipt of the
Exercise Price, payment or other provision for any applicable tax obligations
and all the documents to be executed and delivered by Purchaser to the Company
under Section 2.1, the Company will issue a duly executed stock certificate
evidencing the Shares in the name of Purchaser to be placed in escrow as
provided in Section 11 to secure payment of Purchaser's obligation to the
Company under the promissory note and until expiration or termination of the
Company's Repurchase Option and Right of First Refusal described in Sections 8,
9 and 10.

         3. REPRESENTATIONS AND WARRANTIES OF PURCHASER. Purchaser represents
and warrants to the Company that:

                  3.1 Agrees to Terms of the Plan. Purchaser has received a copy
of the Plan and the Stock Option Agreement, has read and understands the terms
of the Plan, the Stock Option Agreement and this Exercise Agreement, and agrees
to be bound by their terms and conditions. Purchaser acknowledges that there may
be adverse tax consequences upon exercise of the Option or disposition of the
Shares, and that Purchaser should consult a tax adviser prior to such exercise
or disposition.

                  3.2 Purchase for Own Account for Investment. Purchaser is
purchasing the Shares for Purchaser's own account for investment purposes only
and not with a view to, or for sale in connection with, a distribution of the
Shares within the meaning of the Securities Act. Purchaser has no present
intention of selling or otherwise disposing of all or any portion of the Shares
and no one other than Purchaser has any beneficial ownership of any of the
Shares.

                  3.3 Access to Information. Purchaser has had access to all
information regarding the Company and its present and prospective business,
assets, liabilities and financial condition that Purchaser reasonably considers
important in making the decision to purchase the Shares, and Purchaser has had
ample opportunity to ask questions of the Company's representatives concerning
such matters and this investment.

                  3.4 Understanding of Risks. Purchaser is fully aware of: (i)
the highly speculative nature of the investment in the Shares; (ii) the
financial hazards involved; (iii) the lack of liquidity of the Shares and the
restrictions on transferability of the Shares (e.g., that Purchaser may not be
able to sell or dispose of the Shares or use them as collateral for loans); (iv)
the qualifications and backgrounds of the management of the Company; and (v) the
tax consequences of investment in the Shares. Purchaser is capable of evaluating
the merits and risks of this investment, has the ability to protect Purchaser's
own interests in this transaction and is financially capable of bearing a total
loss of this investment.

                  3.5 No General Solicitation. At no time was Purchaser
presented with or solicited by any publicly issued or circulated newspaper,
mail, radio, television or other form of general advertising or solicitation in
connection with the offer, sale and purchase of the Shares.

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         4. COMPLIANCE WITH SECURITIES LAWS.

                  4.1 Compliance with U.S. Federal Securities Laws. Purchaser
understands and acknowledges that the Shares have not been registered with the
SEC under the Securities Act and that, notwithstanding any other provision of
the Stock Option Agreement to the contrary, the exercise of any rights to
purchase any Shares is expressly conditioned upon compliance with the Securities
Act and all applicable state securities laws. Purchaser agrees to cooperate with
the Company to ensure compliance with such laws. The Shares are being issued
under the Securities Act pursuant to the exemption provided by SEC Rule 701.

                  4.2 Compliance with California Securities Laws. The Plan, The
stock option agreement, and this Exercise Agreement are intended to comply with
Section 25102(o) of the California Corporations Code and any rules (INCLUDING
COMMISSIONER RULES, IF APPLICABLE) or regulations promulgated thereunder BY THE
CALIFORNIA DEPARTMENT OF CORPORATIONS (the "REGULATIONS"). Any provision of this
Exercise Agreement which is inconsistent with Section 25102(o) shall, without
further act or amendment by the Company or the Board, be reformed to comply with
the requirements of Section 25102(o). THE SALE OF THE SECURITIES THAT ARE THE
SUBJECT OF THIS EXERCISE AGREEMENT, IF NOT YET QUALIFIED WITH THE CALIFORNIA
COMMISSIONER OF CORPORATIONS AND NOT EXEMPT FROM SUCH QUALIFICATION, IS SUBJECT
TO SUCH QUALIFICATION, AND THE ISSUANCE OF SUCH SECURITIES, AND THE RECEIPT OF
ANY PART OF THE CONSIDERATION THEREFOR PRIOR TO SUCH QUALIFICATION IS UNLAWFUL
UNLESS THE SALE IS EXEMPT. THE RIGHTS OF THE PARTIES TO THIS EXERCISE AGREEMENT
ARE EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION BEING OBTAINED OR AN EXEMPTION
BEING AVAILABLE.

         5. RESTRICTED SECURITIES.

                  5.1 No Transfer Unless Registered or Exempt. Purchaser
understands that Purchaser may not transfer any Shares unless such Shares are
registered under the Securities Act or qualified under applicable state
securities laws or unless, in the opinion of counsel to the Company, exemptions
from such registration and qualification requirements are available. Purchaser
understands that only the Company may file a registration statement with the SEC
and that the Company is under no obligation to do so with respect to the Shares.
Purchaser has also been advised that exemptions from registration and
qualification may not be available or may not permit Purchaser to transfer all
or any of the Shares in the amounts or at the times proposed by Purchaser.

                  5.2 SEC Rule 144. In addition, Purchaser has been advised that
SEC Rule 144 promulgated under the Securities Act, which permits certain limited
sales of unregistered securities, is not presently available with respect to the
Shares and, in any event, requires that the Shares be held for a minimum of one
(1) year, and in certain cases two (2) years, after they have been purchased and
paid for (within the meaning of Rule 144). Purchaser understands that Rule 144
may indefinitely restrict transfer of the Shares so long as Purchaser remains an
"affiliate" of the Company or if "current public information" about the Company
(as defined in Rule 144) is not publicly available.

                                       4
<PAGE>   14

                  5.3 SEC Rule 701. The Shares are issued pursuant to SEC Rule
701 promulgated under the Securities Act and may become freely tradeable by
non-affiliates (under limited conditions regarding the method of sale) ninety
(90) days after the first sale of Common Stock of the Company to the general
public pursuant to a registration statement filed with and declared effective by
the SEC, subject to the lengthier market standoff agreement contained in Section
7 of this Exercise Agreement or any other agreement entered into by Purchaser.
Affiliates must comply with the provisions (other than the holding period
requirements) of Rule 144.

         6.       RESTRICTIONS ON TRANSFERS.

                  6.1 Disposition of Shares. Purchaser hereby agrees that
Purchaser shall make no disposition of the Shares (other than as permitted by
this Exercise Agreement) unless and until:

                           (a) Purchaser shall have notified the Company of the
proposed disposition and provided a written summary of the terms and conditions
of the proposed disposition;

                           (b) Purchaser shall have complied with all
requirements of this Exercise Agreement applicable to the disposition of the
Shares;

                           (c) Purchaser shall have provided the Company with
written assurances, in form and substance satisfactory to counsel for the
Company, that (i) the proposed disposition does not require registration of the
Shares under the Securities Act or (ii) all appropriate actions necessary for
compliance with the registration requirements of the Securities Act or of any
exemption from registration available under the Securities Act (including Rule
144) have been taken; and

                           (d) Purchaser shall have provided the Company with
written assurances, in form and substance satisfactory to the Company, that the
proposed disposition will not result in the contravention of any transfer
restrictions applicable to the Shares pursuant to the provisions of the
Regulations referred to in Section 4.2 hereof.

                  6.2 Restriction on Transfer. Purchaser shall not transfer,
assign, grant a lien or security interest in, pledge, hypothecate, encumber or
otherwise dispose of any of the Shares which are subject to the Company's
Repurchase Option or the Company's Right of First Refusal described below,
except as permitted by this Exercise Agreement.

                  6.3 Transferee Obligations. Each person (other than the
Company) to whom the Shares are transferred by means of one of the permitted
transfers specified in this Exercise Agreement must, as a condition precedent to
the validity of such transfer, acknowledge in writing to the Company that such
person is bound by the provisions of this Exercise Agreement and that the
transferred Shares are subject to: (i) both the Company's Repurchase Option and
the Company's Right of First Refusal granted hereunder and (ii) the market
stand-off provisions of Section 7 hereof, to the same extent such Shares would
be so subject if retained by the Purchaser.

         7. MARKET STANDOFF AGREEMENT. Purchaser agrees in connection with any
registration of the Company's securities that, upon the request of the Company

                                       5
<PAGE>   15

or the underwriters managing any public offering of the Company's securities,
Purchaser will not sell or otherwise dispose of any Shares without the prior
written consent of the Company or such underwriters, as the case may be, for
such period of time (not to exceed one hundred eighty (180) days) after the
effective date of such registration requested by such managing underwriters and
subject to all restrictions as the Company or the underwriters may specify.
Purchaser further agrees to enter into any agreement reasonably required by the
underwriters to implement the foregoing.

         8. COMPANY'S REPURCHASE OPTION FOR UNVESTED SHARES. The Company, or its
assignee, shall have the option to repurchase Purchaser's Unvested Shares (as
defined in Section 2.2 of the Stock Option Agreement) on the terms and
conditions set forth in this Section 8 (the "REPURCHASE OPTION") if Purchaser is
Terminated (as defined in the Plan) for any reason, or no reason, including
without limitation Purchaser's death, Disability (as defined in the Plan),
voluntary resignation or termination by the Company with or without Cause.
Notwithstanding the foregoing, the Company shall retain the Repurchase Option
for Unvested Shares only as to that number of Unvested Shares (whether or not
exercised) that exceeds the number of shares which remain unexercised.

                  8.1 Termination and Termination Date. In case of any dispute
as to whether Purchaser is Terminated, the Committee shall have discretion to
determine whether Purchaser has been Terminated and the effective date of such
Termination (the "TERMINATION DATE").

                  8.2 Exercise of Repurchase Option. At any time within ninety
(90) days after the Purchaser's Termination Date (or, in the case of securities
issued upon exercise of an Option after the Purchaser's Termination Date, within
ninety (90) days after the date of such exercise), the Company, or its assignee,
may elect to repurchase the Purchaser's Unvested Shares by giving Purchaser
written notice of exercise of the Repurchase Option.

                  8.3 Calculation of Repurchase Price for Unvested Shares. The
Company or its assignee shall have the option to repurchase from Purchaser (or
from Purchaser's personal representative as the case may be) the Unvested Shares
at the Purchaser's Exercise Price, proportionately adjusted for any stock split
or similar change in the capital structure of the Company as set forth in
Section 2.2 of the Plan (the "REPURCHASE PRICE").

                  8.4 Payment of Repurchase Price. The Repurchase Price shall be
payable, at the option of the Company or its assignee, by check or by
cancellation of all or a portion of any outstanding indebtedness owed by
Purchaser to the Company or such assignee, or by any combination thereof. The
Repurchase Price shall be paid without interest within sixty (60) days after
exercise of the Repurchase Option.

                  8.5 Right of Termination Unaffected. Nothing in this Exercise
Agreement shall be construed to limit or otherwise affect in any manner
whatsoever the right or power of the Company (or any Parent or Subsidiary of the
Company) to terminate Purchaser's employment or other relationship with Company
(or the Parent or Subsidiary of the Company) at any time, for any reason or no
reason, with or without Cause.

         9. COMPANY'S RIGHT OF FIRST REFUSAL. Unvested Shares may not be sold or
otherwise transferred by Purchaser without the Company's prior written consent.
Before any Vested Shares held by Purchaser or any transferee of such Vested
Shares (either being sometimes

                                       6
<PAGE>   16

referred to herein as the "HOLDER") may be sold or otherwise transferred by gift
(including without limitation any transfer by (i) an assignment of any Shares
for the benefit of creditors of the Holder, (ii) a transfer by operation of law,
(iii) an execution of judgment against the Shares or the acquisition of record
or beneficial ownership of Shares by a lender or creditor, (iv) a transfer by
will or under the laws of descent and distribution, (v) a transfer pursuant to
any decree of divorce, dissolution or separate maintenance, any property
settlement, any separation agreement or any other agreement with a spouse
(except for bona fide estate planning purposes) under which any Shares are
transferred or awarded to the spouse of the Holder or are required to be sold,
or (vi) a transfer resulting from the filing by the Holder of a petition for
relief or the filing of an involuntary petition against Holder, under the
bankruptcy laws of the United States or of any other nation (each instance
referred to hereafter as the "INVOLUNTARY TRANSFER")), the Company and/or its
assignee(s) shall have an assignable right of first refusal to purchase the
Vested Shares to be sold or transferred (THE "OFFERED SHARES") on the terms and
conditions set forth in this Section (the "RIGHT OF FIRST REFUSAL").

                  9.1 Notice of Proposed Transfer. In the event the Holder
proposes to transfer any Vested Shares, other than by an Involuntary Transfer,
the Holder of the Offered Shares shall deliver to the Company a written notice
(the "VOLUNTARY TRANSFER NOTICE") stating: (i) the Holder's bona fide intention
to sell or otherwise transfer the Offered Shares; (ii) the name of each proposed
bona fide purchaser or other transferee (the "PROPOSED TRANSFEREE"); (iii) the
number of Offered Shares to be transferred to each Proposed Transferee; (iv) the
bona fide cash price or other consideration for which the Holder proposes to
transfer the Offered Shares (the "OFFERED PRICE"); and (v) that the Holder
acknowledges this Notice is an offer to sell the Offered Shares to the Company
and/or its assignee(s) pursuant to the Company's Right of First Refusal at the
Offered Price as provided for in this Exercise Agreement. In the event of any
Involuntary Transfer of any Vested Shares, the Holder shall deliver to the
Company a written notice (the "INVOLUNTARY TRANSFER NOTICE") stating: (i) the
number of Shares subject to the Involuntary Transfer, (ii) the manner,
circumstances and date of the Involuntary Transfer, and (iii) the name and
address of the Holder and transferee. If the Company subsequently requests
additional information concerning the Involuntary Transfer or transferee, Holder
agrees to promptly provide the requested information to the Company.

                  9.2 Exercise of Right of First Refusal. At any time within
thirty (30) days after the date of the Voluntary Transfer Notice or the
Involuntary Transfer Notice (either being sometimes referred to herein as the
"NOTICE"), the Company and/or its assignee(s) may, by giving written notice to
the Holder, elect to purchase all (or, with the consent of the Holder, less than
all) the Offered Shares proposed to be transferred to any one or more of the
Proposed Transferees named in the Notice, at the purchase price, determined as
specified below.

                  9.3 Purchase Price. The purchase price for the Offered Shares
purchased under this Section will be the Offered Price. If no price or other
legal consideration is to be paid for the Shares, the transfer will be referred
to as a "DONATIVE TRANSFER". If the Offered Price includes consideration other
than cash, then the cash equivalent value of the non-cash consideration shall
conclusively be deemed to be the present Fair Market Value of such non-cash
consideration as conclusively determined in good faith by the Board of Directors
of the Company. In the case of a Donative Transfer or an Involuntary Transfer,
the Offered Price to be paid to the Holder by the Company or its assignee will
be the Fair Market Value on the proposed

                                       7
<PAGE>   17
transfer date, as conclusively determined in good faith by the Board of
Directors of the Company.

                  9.4 Payment. Payment of the Offered Price will be payable, at
the option of the Company and/or its assignee(s) (as applicable), by check or by
cancellation of all or a portion of any outstanding indebtedness owed by the
Holder to the Company (or to such assignee, in the case of a purchase of Offered
Shares by such assignee) or by any combination thereof. The Offered Price will
be paid without interest within sixty (60) days after the Company's receipt of
the Notice, or, at the option of the Company and/or its assignee(s), in the
manner and at the time(s) set forth in the Notice.

                  9.5 Holder's Right to Transfer. If all of the Offered Shares
proposed in the Notice to be transferred to a given Proposed Transferee are not
purchased by the Company and/or its assignee(s) as provided in this Section,
then the Holder may sell or otherwise transfer such Offered Shares to that
Proposed Transferee at the Offered Price or at a higher price, provided (i) that
such sale or other transfer is consummated within one hundred twenty (120) days
after the date of the Notice, (ii) any such sale or other transfer is effected
in compliance with all applicable securities laws, and (iii) the Proposed
Transferee agrees in writing that the provisions of this Section will continue
to apply to the Offered Shares in the hands of such Proposed Transferee. If the
Offered Shares described in the Notice are not transferred to the Proposed
Transferee within such one hundred twenty (120) day period, then a new Notice
must be given to the Company pursuant to which the Company will again be offered
the Right of First Refusal before any Shares held by the Holder may be sold or
otherwise transferred.

                  9.6 Exempt Transfers. Notwithstanding anything to the contrary
in this Section, the following transfers of Vested Shares will be exempt from
the Right of First Refusal: (i) the transfer of any or all of the Vested Shares
during Purchaser's lifetime by gift or on Purchaser's death by will or intestacy
to Purchaser's "Immediate Family" (as defined below) or to a trust for the
benefit of Purchaser or Purchaser's Immediate Family, provided that each
transferee or other recipient agrees in a writing satisfactory to the Company
that the provisions of this Section will continue to apply to the transferred
Vested Shares in the hands of such transferee or other recipient; (ii) any
transfer of Vested Shares made pursuant to a statutory merger or statutory
consolidation of the Company with or into another corporation or corporations
(except that the Right of First Refusal and Repurchase Option will continue to
apply thereafter to such Vested Shares, in which case the surviving corporation
of such merger or consolidation shall succeed to the rights of the Company under
this Section unless the agreement of merger or consolidation expressly otherwise
provides); or (iii) any transfer of Vested Shares pursuant to the winding up and
dissolution of the Company. As used herein, the term "IMMEDIATE FAMILY" will
mean Purchaser's spouse, the lineal descendant or antecedent, father, mother,
brother or sister, child, adopted child, grandchild or adopted grandchild of the
Purchaser or the Purchaser's spouse, or the spouse of any child, adopted child,
grandchild or adopted grandchild of Purchaser or the Purchaser's spouse. or
Spousal Equivalent, as defined herein. As used herein, a person is deemed to be
a "Spousal Equivalent" provided the following circumstances are true: (i)
irrespective of whether or not the Participant and the Spousal Equivalent are
the same sex, they are the sole spousal equivalent of the other for the last
twelve (12) months, (ii) they intend to remain so indefinitely, (iii) neither
are married to anyone else, (iv) both are at least 18 years of age and mentally
competent to consent to contract, (v) they are not related by blood to a degree
of closeness that which would prohibit legal marriage in the state

                                       8
<PAGE>   18

in which they legally reside, (vi) they are jointly responsible for each other's
common welfare and financial obligations, and (vii) they reside together in the
same residence for the last twelve (12) months and intend to do so indefinitely.

                           9.7 Termination of Right of First Refusal. The
Company's Right of First Refusal will terminate when the Company's securities
become publicly traded.

       10. RIGHTS AS A SHAREHOLDER. Subject to the terms and conditions of this
Exercise Agreement, Purchaser will have all of the rights of a shareholder of
the Company with respect to the Shares from and after the date that Shares are
issued to Purchaser until such time as Purchaser disposes of the Shares or the
Company and/or its assignee(s) exercise(s) the Repurchase Option or Right of
First Refusal. Upon an exercise of the Repurchase Option or the Right of First
Refusal, Purchaser will have no further rights as a holder of the Shares so
purchased upon such exercise, other than the right to receive payment for the
Shares so purchased in accordance with the provisions of this Exercise
Agreement, and Purchaser will promptly surrender the stock certificate(s)
evidencing the Shares so purchased to the Company for transfer or cancellation.

       11. ESCROW. As security for Purchaser's faithful performance of this
Exercise Agreement, Purchaser agrees, immediately upon receipt of the stock
certificate(s) evidencing the Shares, to deliver such certificate(s), together
with the Stock Powers executed by Purchaser and by Purchaser's spouse, if any
(with the date and number of Shares left blank), to the Secretary of the Company
or other designee of the Company (the "ESCROW HOLDER"), who is hereby appointed
to hold such certificate(s) and Stock Powers in escrow and to take all such
actions and to effectuate all such transfers and/or releases of such Shares as
are in accordance with the terms of this Exercise Agreement. Purchaser and the
Company agree that Escrow Holder will not be liable to any party to this
Exercise Agreement (or to any other party) for any actions or omissions unless
Escrow Holder is grossly negligent or intentionally fraudulent in carrying out
the duties of Escrow Holder under this Exercise Agreement. Escrow Holder may
rely upon any letter, notice or other document executed with any signature
purported to be genuine and may rely on the advice of counsel and obey any order
of any court with respect to the transactions contemplated by this Exercise
Agreement. The Shares will be released from escrow upon termination of both the
Repurchase Option and the Right of First Refusal.

         12. RESTRICTIVE LEGENDS AND STOP-TRANSFER ORDERS.

                  12.1 Legends. Purchaser understands and agrees that the
Company will place the legends set forth below or similar legends on any stock
certificate(s) evidencing the Shares, together with any other legends that may
be required by state or U.S. Federal securities laws, the Company's Articles of
Incorporation or Bylaws, any other agreement between Purchaser and the Company
or any agreement between Purchaser and any third party:

                           THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN
                           REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
                           AMENDED (THE "SECURITIES ACT"), OR UNDER THE
                           SECURITIES LAWS OF CERTAIN STATES. THESE SECURITIES
                           ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY AND
                           RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS
                           PERMITTED UNDER THE SECURITIES ACT AND APPLICABLE
                           STATE SECURITIES LAWS, PURSUANT TO REGISTRATION OR
                           EXEMPTION THEREFROM. INVESTORS

                                       9
<PAGE>   19

                           SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR THE
                           FINANCIAL RISKS OF THIS INVESTMENT FOR AN INDEFINITE
                           PERIOD OF TIME. THE ISSUER OF THESE SECURITIES MAY
                           REQUIRE AN OPINION OF COUNSEL IN FORM AND SUBSTANCE
                           SATISFACTORY TO THE ISSUER TO THE EFFECT THAT ANY
                           PROPOSED TRANSFER OR RESALE IS IN COMPLIANCE WITH THE
                           SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES
                           LAWS.

                           THE SHARES REPRESENTED BY THIS CERTIFICATE ARE
                           SUBJECT TO CERTAIN RESTRICTIONS ON PUBLIC RESALE AND
                           TRANSFER, INCLUDING THE RIGHT OF REPURCHASE AND RIGHT
                           OF FIRST REFUSAL OPTIONS HELD BY THE ISSUER AND/OR
                           ITS ASSIGNEE(S) AS SET FORTH IN A STOCK OPTION
                           EXERCISE AGREEMENT BETWEEN THE ISSUER AND THE
                           ORIGINAL HOLDER OF THESE SHARES, A COPY OF WHICH MAY
                           BE OBTAINED AT THE PRINCIPAL OFFICE OF THE ISSUER.
                           SUCH PUBLIC SALE AND TRANSFER RESTRICTIONS INCLUDING
                           THE RIGHT OF REPURCHASE AND RIGHT OF FIRST REFUSAL
                           ARE BINDING ON TRANSFEREES OF THESE SHARES.

                  12.2 Stop-Transfer Instructions. Purchaser agrees that, to
ensure compliance with the restrictions imposed by this Exercise Agreement, the
Company may issue appropriate "stop-transfer" instructions to its transfer
agent, if any, and if the Company transfers its own securities, it may make
appropriate notations to the same effect in its own records.

                  12.3 Refusal to Transfer. The Company will not be required (i)
to transfer on its books any Shares that have been sold or otherwise transferred
in violation of any of the provisions of this Exercise Agreement or (ii) to
treat as owner of such Shares, or to accord the right to vote or pay dividends
to any purchaser or other transferee to whom such Shares have been so
transferred.

       13. TAX CONSEQUENCES. PURCHASER UNDERSTANDS THAT PURCHASER MAY SUFFER
ADVERSE TAX CONSEQUENCES AS A RESULT OF PURCHASER'S PURCHASE OR DISPOSITION OF
THE SHARES. PURCHASER REPRESENTS: (i) THAT PURCHASER HAS CONSULTED WITH ANY TAX
ADVISER THAT PURCHASER DEEMS ADVISABLE IN CONNECTION WITH THE PURCHASE OR
DISPOSITION OF THE SHARES AND (ii) THAT PURCHASER IS NOT RELYING ON THE COMPANY
FOR ANY TAX ADVICE. IN PARTICULAR, IF UNVESTED SHARES ARE SUBJECT TO REPURCHASE
BY THE COMPANY, PURCHASER REPRESENTS THAT PURCHASER HAS CONSULTED WITH
PURCHASER'S OWN TAX ADVISER CONCERNING THE ADVISABILITY OF FILING AN 83(b)
ELECTION WITH THE INTERNAL REVENUE SERVICE WHICH MUST BE FILED WITHIN THIRTY
(30) DAYS OF THE PURCHASE OF SHARES TO BE EFFECTIVE. SET FORTH BELOW IS A BRIEF
SUMMARY AS OF THE DATE THE PLAN WAS ADOPTED BY THE BOARD OF SOME OF THE U.S.
FEDERAL AND CALIFORNIA TAX CONSEQUENCES OF EXERCISE OF THE OPTION AND
DISPOSITION OF THE SHARES. THIS SUMMARY IS NECESSARILY INCOMPLETE, AND THE TAX
LAWS AND REGULATIONS ARE SUBJECT TO CHANGE. PURCHASER

                                       10
<PAGE>   20

SHOULD CONSULT HIS OR HER OWN TAX ADVISER BEFORE EXERCISING THIS OPTION OR
DISPOSING OF THE SHARES.

                  13.1 Exercise of Incentive Stock Option. If the Option
qualifies as an ISO, there will be no regular U.S. Federal income tax liability
or California income tax liability upon
the exercise of the Option, although the excess, if any, of the Fair Market
Value of the Shares on the date of exercise over the Exercise Price will be
treated as a tax preference item for U.S. Federal alternative minimum tax
purposes and may subject Purchaser to the alternative minimum tax in the year of
exercise.

                  13.2 Exercise of Nonqualified Stock Option. If the Option does
not qualify as an ISO, there may be a regular U.S. Federal income tax liability
and a California income tax liability upon the exercise of the Option. Purchaser
will be treated as having received compensation income (taxable at ordinary
income tax rates) equal to the excess, if any, of the Fair Market Value of the
Shares on the date of exercise over the Exercise Price. If Purchaser is or was
an employee of the Company, the Company may be required to withhold from
Purchaser's compensation or collect from Purchaser and pay to the applicable
taxing authorities an amount equal to a percentage of this compensation income
at the time of exercise.

                  13.3 Disposition of Shares. The following tax consequences may
apply upon disposition of the Shares.

                           (a) Incentive Stock Options. If the Shares are held
for more than twelve (12) months after the date of the transfer of the Shares
pursuant to the exercise of an ISO and are disposed of more than two (2) years
after the Date of Grant, any gain realized on disposition of the Shares will be
treated as long term capital gain for federal and California income tax
purposes. If Shares purchased under an ISO are disposed of within the applicable
one (1) year or two (2) year period, any gain realized on such disposition will
be treated as compensation income (taxable at ordinary income rates) to the
extent of the excess, if any, of the Fair Market Value of the Shares on the date
of exercise over the Exercise Price.

                           (b) Nonqualified Stock Options. If the Shares are
held for more than twelve (12) months after the date of the transfer of the
Shares pursuant to the exercise of an NQSO, any gain realized on disposition of
the Shares will be treated as long term capital gain.

                           (c) Withholding. The Company may be required to
withhold from the Purchaser's compensation or collect from the Purchaser and pay
to the applicable taxing authorities an amount equal to a percentage of this
compensation income.

                  13.4 Section 83(b) Election for Unvested Shares. With respect
to Unvested Shares, which are subject to the Repurchase Option, unless an
election is filed by the Purchaser with the Internal Revenue Service (and, if
necessary, the proper state taxing authorities), WITHIN 30 DAYS OF THE PURCHASE
of the Unvested Shares, electing pursuant to Section 83(b) of the Code (and
similar state tax provisions, if applicable) to be taxed currently on any
difference between the Exercise Price of the Unvested Shares and their Fair
Market Value on the date of purchase, there may be a recognition of taxable
income (including, where applicable, alternative minimum taxable income) to the
Purchaser, measured by the excess, if any, of the Fair Market Value of the
Unvested Shares at the time they cease to be Unvested Shares, over the Exercise
Price of the

                                       11
<PAGE>   21

any stock exchange or automated quotation system on which the Company's Common
Stock may be listed or quoted at the time of such issuance or transfer.

       15. SUCCESSORS AND ASSIGNS. The Company may assign any of its rights
under this Exercise Agreement, including its rights to purchase Shares under the
Repurchase Option and the Right of First Refusal. This Exercise Agreement shall
be binding upon and inure to the benefit of the successors and assigns of the
Company. Subject to the restrictions on transfer herein set forth, this Exercise
Agreement will be binding upon Purchaser and Purchaser's heirs, executors,
administrators, legal representatives, successors and assigns.

       16. GOVERNING LAW; SEVERABILITY. This Exercise Agreement shall be
governed by and construed in accordance with the internal laws of the State of
California as such laws are applied to agreements between California residents
entered into and to be performed entirely within California. If any provision of
this Exercise Agreement is determined by a court of law to be illegal or
unenforceable, then such provision will be enforced to the maximum extent
possible and the other provisions will remain fully effective and enforceable.

       17. NOTICES. Any notice required to be given or delivered to the Company
shall be in writing and addressed to the Corporate Secretary of the Company at
its principal corporate offices. Any notice required to be given or delivered to
Purchaser shall be in writing and addressed to Purchaser at the address
indicated above or to such other address as Purchaser may designate in writing
from time to time to the Company. All notices shall be deemed effectively given
upon personal delivery, (i) three (3) days after deposit in the United States
mail by certified or registered mail (return receipt requested), (ii) one (1)
business day after its deposit with any return receipt express courier
(prepaid), or (iii) one (1) business day after transmission by rapifax or
telecopier.

       18. FURTHER INSTRUMENTS. The parties agree to execute such further
instruments and to take such further action as may be reasonably necessary to
carry out the purposes and intent of this Exercise Agreement.

         19. HEADINGS. The captions and headings of this Exercise Agreement are
included for ease of reference only and will be disregarded in interpreting or
construing this Exercise Agreement. All references herein to Sections will refer
to Sections of this Exercise Agreement.

       20. ENTIRE AGREEMENT. The Plan, the Stock Option Agreement and this
Exercise Agreement, together with all Exhibits thereto, constitute the entire
agreement and understanding of the parties with respect to the subject matter of
this Exercise Agreement, and supersede all prior understandings and agreements,
whether oral or written, between the parties hereto with respect to the specific
subject matter hereof.

                                       12
<PAGE>   22
Unvested Shares. A form of Election under Section 83(b) is attached
hereto as Exhibit 4 for reference.

       14. COMPLIANCE WITH LAWS AND REGULATIONS. The issuance and transfer of
the Shares will be subject to and conditioned upon compliance by the Company and
Purchaser with all applicable state and U.S. Federal laws and regulations and
with all applicable requirements of

       IN WITNESS WHEREOF, the Company has caused this Exercise Agreement to be
executed in triplicate by its duly authorized representative and Purchaser has
executed this Exercise Agreement in triplicate as of the Effective Date,
indicated above.

HANDSPRING, INC.                             PURCHASER

(FORMERLY JD TECHNOLOGY, INC.)

By:     /s/ DONNA DUBINSKY                   /s/ EDWARD T. COLLIGAN
   ------------------------------            ---------------------------------
                                             (Signature)

Donna Dubinsky                                Edward T. Colligan
---------------------------------             --------------------------------
(Please print name)                           (Please print name)

President
---------------------------------
(Please print title)

      [SIGNATURE PAGE TO HANDSPRING, INC. STOCK OPTION EXERCISE AGREEMENT]

                                       13
<PAGE>   23

                                LIST OF EXHIBITS

Exhibit 1:        Stock Power and Assignment Separate from Stock Certificate

Exhibit 2:        Spouse Consent

Exhibit 3:        Copy of Purchaser's Check

Exhibit 4:        Section 83(b) Election

Exhibit 5:        Stock Transfer Agreement

<PAGE>   24

                                    EXHIBIT 1

                           STOCK POWER AND ASSIGNMENT
                         SEPARATE FROM STOCK CERTIFICATE

<PAGE>   25

                           STOCK POWER AND ASSIGNMENT
                         SEPARATE FROM STOCK CERTIFICATE

         FOR VALUE RECEIVED and pursuant to that certain Stock Option Exercise
Agreement No. ________ dated as of _______________, _____, (the "AGREEMENT"),
the undersigned hereby sells, assigns and transfers unto
_______________________________, __________ shares of the Common Stock of
Handspring, Inc. (formerly JD Technology, Inc.), a California corporation (the
"COMPANY"), standing in the undersigned's name on the books of the Company
represented by Certificate No(s). ______ delivered herewith, and does hereby
irrevocably constitute and appoint the Secretary of the Company as the
undersigned's attorney-in-fact, with full power of substitution, to transfer
said stock on the books of the Company. THIS ASSIGNMENT MAY ONLY BE USED AS
AUTHORIZED BY THE AGREEMENT AND ANY EXHIBITS THERETO.

Dated:              ,
      -------------   ---------

                                        PURCHASER

                                        /s/ EDWARD T. COLLIGAN
                                        ------------------------------------
                                        (Signature)

                                              Edward T. Colligan
                                        ------------------------------------
                                        (Please Print Name)

                                        /s/ LISA A. COLLIGAN
                                        ------------------------------------
                                        (Spouse's Signature, if any)

                                              Lisa A. Colligan
                                        ------------------------------------
                                        (Please Print Spouse's Name)

INSTRUCTIONS TO PURCHASER: Please do not fill in any blanks other than the
signature line. The purpose of this Stock Power and Assignment is to enable the
Company to acquire the shares pursuant to its "Repurchase Option" and/or "Right
of First Refusal" set forth in the Exercise Agreement without requiring
additional signatures on the part of the Purchaser or Purchaser's Spouse.

<PAGE>   26

                                    EXHIBIT 2

                                 SPOUSE CONSENT

<PAGE>   27

                                 SPOUSE CONSENT

         The undersigned spouse of Edward T. Colligan (the "PURCHASER") has
read, understands, and hereby approves the Stock Option Exercise Agreement
between Purchaser and the Company (the "AGREEMENT"). In consideration of the
Company's granting my spouse the right to purchase the Shares as set forth in
the Agreement, the undersigned hereby agrees to be irrevocably bound by the
Agreement and further agrees that any community property interest I may have in
the Shares shall similarly be bound by the Agreement. The undersigned hereby
appoints Purchaser as my attorney-in-fact with respect to any amendment or
exercise of any rights under the Agreement.

Date:  May 11, 1999
     -------------------------------------

                                                Lisa A. Colligan
                                           -----------------------------------
                                           Print Name of Purchaser's Spouse

                                                /s/ LISA A. COLLIGAN
                                           -----------------------------------
                                           Signature of Purchaser's Spouse

                            Address:
                                           -----------------------------------

                                           -----------------------------------

                                           -----------------------------------

                        [ ]  Please check this box if you do not have a spouse.

<PAGE>   28

                                    EXHIBIT 3

                            COPY OF PURCHASER'S CHECK

        [Check in the Amount of $46,000.00 Payable to Handspring, Inc.]<PAGE>   1
                                                                     EXHIBIT 4.2

                                   WEBEX, INC.

                AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

        THIS AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT (this "Agreement")
is made and entered into as of the 30th day of March, 2000, by and among WEBEX,
INC., a California corporation (the "Company"), SUBRAH IYAR, MIN ZHU and YUQING
XU (collectively, the "Founders") and the undersigned parties identified on
Schedule A attached hereto (the "Investors").

                              W I T N E S S E T H:

        WHEREAS, certain of the Investors hold shares of the Company's Series A,
Series B, and Series C Preferred Stock and possess registration rights,
information rights and other rights pursuant to an Investors' Rights Agreement
among the Company and such Investors dated as of December 17, 1999 (the "1999
Rights Agreement"); and

        WHEREAS, the undersigned Investors who hold Series A, Series B and
Series C Preferred Stock desire to terminate the 1999 Rights Agreement and to
accept the rights created pursuant hereto in lieu of the rights granted to them
under this Rights Agreement; and

        WHEREAS, the obligations of certain Investors to purchase Series D
Preferred Stock are conditioned upon the execution and delivery of this
Agreement by such Investors, and holders of in excess of 75% of the Series A,
Series B and Series C Preferred Stock and the Company:

        NOW, THEREFORE, in consideration of the mutual promises and covenants
set forth herein, the Investors who are parties to the 1999 Rights Agreement
hereby agree that the 1999 Rights Agreement shall be superseded and replaced in
its entirety by this Agreement, and the parties hereto further agree as follows:

                                    SECTION 1

       Restrictions on Transferability of Securities; Registration Rights

        1.1 Certain Definitions. As used in this Agreement, the following terms
shall have the meanings set forth below:

        (a) "Affiliate" shall mean a person that directly, or indirectly through
one or more intermediaries, controls, or is controlled by, or is under common
control with, a Holder . The term "person" for the purpose of this definition
includes, in addition to such Holder, the following persons: (i) any relative or
spouse of such Holder; (ii) any trust or estate in which such Holder or any of
the persons specified in subsection (i) collectively own fifty percent or more
of the total beneficial interest or of which any of such persons serve as
trustee, executor or in any similar capacity; and (iii) any corporation or other
organization (other than the Holder) in which such Holder or any of the persons
specified in of this section are the beneficial owners collectively of fifty
percent or more of the voting securities or fifty percent or more of the equity
interest.

                                      -1-
<PAGE>   2
        (b) "Closing" shall mean the date of the initial sale of shares of the
Company's Series C Preferred Stock.

        (c) "Commission" shall mean the Securities and Exchange Commission or
any other federal agency at the time administering the Securities Act.

        (d) "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended, or any similar successor federal statute and the rules and regulations
thereunder, all as the same shall be in effect from time to time.

        (e) "Holder" shall mean any Investor who holds Registrable Securities
and any holder of Registrable Securities to whom the registration rights
conferred by this Agreement have been transferred in compliance with Section
1.11 and Section 3 hereof.

        (f) "Initiating Holders" shall mean any Holder or Holders who in the
aggregate hold not less than twenty-five percent (25%) of the outstanding
Registrable Securities.

        (g) "Investors" shall mean persons who: (i) purchased Shares pursuant to
the Series D Preferred Stock Purchase Agreement, dated as of the date hereof
(ii) possessed registration rights pursuant to the 1999 Rights Agreement or
(iii) hold warrants to purchase Series C Preferred Stock.

        (h) "Other Shareholders" shall mean persons other than Holders who, by
virtue of agreements with the Company, are entitled to include their securities
in certain registrations hereunder.

        (i) "Registrable Securities" shall mean (i) shares of the Company's
Common Stock (the "Common Stock") issued or issuable pursuant to the conversion
of the Shares, (ii) any shares of stock or other securities into which or for
which shares of Common Stock issued or issuable pursuant to the conversion of
the Shares may hereafter be changed, converted or exchanged and any other shares
or securities issued to holders of Common Stock (or such shares of stock or
other securities into which or for which shares of Common Stock are so changed,
converted or exchanged) upon any reclassification, share combination, share
subdivision, share dividend, share exchange, merger, consolidation or similar
transaction or event and (iii) any Common Stock issued as a dividend or other
distribution with respect to or in exchange for or in replacement of the shares
referenced in (i) and (ii) above provided, however, that Registrable Securities
shall not include any shares of Common Stock or shares of stock or other
securities referenced in (ii) above which have previously been registered or
which have been sold to the public either pursuant to a registration statement
or Rule 144, or which have been sold in a private transaction in which the
transferor's rights under this Agreement are not assigned.

        (j) The terms "register," "registered" and "registration" shall refer to
a registration effected by preparing and filing a registration statement in
compliance with the Securities Act and applicable rules and regulations
thereunder, and the declaration or ordering of the effectiveness of such
registration statement.

        (k) "Registration Expenses" shall mean all expenses incurred in
effecting any registration pursuant to this Agreement, including, without
limitation, all registration,

                                      -2-
<PAGE>   3
qualification, and filing fees, printing expenses, escrow fees, fees and
disbursements of counsel for the Company, blue sky fees and expenses, expenses
of any regular or special audits incident to or required by any such
registration, and the reasonable fees and disbursements of one counsel for the
Holders, selected by a majority in interest of the Holders, (but excluding the
compensation of regular employees of the Company, which shall be paid in any
event by the Company).

        (l) "Rule 144" shall mean Rule 144 as promulgated by the Commission
under the Securities Act, as such Rule may be amended from time to time, or any
similar successor rule that may be promulgated by the Commission.

        (m) "Rule 145" shall mean Rule 145 as promulgated by the Commission
under the Securities Act, as such Rule may be amended from time to time, or any
similar successor rule that may be promulgated by the Commission.

        (n) "Securities Act" shall mean the Securities Act of 1933, as amended,
or any similar successor federal statute and the rules and regulations
thereunder, all as the same shall be in effect from time to time.

        (o) "Selling Expenses" shall mean all underwriting discounts and selling
commissions applicable to the sale of Registrable Securities and the reasonable
fees and disbursements of counsel for any Holder (other than the fees and
disbursements of counsel included in Registration Expenses).

        (p) "Shares" shall mean collectively the Company's Series A, Series B,
Series C and Series D Preferred Stock currently outstanding or issuable upon
exercise of warrants therefor.

        1.2 Requested Registration.

        (a) Request for Registration. If the Company shall receive from the
Initiating Holders at any time after the earlier of (i) December 17, 2003 or
(ii) nine (9) months after the effective date of the first registration
statement filed by the Company covering an underwritten offering of any of its
securities to the general public, a written request that the Company effect any
registration with respect to shares of Registrable Securities with an expected
aggregate offering price, net of underwriting discounts and expenses related to
the issuance, to the public exceeding $5,000,000 for an initial public offering
or, in the event of a secondary offering, exceeding $2,500,000, the Company
will:

                (i) promptly give written notice of the proposed registration to
        all other Holders; and

                (ii) as soon as practicable, use its best efforts to effect such
        registration (including, without limitation, filing post-effective
        amendments, appropriate qualifications under applicable blue sky or
        other state securities laws, and appropriate compliance with the
        Securities Act) as would permit or facilitate the sale and distribution
        of all such Registrable Securities as are specified in such request,
        together with all of the Registrable Securities of any Holder or Holders
        joining in such request as are specified in a written request received
        by the

                                      -3-
<PAGE>   4
Company within twenty (20) days after such written notice from the Company is
mailed or delivered.

        The Company shall not be obligated to effect, or to take any action to
effect, any such registration pursuant to this Section 1.2:

               (A) In any particular jurisdiction in which the Company would be
        required to execute a general consent to service of process in effecting
        such registration, qualification, or compliance, unless the Company is
        already subject to service in such jurisdiction and except as may be
        required by the Securities Act;

               (B) After the Company has initiated two such registrations
        pursuant to this Section 1.2(a) (counting for these purposes only
        registrations which have been declared or ordered effective and pursuant
        to which securities have been sold and registrations which have been
        withdrawn by the Holders as to which the Holders have not elected to
        bear the Registration Expenses pursuant to Section 1.4 hereof and would,
        absent such election, have been required to bear such expenses);

               (C) During the period starting with the date sixty (60) days
        prior to the Company's good faith estimate of the date of filing of, and
        ending on a date one hundred eighty (180) days after the effective date
        of, a Company-initiated registration; provided that the Company is
        actively employing in good faith all reasonable efforts to cause such
        registration statement to become effective, and provided that the
        Company may only invoke this subsection (C) once;

               (D) If the Initiating Holders propose to dispose of shares of
        Registrable Securities which may be immediately registered on Form S-3
        pursuant to a request made under Section 1.5 hereof;

               (E) If the Initiating Holders do not request that such offering
        be underwritten by underwriters selected by the Initiating Holders
        (subject to the consent of the Company, which consent will not be
        unreasonably withheld on a firm commitment basis); or

               (F) If the Company and the Initiating Holders are unable to
        obtain the commitment of the underwriter described in clause (E) above
        to firmly underwrite the offer.

        (b) Subject to the foregoing clauses (A) through (F), the Company shall
file a registration statement covering the Registrable Securities so requested
to be registered as soon as practicable after receipt of the request or requests
of the Initiating Holders; provided, however, that if (i) in the good faith
judgment of the Board of Directors of the Company, such registration would be
seriously detrimental to the Company and the Board of Directors of the Company
concludes, as a result, that it is essential to defer the filing of such
registration statement at such time, and (ii) the Company shall furnish to such
Holders a certificate signed by the President of the Company stating that in the
good faith judgment of the Board of Directors of the Company, it would be
seriously detrimental to the Company for such registration statement to be filed
in the near future and that it is, therefore, essential to defer the filing of
such registration statement, then the Company shall have the right to defer such
filing for the period during which such

                                      -4-
<PAGE>   5
disclosure would be seriously detrimental, provided that (except as provided in
clause (C) above) the Company may not defer the filing for a period of more than
one hundred eighty (180) days after receipt of the request of the Initiating
Holders, and, provided further, that the Company shall not defer its obligation
in this manner more than once.

        The registration statement filed pursuant to the request of the
Initiating Holders may, subject to the provisions of Section 1.13 hereof,
include other securities of the Company, with respect to which registration
rights have been granted, and may include securities of the Company being sold
for the account of the Company.

        (c) Underwriting. The right of any Holder to registration pursuant to
Section 1.2 shall be conditioned upon such Holder's participation in such
underwriting and the inclusion of such Holder's Registrable Securities in the
underwriting (unless otherwise mutually agreed by a majority in interest of the
Initiating Holders and such Holder with respect to such participation and
inclusion) to the extent provided herein. A Holder may elect to include in such
underwriting all or a part of the Registrable Securities he holds.

        (d) Procedures. If the Company shall request inclusion in any
registration pursuant to Section 1.2 of securities being sold for its own
account, or if other persons shall request inclusion in any registration
pursuant to Section 1.2, the Initiating Holders shall, on behalf of all Holders,
offer to include such securities in the underwriting and may condition such
offer on their acceptance of the further applicable provisions of this Section 1
(including Section 1.12). The Company shall (together with all Holders and other
persons proposing to distribute their securities through such underwriting)
enter into an underwriting agreement in customary form with the representative
of the underwriter or underwriters selected for such underwriting by a majority
in interest of the Initiating Holders, which underwriters are reasonably
acceptable to the Company. Notwithstanding any other provision of this Section
1.2, if the representative of the underwriters advises the Initiating Holders in
writing that marketing factors require a limitation on the number of shares to
be underwritten, the number of shares to be included in the underwriting or
registration shall be allocated as set forth in Section 1.13 hereof. If a person
who has requested inclusion in such registration as provided above does not
agree to the terms of any such underwriting, such person shall be excluded
therefrom by written notice from the Company, the underwriter or the Initiating
Holders. The securities so excluded shall also be withdrawn from registration.
If shares are so withdrawn from the registration and if the number of shares to
be included in such registration was previously reduced as a result of marketing
factors pursuant to this Section 1.2(d), then the Company shall offer to all
Holders who have retained rights to include securities in the registration the
right to include additional securities in the registration in an aggregate
amount equal to the number of shares so withdrawn, with such shares to be
allocated among such Holders requesting additional inclusion in accordance with
Section 1.13, provided, however, that the number of shares of Registrable
Securities to be included in such underwriting and registration will not be
reduced unless all other securities of Company (not including securities to be
issued as part of the offering) are first entirely excluded from the
underwriting and registration, and provided further, that in no event will the
number of Registrable Securities to be included in any such registration be
reduced below 30% of the shares included in the registration. Any Registrable
Securities excluded and withdrawn from such underwriting will be withdrawn from
the registration.

                                      -5-
<PAGE>   6
        1.3 Company Registration.

        (a) If the Company shall determine to register any of its securities
either for its own account or the account of a security holder or holders
exercising their respective demand registration rights (other than pursuant to
Section 1.2 or 1.5 hereof), other than a registration relating solely to
employee benefit plans, or a registration relating solely to a Rule 145
transaction, or a registration on any registration form that does not permit
secondary sales, the Company will:

               (i) promptly give to each Holder written notice thereof, but in
        no event less than 30 days prior to the filing of any registration
        statement; and

               (ii) include in such registration (and any related qualification
        under blue sky laws or other compliance), except as set forth in Section
        1.3(b) below, and in any underwriting involved therein, all the
        Registrable Securities specified in a written request or requests made
        by any Holder and received by the Company within twenty (20) days after
        the written notice from the Company described in clause (i) above is
        mailed or delivered by the Company. Such written request may specify all
        or a part of a Holder's Registrable Securities.

        (b) Underwriting. If the registration of which the Company gives notice
is for a registered public offering involving an underwriting, the Company shall
so advise the Holders as a part of the written notice given pursuant to Section
1.3(a)(i). In such event, the right of any Holder to registration pursuant to
this Section 1.3 shall be conditioned upon such Holder's participation in such
underwriting and the inclusion of such Holder's Registrable Securities in the
underwriting to the extent provided herein. All Holders proposing to distribute
their securities through such underwriting shall (together with the Company and
the other holders of securities of the Company with registration rights to
participate therein distributing their securities through such underwriting)
enter into an underwriting agreement in customary form with the representative
of the underwriter or underwriters selected by the Company.

        Notwithstanding any other provision of this Agreement, if the managing
underwriter determine(s) in good faith that marketing factors require a
limitation of the number of shares to be underwritten, then the managing
underwriter(s) may exclude shares (including Registrable Securities) from the
registration and the underwriting, and the number of shares that may be included
in the registration and the underwriting will be allocated first, to Company,
and second, to each of the Holders requesting inclusion of their Registrable
Securities in such registration statement on a pro rata basis based on the total
number of Registrable Securities then held by each such Holder provided,
however, that the right of the underwriters to exclude shares (including
Registrable Securities) from the registration and underwriting as described
above will be restricted so that the number of Registrable Securities included
in any such registration is not reduced below 20% of the shares included in the
registration. Notwithstanding the foregoing, if the registration is the first
Company-initiated registered offering of the Company's securities to the general
public, the Company may limit, to the extent so advised by the underwriters, on
a pro rata basis according to the number of securities each shareholder
(including the Holders) has requested for registration, the amount of securities
(including Registrable Securities) to be included in the registration by the
Company's shareholders (including the Holders), or may

                                      -6-
<PAGE>   7
exclude, to the extent so advised by the underwriters, such underwritten
securities entirely from such registration.

        If shares are so withdrawn from the registration and if the number of
shares of Registrable Securities to be included in such registration was
previously reduced as a result of marketing factors, the Company shall then
offer to all persons who have retained the right to include securities in the
registration the right to include additional securities in the registration in
an aggregate amount equal to the number of shares so withdrawn, with such shares
to be allocated among the persons requesting additional inclusion in accordance
with Section 1.13 hereof.

        1.4 Expenses of Registration. All Registration Expenses incurred in
connection with any registration, qualification or compliance pursuant to
Sections 1.3 and 1.5 hereof, and the first two registrations pursuant to Section
1.2 hereof, and reasonable fees and disbursements of one counsel for the selling
Holders in the case of registrations pursuant to Sections 1.2, 1.3 and 1.5 shall
be borne by the Company; provided, however, that if the Holders bear the
Registration Expenses for any registration begun pursuant to Section 1.2 and
subsequently withdrawn by the Holders registering shares therein, such
registration proceeding shall not be counted as a requested registration
pursuant to Section 1.2 hereof, except in the event that such withdrawal is
based upon material adverse information relating to the Company that is
different from the information known or available (upon request from the Company
or otherwise) to the Holders requesting registration at the time of their
request for registration under Section 1.2, in which event such registration
shall not be treated as a counted registration for purposes of Section 1.2
hereof, even though the Holders do not elect to bear the Registration Expenses
for such registration. All Selling Expenses relating to securities so registered
shall be borne by the holders of such securities pro rata on the basis of the
number of shares of securities so registered on their behalf.

        1.5 Registration on Form S-3.

        (a) After its initial public offering, the Company shall use its best
efforts to qualify for registration on Form S-3 or any comparable or successor
form or forms. After the Company has qualified for the use of Form S-3, in
addition to the rights contained in the foregoing provisions of this Section 1,
the Holders of Registrable Securities shall have the right to request
registrations on Form S-3 (such requests shall be in writing and shall state the
number of shares of Registrable Securities to be disposed of and the intended
methods of disposition of such shares by such Holder or Holders), provided,
however, that the Company shall not be obligated to effect any such registration
if (i) the Holders, together with the holders of any other securities of the
Company entitled to inclusion in such registration, propose to sell Registrable
Securities and such other securities (if any) on Form S-3 at an aggregate price
to the public of less than $500,000, or (ii) in the event that the Company shall
furnish the certification described in paragraph 1.2(b)(ii) (but subject to the
limitations set forth therein) or (iii) in a given twelve (12) month period,
after the Company has effected two (2) such registrations in any such period.

        (b) If a request complying with the requirements of Section 1.5(a)
hereof is delivered to the Company, the provisions of Sections 1.2(a)(i) and
(ii) and Section 1.2(b) hereof shall apply to such registration. If the
registration is for an underwritten offering, the provisions of

                                      -7-
<PAGE>   8
Sections 1.2(c) and 1.2(d) hereof shall apply to such registration. Any
registration on Form S-3 will not be deemed to be a Requested Registration under
Section 1.2.

        1.6 Registration Procedures. In the case of each registration effected
by the Company pursuant to Section 1, the Company will keep each Holder advised
in writing as to the initiation of each registration and as to the completion
thereof. At its expense, the Company will use its best efforts to:

        (a) Keep such registration effective for a period of one hundred twenty
(120) days or until the Holder or Holders have completed the distribution
described in the registration statement relating thereto, whichever first
occurs; provided, however, that (i) such one hundred twenty (120) day period
shall be extended for a period of time equal to the period the Holder refrains
from selling any securities included in such registration at the request of an
underwriter of Common Stock (or other securities) of the Company; and (ii) the
case of any registration of Registrable Securities on Form S-3 which are
intended to be offered on a continuous or delayed basis, such one hundred twenty
(120) day period shall be extended, if necessary, to keep the registration
statement effective until all such Registrable Securities are sold, provided
that Rule 415 as promulgated by the Commission under the Securities Act, or any
successor rule under the Securities Act, permits an offering on a continuous or
delayed basis, and provided further that applicable rules under the Securities
Act governing the obligation to file a post-effective amendment permit, in lieu
of filing a post-effective amendment that (A) includes any prospectus required
by section 10(a)(3) of the Securities Act or (B) reflects facts or events
representing a material or fundamental change in the information set forth in
the registration statement, the incorporation by reference of information
required to be included in (A) and (B) above to be contained in periodic reports
filed pursuant to section 13 or 15(d) of the Exchange Act in the registration
statement;

        (b) Prepare and file with the Commission such amendments and supplements
to such registration statement and the prospectus used in connection with such
registration statement as may be necessary to comply with the provisions of the
Securities Act with respect to the disposition of all securities covered by such
registration statement;

        (c) Furnish such number of prospectuses and other documents incident
thereto, including any amendment of or supplement to the prospectus, as a Holder
from time to time may reasonably request;

        (d) Notify each seller of Registrable Securities covered by such
registration statement at any time when a prospectus relating thereto is
required to be delivered under the Securities Act of the happening of any event
as a result of which the prospectus included in such registration statement, as
then in effect, contains an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading in light of the circumstances under which they
were made, and at the request of any such seller, prepare and furnish to such
seller a reasonable number of copies of a supplement to or an amendment of such
prospectus as may be necessary so that, as thereafter delivered to the
purchasers of such shares, such prospectus shall not include an untrue statement
of a material fact or omit to state a material fact required to be stated
therein or necessary to make the statements therein not misleading in light of
the circumstances under which it was made;

                                      -8-
<PAGE>   9
        (e) Cause all such Registrable Securities registered pursuant hereunder
to be listed or quoted on each securities exchange or automated dealer quotation
system on which similar securities issued by the Company are then listed or
quoted;

        (f) Provide a transfer agent and registrar for all Registrable
Securities registered pursuant to such registration statement and a CUSIP number
for all such Registrable Securities, in each case not later than the effective
date of such registration;

        (g) In connection with any underwritten offering pursuant to a
registration statement filed pursuant to Section 1.2 hereof, the Company will
enter into an underwriting agreement reasonably necessary to effect the offer
and sale of Registrable Securities, provided such underwriting agreement
contains customary underwriting provisions and provided further that if the
underwriter so requests the underwriting agreement will contain customary
contribution provisions.

        (h) Register and qualify securities covered by such registration
statement under such other securities or Blue Sky laws of such jurisdiction as
shall reasonably be requested by the Holders, however, the Company shall not be
obligated to register and qualify securities in any particular jurisdiction in
which the Company would be required to execute a general consent to service of
process in effecting such registration, qualification, or compliance, unless the
Company is already subject to service in such jurisdiction and except as may be
required by the Securities Act.

        1.7 Indemnification.

        (a) The Company will indemnify each Holder, each of its officers,
directors and partners, legal counsel, and accountants and each person
controlling such Holder within the meaning of section 15 of the Securities Act
or section 20 of the Exchange Act, with respect to which registration,
qualification, or compliance has been effected pursuant to this Section 1, and
each underwriter, if any, and each person who controls within the meaning of
section 15 of the Securities Act or section 20 of the Exchange Act, any
underwriter, against all expenses, claims, losses, damages, and liabilities (or
actions, proceedings, or settlements in respect thereof) arising out of or based
on any untrue statement (or alleged untrue statement) of a material fact
contained in any registration statement, prospectus, offering circular, or other
document (including any related registration statement, notification, or the
like) incident to any such registration, qualification, or compliance, or based
on any omission (or alleged omission) to state therein a material fact required
to be stated therein or necessary to make the statements therein not misleading,
or any violation by the Company of the Securities Act or any rule or regulation
thereunder applicable to the Company and relating to action or inaction required
of the Company in connection with any such registration, qualification, or
compliance, and will reimburse each such Holder, each of its officers,
directors, partners, legal counsel, and accountants and each person controlling
such Holder, each such underwriter, and each person who controls any such
underwriter, for any legal and any other expenses reasonably incurred in
connection with investigating and defending or settling any such claim, loss,
damage, liability, or action, provided that the Company will not be liable in
any such case to the extent that any such claim, loss, damage, liability, or
expense arises out of or is based on any untrue statement or omission made in
conformity with written information furnished to the Company by such Holder or
underwriter

                                      -9-
<PAGE>   10
and stated to be specifically for use therein. It is agreed that the indemnity
agreement contained in this Section 1.7(a) shall not apply to amounts paid in
settlement of any such loss, claim, damage, liability, or action if such
settlement is effected without the consent of the Company (which consent has not
been unreasonably withheld).

        (b) Each Holder will, if Registrable Securities held by him are included
in the securities as to which such registration, qualification, or compliance is
being effected, indemnify the Company, each of its directors, officers,
partners, legal counsel, and accountants and each underwriter, if any, of the
Company's securities covered by such a registration statement, each person who
controls the Company or such underwriter within the meaning of section 15 of the
Securities Act (or section 20 of the Exchange Act), each other such Holder and
Other Shareholder, and each of their officers, directors, and partners, and each
person controlling such Holder or Other Shareholder, against all claims, losses,
damages and liabilities (or actions in respect thereof) arising out of or based
on any untrue statement (or alleged untrue statement) of a material fact
contained in any such registration statement, prospectus, offering circular, or
other document, or any omission (or alleged omission) to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, and will reimburse the Company and such Holders, Other
Shareholders, directors, officers, partners, legal counsel, and accountants,
persons, underwriters, or control persons for any legal or any other expenses
reasonably incurred in connection with investigating or defending any such
claim, loss, damage, liability, or action, in each case to the extent, but only
to the extent, that such untrue statement (or alleged untrue statement) or
omission (or alleged omission) is made in such registration statement,
prospectus, offering circular, or other document in reliance upon and in
conformity with written information furnished to the Company by such Holder and
stated to be specifically for use therein provided, however, that the
obligations of such Holder hereunder shall not apply to amounts paid in
settlement of any such claims, losses, damages, or liabilities (or actions in
respect thereof) if such settlement is effected without the consent of such
Holder (which consent shall not be unreasonably withheld), provided, that in no
event shall any indemnity under this Subsection 1.7(b) exceed the net proceeds
from the offering received by such Holder, except in the case of willful fraud
by such Holder.

        (c) Each party entitled to indemnification under this Section 1.7 (the
"Indemnified Party") shall give notice to the party required to provide
indemnification (the "Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought, and shall
permit the Indemnifying Party to assume the defense of such claim or any
litigation resulting therefrom, provided that counsel for the Indemnifying
Party, who shall conduct the defense of such claim or any litigation resulting
therefrom, shall be approved by the Indemnified Party (whose approval shall not
unreasonably be withheld), and the Indemnified Party may participate in such
defense at such party's expense, and provided further that the failure of any
Indemnified Party to give notice as provided herein shall not relieve the
Indemnifying Party of its obligations under this Section 1, to the extent such
failure is not prejudicial. No Indemnifying Party, in the defense of any such
claim or litigation, shall, except with the consent of each Indemnified Party,
consent to entry of any judgment or enter into any settlement that does not
include as an unconditional term thereof the giving by the claimant or plaintiff
to such Indemnified Party of a release from all liability in respect to such
claim or litigation. Each Indemnified Party shall furnish such information
regarding itself or the claim in

                                      -10-
<PAGE>   11
question as an Indemnifying Party may reasonably request in writing and as shall
be reasonably required in connection with defense of such claim and litigation
resulting therefrom.

        (d) If the indemnification provided for in this Section 1.7 is held by a
court of competent jurisdiction to be unavailable to an Indemnified Party with
respect to any loss, liability, claim, damage, or expense referred to therein,
then the Indemnifying Party, in lieu of indemnifying such Indemnified Party
hereunder, shall contribute to the amount paid or payable by such Indemnified
Party as a result of such loss, liability, claim, damage, or expense in such
proportion as is appropriate to reflect the relative fault of the Indemnifying
Party on the one hand and of the Indemnified Party on the other in connection
with the statements or omissions that resulted in such loss, liability, claim,
damage, or expense as well as any other relevant equitable considerations. The
relative fault of the Indemnifying Party and of the Indemnified Party shall be
determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission to state a material fact
relates to information supplied by the Indemnifying Party or by the Indemnified
Party and the parties' relative intent, knowledge, access to information, and
opportunity to correct or prevent such statement or omission.

        (e) Notwithstanding the foregoing, to the extent that the provisions on
indemnification and contribution contained in the underwriting agreement entered
into in connection with the underwritten public offering are in conflict with
the foregoing provisions, the provisions in the underwriting agreement shall
control.

        (f) The obligations of the Company and the Holders under this Section
1.7 shall survive the completion of any offering of Registrable Securities in a
registration statement under this Section 1, and otherwise.

        1.8 Information by Holder. Each Holder of Registrable Securities shall
furnish to the Company such information regarding such Holder and the
distribution proposed by such Holder as the Company may reasonably request in
writing and as shall be reasonably required in connection with any registration,
qualification, or compliance referred to in this Section 1.

        1.9 Limitations on Registration of Issues of Securities. From and after
the date of this Agreement, the Company shall not, without the prior written
consent of a majority in interest of the Holders, enter into any agreement with
any holder or prospective holder of any securities of the Company giving such
holder or prospective holder any registration rights the terms of which are more
favorable than the registration rights granted to the Holders hereunder
(including demand registration rights which may be requested by such holder or
prospective holder prior to the time that the Holders may request registration
under Section 1.2 hereof).

        1.10 Rule 144 Reporting. With a view to making available the benefits of
certain rules and regulations of the Commission that may permit the sale of the
Restricted Securities to the public without registration, the Company agrees to
use its best efforts to:

        (a) Make and keep public information regarding the Company available as
those terms are understood and defined in Rule 144 under the Securities Act, at
all times from and after

                                      -11-
<PAGE>   12
ninety (90) days following the effective date of the first registration under
the Securities Act filed by the Company for an offering of its securities to the
general public;

        (b) File with the Commission in a timely manner all reports and other
documents required of the Company under the Securities Act and the Exchange Act
at any time after it has become subject to such reporting requirements;

        (c) So long as a Holder owns any Restricted Securities, furnish to the
Holder forthwith upon written request a written statement by the Company as to
its compliance with the reporting requirements of Rule 144 (at any time from and
after ninety (90) days following the effective date of the first registration
statement filed by the Company for an offering of its securities to the general
public), and of the Securities Act and the Exchange Act (at any time after it
has become subject to such reporting requirements), a copy of the most recent
annual or quarterly report of the Company, and such other reports and documents
so filed as a Holder may reasonably request in availing itself of any rule or
regulation of the Commission allowing a Holder to sell any such securities
without registration.

        1.11 Transfer or Assignment of Registration Rights. The rights to cause
the Company to register securities granted to a Holder by the Company under this
Section 1 may be transferred or assigned by a Holder only to (i) an affiliate
(as defined in the Securities Act) of such Holder or (ii) a transferee or
assignee of not less than 80,000 shares of Registrable Securities (as presently
constituted and subject to subsequent adjustments for stock splits, stock
dividends, reverse stock splits, and the like), provided that the Company is
given written notice at the time of or within a reasonable time after such
transfer or assignment, stating the name and address of the transferee or
assignee and identifying the securities with respect to which such registration
rights are being transferred or assigned in accordance with the requirements of
Section 3, and, provided further, that the transferee or assignee of such rights
assumes the obligations of such Holder under this Agreement.

        1.12 "Market Stand-Off" Agreement. If requested by the Company and an
underwriter of Common Stock (or other securities) of the Company, a Holder shall
not sell or otherwise transfer or dispose of any Common Stock (or other
securities) of the Company held by such Holder (other than those included in the
registration) during the one hundred eighty (180) day period following the
effective date of a registration statement if it is the first such registration
statement of the Company, and ninety (90) days in any subsequent offering,
provided that the Company uses its best efforts to have all of the Company's
officers, directors and employees then holding Company Stock enter into similar
agreements.

        The obligations described in this Section 1.12 shall not apply to a
registration relating solely to employee benefit plans on Form S-1 or Form S-8
or similar forms that may be promulgated in the future, or a registration
relating solely to a Commission Rule 145 transaction on Form S-4 or similar
forms that may be promulgated in the future. The Company may impose
stop-transfer instructions with respect to the shares (or securities) subject to
the foregoing restriction until the end of such one hundred eighty (180) day (or
ninety (90) day) period.

        1.13 Allocation of Registration Opportunities. In any circumstance in
which all of the Registrable Securities and other shares of Common Stock of the
Company (including shares of

                                      -12-
<PAGE>   13
Common Stock issued conform with inserts so Registrable Securities have priority
in registration over other shares or issuable upon conversion of shares of any
currently unissued series of Preferred Stock of the Company) with registration
rights (the "Other Shares") requested to be included in a registration on behalf
of the Holders or other selling shareholders cannot be so included as a result
of limitations of the aggregate number of shares of Registrable Securities and
Other Shares that may be so included, the number of shares of Registrable
Securities and Other Shares that may be so included shall be allocated among the
Holders and other selling shareholders requesting inclusion of shares pro rata
on the basis of the number of shares of Registrable Securities and Other Shares
that would be held by such Holders and other selling shareholders, assuming
conversion; provided, however, so that such allocation shall not operate to
reduce the aggregate number of Registrable Securities and Other Shares to be
included in such registration, if any Holder or other selling shareholder does
not request inclusion of the maximum number of shares of Registrable Securities
and Other Shares allocated to him pursuant to the above-described procedure, the
remaining portion of his allocation shall be reallocated among those requesting
Holders and other selling shareholders whose allocations did not satisfy their
requests pro rata on the basis of the number of shares of Registrable Securities
and Other Shares which would be held by such Holders and other selling
shareholders, assuming conversion, and this procedure shall be repeated until
all of the shares of Registrable Securities and Other Shares which may be
included in the registration on behalf of the Holders and other selling
shareholders have been so allocated. The Company shall not limit the number of
Registrable Securities to be included in a registration pursuant to this
Agreement in order to include shares held by shareholders with no registration
rights or to include founder's stock or any other shares of stock issued to
employees, officers, directors, or consultants pursuant to Company's 1998 Stock
Plan, or with respect to registrations under Section 1.5 or 1.8 hereof, in order
to include in such registration securities registered for the Company's own
account.

        1.14 Delay of Registration. No Holder shall have any right to take any
action to restrain, enjoin, or otherwise delay any registration as the result of
any controversy that might arise with respect to the interpretation or
implementation of this Section 1.

        1.15 Termination of Registration Rights. The right of any Holder to
request registration or inclusion in any registration pursuant to Section 1.2,
1.3 or 1.5 shall terminate on the closing of the first Company-initiated
registered public offering of Common Stock of the Company, provided that all
shares of Registrable Securities held or entitled to be held upon conversion by
such Holder may immediately be sold under Rule 144 during the following ninety
(90) day period, or on such date after the closing of the first
Company-initiated registered public offering of Common Stock of the Company as
all shares of Registrable Securities held or entitled to be held upon conversion
by such Holder may immediately be sold under Rule 144 during any ninety (90) day
period; provided, however, that the provisions of this Section 1.15 shall not
apply to any Holder who owns more than two percent (2%) of the Company's
outstanding stock until the earlier of (x) such time as such Holder owns less
than two percent (2%) of the outstanding stock of the Company, or (y) the
expiration of two (2) years after the closing of the first registered public
offering of Common Stock of the Company.

                                      -13-
<PAGE>   14
                                    SECTION 2

                            Covenants of the Company

        The Company hereby covenants and agrees, so long as any Holder owns any
Registrable Securities, as follows:

        2.1 Basic Financial Information. The Company will furnish the following
reports to each Holder:

        (a) As soon as practicable after the end of each fiscal year of the
Company, and in any event within ninety (90) days thereafter, a consolidated
balance sheet of the Company and its subsidiaries, if any, as at the end of such
fiscal year, and consolidated statements of income and cash flows of the Company
and its subsidiaries, if any, for such year, prepared and audited by a
nationally recognized accounting firm in accordance with generally accepted
accounting principles consistently applied and setting forth in each case in
comparative form the figures for the previous fiscal year, all in reasonable
detail.

        (b) As soon as practicable after the end of each quarterly accounting
period in each fiscal year of the Company, and in any event within forty-five
(45) days thereafter, a consolidated balance sheet of the Company and its
subsidiaries, if any, as of the end of each such quarterly period, and
consolidated statements of income and cash flows of the Company and its
subsidiaries for such period and for the current fiscal year to date, prepared
in accordance with generally accepted accounting principles consistently applied
and setting forth in comparative form the figures for the corresponding periods
of the previous fiscal year and to the Company's operating plan then in effect
and approved by its Board of Directors, subject to changes resulting from normal
year-end audit adjustments, all in reasonable detail and certified by the
principal financial or accounting officer of the Company, except that such
financial statements need not contain the notes required by generally accepted
accounting principles.

        (c) As soon as practicable before the beginning of the Company's fiscal
year, and in any event at least thirty (30) days before the beginning of the
Company's fiscal year, an annual budget and operating plan.

        (d) From the date the Company becomes subject to the reporting
requirements of the Exchange Act (which shall include any successor federal
statute), and in lieu of the financial information required pursuant to Sections
2.1(a) and (b), copies of its annual reports on Form 10-K and its quarterly
reports on Form 10-Q, respectively.

        2.2 Right of Participation. The Company hereby grants to each Holder who
owns any Shares or any shares of Common Stock issued upon conversion of the
Shares the right of participation to purchase a pro rata share of New Securities
(as defined below) which the Company may, from time to time, propose to sell and
issue. A Holder's pro rata share, for purposes of this right of participation,
is the ratio of the number of shares of Common Stock owned by such Holder
immediately prior to the issuance of New Securities, assuming full conversion of
the Shares and exercise of any option or warrant held by such Holder which is
exercisable at such time, to the total number of shares of Common Stock
outstanding

                                      -14-
<PAGE>   15
immediately prior to the issuance of New Securities, assuming full conversion of
the Shares and exercise of all outstanding rights, options and warrants to
acquire Common Stock of the Company. Each Holder shall have a right of
over-allotment such that if any Holder fails to exercise its right hereunder to
purchase its pro rata share of New Securities, the other Holders may purchase
the non-purchasing Holder's portion on a pro rata basis within ten (10) days
from the date such non-purchasing Holder fails to exercise its right hereunder
to purchase its pro rata share of New Securities. This right of participation
shall be subject to the following provisions:

        (a) "New Securities" shall mean any capital stock (including Common
Stock and/or Preferred Stock) of the Company whether now authorized or not, and
rights, options or warrants to purchase such capital stock, and securities of
any type whatsoever that are, or may become, convertible into capital stock;
provided that the term "New Securities" does not (i) securities issued upon
conversion of the Shares; (ii) securities issued pursuant to the acquisition of
another business entity or business segment of any such entity by the Company by
merger, purchase of substantially all the assets or other reorganization whereby
the Company will own more than fifty percent (50%) of the voting power of such
business entity or business segment of any such entity; (iii) any borrowings,
direct or indirect, from financial institutions or other persons by the Company,
whether or not presently authorized, including any type of loan or payment
evidenced by any type of debt instrument, provided such borrowings do not have
any equity features including warrants, options or other rights to purchase
capital stock and are not convertible into capital stock of the Company; (iv)
securities issued to employees, consultants, officers or directors of the
Company pursuant to any stock option, stock purchase or stock bonus plan,
agreement or arrangement approved by the Board of Directors, provided such
securities do not exceed 10,400,000; (v) securities issued to vendors or
customers or to other persons in similar commercial situations with the Company
or securities issued in connection with obtaining financing, whether issued to a
lender, lessor, guarantor or other person if such issuance is approved by the
Board of Directors; provided that in any twelve (12) month period the number of
shares issued under Section 2.2(a)(v) do not exceed one percent (1%) of the then
outstanding shares of Common Stock; (vi) securities issued in a public offering
pursuant to a registration under the Securities Act with an aggregate offering
price to the public of at least $20,000,000 at a public offering price of at
least $12.50 per share; (vii) securities issued in connection with any stock
split, stock dividend or recapitalization of the Company; (viii) securities
issued to strategic investors involving technology transfers or similar items
critical to expansion and improvement of the Company's business; and (ix) any
right, option or warrant to acquire any security convertible into the securities
excluded from the definition of New Securities pursuant to subsections (i)
through (viii) above. For purposes of subsection (v), the number of shares of
Common Stock outstanding shall be calculated as if all shares of the Preferred
Stock of the Company and all securities convertible into Common Stock of the
Company ("Convertible Securities") had been fully converted into shares of
Common Stock immediately prior to such calculation, any outstanding warrants,
outstanding options and any remaining options under the corporation's stock
option plan or other rights for the purchase of shares of stock or Convertible
Securities had been fully exercised immediately prior to such calculation and
any remaining options under the corporation's stock option plan had been issued
(and the resulting securities fully converted into shares of Common Stock, if so
convertible in each case) as of such date.

        (b) In the event the Company proposes to undertake an issuance of New
Securities, it shall give each Holder written notice of its intention,
describing the type of New Securities, and

                                      -15-
<PAGE>   16
their price and the general terms upon which the Company proposes to issue the
same. Each Holder shall have twenty (20) days after the date of any such notice
to elect to purchase such Holder's pro rata share of such New Securities for the
price and upon the terms specified in the notice by giving written notice to the
Company and stating therein the quantity of New Securities to be purchased.

        (c) In the event the Holders fail to exercise fully the right of
participation within such twenty (20) day period and after the expiration of the
ten (10) day period for the exercise of the over-allotment provisions of this
Section 2.2, the Company shall have ninety (90) days thereafter to sell or enter
into an agreement (pursuant to which the sale of New Securities covered thereby
shall be closed, if at all, within ninety (90) days from the date of such
agreement) to sell the New Securities respecting which the Holders' right of
participation option set forth in this Section 2.2 was not exercised, at a price
and upon terms no more favorable to the purchasers thereof than specified in the
Company's notice to Holders pursuant to Section 2.2(b). In the event the Company
has not sold within such ninety (90) day period or entered into an agreement to
sell the New Securities in accordance with the foregoing within ninety (90) days
from the date of such agreement, the Company shall not thereafter issue or sell
any New Securities, without first again offering such securities to the Holders
in the manner provided in Section 2.2(b) above.

        (d) The right of participation granted under this Agreement shall expire
upon, and shall not be applicable to, the first sale of Common Stock of the
Company to the public effected pursuant to a registration statement filed with,
and declared effective by, the Commission under the Securities Act, with
proceeds of more than $20,000,000 and at a public offering price of at least
$12.50 per share.

        (e) The right of participation set forth in this Section 2.2 may not be
assigned or transferred, except that (i) such right is assignable by each Holder
to any wholly owned subsidiary or parent of, or to any corporation or entity
that is, within the meaning of the Securities Act an affiliate of and/or
controlling, controlled by or under common control with, any such Holder, and
(ii) such right is assignable between and among any of the Holders, and (iii) to
any transferee of at least 80,000 shares.

        2.3 Termination of Covenants. The covenants set forth in this Section 2
shall terminate and be of no further force and effect after the time of
effectiveness of the Company's first firm commitment underwritten public
offering registered under the Securities Act, with proceeds of more than
$20,000,000 and at a public offering price of at least $12.50 per share.

        2.4 Person Insurance. Following the Closing, the Company will seek to
obtain reasonable key person life insurance policies on the lives of Subrah S.
Iyar and Min Zhu, the proceeds of which will be payable to Company.

        2.5 Directors and Officers Liability Insurance. Promptly following the
Closing, Company will seek to procure an appropriate Directors and Officers
Liability insurance policy covering the directors and officers of Company in the
amount of at least $1,000,000, so long as in the opinion of the Board of
Directors the premiums are reasonable. Company will seek to increase the
coverage amount under such policy to at least $5,000,000 immediately prior to
the

                                      -16-
<PAGE>   17
closing of an underwritten public offering for the sale of Company's Common
Stock, so long as in the opinion of the Board of Directors the premiums are
reasonable.

                                    SECTION 3

                                 Stock Transfers

        3.1 Standstill Provisions. Without the prior written consent of the
Board of Directors, neither Vanenburg Ventures nor any of their affiliates may
acquire more than 15% of the Company's voting securities. If any such holder
holds more than 15% of the Company's voting securities, then any additional
acquisitions of the Company's voting securities by such holder requires the
prior written consent of the Board of Directors.

        3.2 Permitted Transfers. In addition to the transfer of Shares as
described in the Series D Preferred Stock Purchase Agreement, a Holder may
transfer (i) a minimum of 80,000 of its Shares and/or shares of Common Stock of
the Company (as adjusted for any stock splits, stock dividends, reverse stock
splits, and the like), (ii) all of its shares if such Holder holds fewer than
80,000, or (iii) any of its shares to an affiliate (as defined in the Securities
Act) subject to Section 1.11 and applicable securities laws.

        3.3 Right of First Refusal. The Company, is hereby granted the primary
right of first refusal (the "Primary First Refusal Right") and the Founders and
the Holders are granted the secondary right of first refusal (the "Secondary
First Refusal Right"), exercisable in connection with any proposed sale or other
transfer of Common Stock only (the "Target Shares") held by a Holder or his
assigns and a Founder (the "Selling Shareholder"). For purposes of this Section,
the term "transfer" shall include any assignment, pledge, encumbrance or other
disposition for value of the Target Shares intended to be made by the Selling
Shareholder, but shall not include any of the permitted transfers under Section
3.2.

        3.4 Notice of Intended Disposition. In the event a Selling Shareholder
desires to accept a bona fide third-party offer for any Target Shares, the
Selling Shareholder shall promptly (a) deliver to the Secretary of the Company a
written notice (the "Disposition Notice") of the offer and the basic terms and
conditions thereof, including the proposed purchase price and the identity of
the third-party offeror, and (b) provide satisfactory proof that the disposition
of the Target Shares to the third-party offeror would not contravene applicable
securities laws.

        3.5 Exercise of Right of First Refusal. The Company (or its assignees)
shall, for a period of twenty (20) days following receipt of the Disposition
Notice, have the right to purchase any or all of the Target Shares specified in
the Disposition Notice upon substantially the same terms and conditions
specified therein. Such right shall be exercisable by written notice (the
"Exercise Notice") delivered to the Selling Shareholder prior to the expiration
of the twenty (20) day exercise period. If such right is exercised with respect
to all or some of the Target Shares specified in the Disposition Notice, then
the Company (or its assignees) shall effect the purchase of such Target Shares,
including payment of the purchase price, not more than ten (10) business days
after delivery of the Exercise Notice; and at such time the Selling Shareholder
shall deliver to the Company the certificates representing the Target Shares to
be purchased, properly

                                      -17-
<PAGE>   18
endorsed for transfer. The Target Shares so purchased shall thereupon be
canceled and cease to be issued and outstanding shares of the Company's Common
Stock.

Should the purchase price specified in the Disposition Notice be payable in
property other than cash or evidences of indebtedness, the Company (or its
assignees) shall have the right to pay the purchase price in the form of cash
equal in amount to the value of such property. If the Selling Shareholder and
the Company (or its assignees) cannot agree on such cash value within ten (10)
days after the Company's receipt of the Disposition Notice, the valuation shall
be made by an appraiser of recognized standing selected by the Selling
Shareholder and the Company (or its assignees), or, if they cannot agree on an
appraiser within twenty (20) days after the Company's receipt of the Disposition
Notice, each shall select an appraiser of recognized standing and the two
appraisers shall designate a third appraiser of recognized standing, whose
appraisal shall be determinative of such value. The cost of such appraisal shall
be shared equally by the Selling Shareholder and the Company. The closing shall
then be held on the latter of (a) the fifth business day following delivery of
the Exercise Notice or (b) the 15th day after such cash valuation shall have
been made.

        3.6 Partial or Non-Exercise of the Primary Right of First Refusal. In
the event the Company does not deliver the Exercise Notice to the Selling
Shareholder within twenty (20) days following the date of the Company's receipt
of the Disposition Notice, or in the event the Company delivers an Exercise
Notice for a portion, but not all of the Target Shares, then the Selling
Shareholder shall promptly deliver a second Disposition Notice to the Founders
and the Holders (the "Remaining Shareholders"), at the addresses listed on
Schedule A hereto, describing the Target Shares remaining for sale along with
the basic terms and conditions thereof, including the proposed purchase price
and the identity of the third-party offeror. The Remaining Shareholders may
purchase their pro rata share of the remaining Target Shares pursuant to the
same procedures described in Section 3.5. A Remaining Shareholders' pro rata
share, for purposes of this Secondary Right of First Refusal, is the ratio of
the number of shares of Common Stock owned by such Remaining Shareholder at the
date of the second Disposition Notice, assuming full conversion of the Shares
and exercise of any option or warrant held by such Remaining Shareholder which
is exercisable at such time, to the total number of shares of Common Stock owned
by all Remaining Shareholders at the date of the second Disposition Notice,
assuming full conversion of the Shares and exercise of any option or warrant
held by any Remaining Shareholder which is exercisable at such time. Each
Remaining Shareholder shall have a right of over-allotment such that if any
Remaining Shareholder fails to exercise its right hereunder to purchase its pro
rata share of the Target Shares, the other Remaining Shareholders may purchase
the non-purchasing Remaining Shareholders' portion on a pro rata basis within
ten (10) days from the date such non-purchasing Holder fails to exercise its
right hereunder to purchase its pro rata share of the Target Shares.

        3.7 Partial or Non-Exercise of the Secondary Right of First Refusal. In
the event the Remaining Shareholders do not deliver any Exercise Notices to the
Selling Shareholder within twenty (20) days following the date of their receipt
of the second Disposition Notice, or in the event the Remaining Shareholders
deliver Exercise Notices for a portion, but not all of the Target Shares, and
the remainder of the Target Shares are not purchased pursuant to the right of
over-allotment provided for in Section 3.6, then the Selling Shareholder shall
have a period of sixty (60) days thereafter, in which to sell or otherwise
dispose of the Target Shares upon terms and

                                      -18-
<PAGE>   19
conditions (including the purchase price) no more favorable than those specified
in the Disposition Notices to the third-party offeror identified in the second
Disposition Notice; provided that any such sale or disposition must comply with
applicable state and federal securities laws and Section 1.11 of this Agreement.
If the Selling Shareholder does not sell or otherwise dispose of the Target
Shares within the specified sixty (60) day period, the First Refusal Right shall
continue to apply to any subsequent disposition of the Target Shares by the
Selling Shareholder until such right lapses in accordance with Section 3.8.

        3.8 Lapse. The First Refusal Right under this Section 3 shall lapse and
cease to have effect upon the closing of a firm commitment underwritten public
offering pursuant to a registration under the Securities Act with an aggregate
offering price to the public of at least $20,000,000 at a public offering price
of at least $12.50 per share.

        3.9 Legend. All certificates representing Shares or Common Stock subject
to the Right of First Refusal shall be endorsed with the following legend:

        "THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD,
        TRANSFERRED, ENCUMBERED OR IN ANY MANNER DISPOSED OF, EXCEPT IN
        COMPLIANCE WITH THE TERMS OF A WRITTEN AGREEMENT BETWEEN THE COMPANY AND
        THE INITIAL HOLDER HEREOF. SUCH AGREEMENT PROVIDES FOR CERTAIN
        RESTRICTIONS ON TRANSFER OF THE SECURITIES, INCLUDING RIGHTS OF FIRST
        REFUSAL UPON AN ATTEMPTED TRANSFER OF THE SECURITIES. THE SECRETARY OF
        THE COMPANY WILL UPON WRITTEN REQUEST FURNISH A COPY OF SUCH AGREEMENT
        TO THE HOLDER HEREOF WITHOUT CHARGE."

                                    SECTION 4

                                  Miscellaneous

        4.1 Governing law. This Agreement shall be governed in all respects by
the laws of the State of California, as if entered into by and between
California residents exclusively for performance entirely within California.

        4.2 Successors and Assigns. Except as otherwise expressly provided
herein, the provisions hereof shall inure to the benefit of, and be binding
upon, the successors, assigns, heirs, executors and administrators of the
parties hereto.

        4.3 Entire Agreement; Amendment; Waiver. This Agreement (including the
Exhibits hereto) constitutes the full and entire understanding and agreement
between the parties with regard to the subjects hereof and thereof. Neither this
Agreement nor any term hereof may be amended, waived, discharged or terminated,
except by a written instrument signed by the Company and the holders of a
majority of the Preferred shares (on an as converted basis) not resold to the
public and any such amendment, waiver, discharge or termination shall be binding
on all the Holders, but in no event shall the obligation of any Holder hereunder
be materially increased, except upon the written consent of such Holder.

                                      -19-
<PAGE>   20
        4.4 Notices, etc. All notices and other communications required or
permitted hereunder shall be in writing and shall be mailed by United States
first-class mail, postage prepaid, or delivered personally by hand or nationally
recognized courier addressed (a) if to a Holder, as indicated on the list of
Holders attached hereto as Schedule A, or at such other address as such holder
or permitted assignee shall have furnished to the Company in writing, or (b) if
to the Company, at WebEx, Inc., 110 Rose Orchard Way, San Jose, CA 95134, or at
such other address as the Company shall have furnished to each holder in
writing. All such notices and other written communications shall be effective
(i) if mailed, five (5) days after mailing and (ii) if delivered, upon delivery.

        4.5 Delays or Omissions. No delay or omission to exercise any right,
power or remedy accruing to any Holder, upon any breach or default of the
Company under this Agreement shall impair any such right, power or remedy of
such Holder nor shall it be construed to be a waiver of any such breach or
default, or an acquiescence therein, or of or in any similar breach or default
thereafter occurring; nor shall any waiver of any single breach or default be
deemed a waiver of any other breach or default therefore or thereafter
occurring. Any waiver, permit, consent or approval of any kind or character on
the part of any Holder of any breach or default under this Agreement or any
waiver on the part of any Holder of any provisions or conditions of this
Agreement must be made in writing and shall be effective only to the extent
specifically set forth in such writing. All remedies, either under this
Agreement or by law or otherwise afforded to any Holder, shall be cumulative and
not alternative.

        4.6 Rights; Separability. Unless otherwise expressly provided herein, a
Holder's rights hereunder are several rights, not rights jointly held with any
of the other Holders. In case any provision of the Agreement shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

        4.7 Information Confidential. Each Holder acknowledges that the
information received by them pursuant hereto may be confidential and for its use
only, and it will not use such confidential information in violation of the
Exchange Act or reproduce, disclose or disseminate such information to any other
person (other than its employees or agents having a need to know the contents of
such information, and its attorneys), except in connection with the exercise of
rights under this Agreement, unless the Company has made such information
available to the public generally or such Holder is required to disclose such
information by a governmental body.

        4.8 Titles and Subtitles. The titles of the paragraphs and subparagraphs
of this Agreement are for convenience of reference only and are not to be
considered in construing this Agreement.

        4.9 Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

        4.10 Subsequent Closings. In the event that the Company shall conduct
subsequent sales of Series D Preferred Stock, any holder of such shares of
Series D Preferred Stock shall be deemed an Investor with all of the rights of
an Investor under this Agreement; provided that as a

                                      -20-
<PAGE>   21
condition thereto such Investor and the Company shall sign a counterpart
signature page to this Agreement.

        4.11 Assignment. The Investor's rights hereunder, and the rights of any
of the Investors permitted assigns, may only be assigned to a party who acquires
an aggregate at least 80,000 shares of Preferred Stock - or such lesser amount
if it represents the Investor's entire holdings; provided, however, that no
party may be assigned any of the foregoing rights unless Company is given
written notice by the assigning party at the time of such assignment stating the
name and address of the assignee and identifying the securities of Company as to
which the rights in question are being assigned; and provided further that any
such assignee will receive such assigned rights subject to all the terms and
conditions of this Agreement, including without limitation the provisions of
this Section 4. Assignment of the Investor's right hereunder to an affiliate (as
defined in the Securities Act) a partner, retired partner, spouse, lineal
descendent, ancestor or shareholder of any Investor will be without restriction
as to minimum shareholdings.

                     [REMAINDER OF PAGE INTENTIONALLY BLANK]

                                      -21-
<PAGE>   22
        IN WITNESS WHEREOF, the parties hereto have executed this Investors'
Rights Agreement effective as of the day and year first above written.

                                      WEBEX, INC.

                                      By         /s/ Subrah S. Iyar
                                          --------------------------------------
                                                     Subrah S. Iyar
                                                 Chief Executive Officer

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   23
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Antenna Venture Partners
                                     -------------------------------------------
                                             Print Name of Investor

                                     By    /s/ C. Daisy Pravo
                                         ---------------------------------------
                                                      Signature

                                     Address:  301 Howard  #1440
                                               ---------------------------------
                                               San Francisco, CA  94105
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   24

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Arno Penzias
                                     -------------------------------------------
                                               Print Name of Investor

                                     By  /s/  Arno Penzias
                                         ---------------------------------------
                                                       Signature

                                     Address:  ARNO PENZIAS
                                               ---------------------------------
                                               1960 GRANT AVE., #16
                                               ---------------------------------
                                               SAN FRANCISCO, CA  94133
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   25

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Craig Klosterman
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Craig Klosterman
                                           -------------------------------------
                                                        Signature

                                     Address:  20781 Via Corta
                                               ---------------------------------
                                               San Jose, CA  95120
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   26

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     GEOFFREY E. BOCK
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Geoffrey E. Bock
                                           -------------------------------------
                                                        Signature

                                     Address:  181 Gibbs St.
                                               ---------------------------------
                                               Newton, MA
                                               ---------------------------------
                                               02454
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   27

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     GEORGE B. BOLTON
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ George Brown Bolton
                                           -------------------------------------
                                                       Signature

                                     Address:  2655 Scott St.
                                               ---------------------------------
                                               San Francisco, CA
                                               ---------------------------------
                                               94123
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   28

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     GC DEV. CO., INC.
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/
                                           -------------------------------------
                                                        Signature

                                     Address:  360 NORTH CRESCENT DRIVE
                                               ---------------------------------
                                               BEVERLY HILLS, CA  90210
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   29

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     HIKARI TSUSHIN, INC.
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Masabide Saito, Managing Director
                                           -------------------------------------
                                                       Signature

                                     Address:  23F Ohtemachi Nemura Bldg.
                                               ---------------------------------
                                               2-1-1 Ohterrachi, Chiyoda-Ka
                                               ---------------------------------
                                               TOKYO  100-0004    JAPAN
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   30

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     JEFFREY LIU
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/  Jeffrey Liu
                                           -------------------------------------
                                                        Signature

                                     Address:  924 Clayton St.
                                               ---------------------------------
                                               SAN FRAN, CA  94117
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   31

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Larry Smarr
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/  Larry Smarr
                                           -------------------------------------
                                                        Signature

                                     Address:  501 W. Pennsylvania
                                               ---------------------------------
                                               Urbana, IL  61801
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   32

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     North America Venture Fund, L.P.
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/
                                           -------------------------------------
                                                      Signature

                                     Address:  3945 Freedom Circle
                                               ---------------------------------
                                               Suite 270
                                               ---------------------------------
                                               Santa Clara, CA  95054
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   33

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Peter B. Breck
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Peter B. Breck
                                           -------------------------------------
                                                                    Signature

                                     Address:  PETER B. BRECK
                                               ---------------------------------
                                               Deutsche Banc Alex. Brown
                                               ---------------------------------
                                               101 California Street, 48th Floor
                                               ---------------------------------
                                               San Francisco, CA  94111
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   34

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Peter S. Kastner
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Peter S. Kastner
                                           -------------------------------------
                                                       Signature

                                     Address:  8 Lincoln Circle
                                               ---------------------------------
                                               Wellesley, MA  02481
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   35

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     PTEK Holdings, Inc.
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/
                                           -------------------------------------
                                                                    Signature

                                     Address:
                                               ---------------------------------
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   36

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Stephen D. Hendrick
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Stephen D. Hendrick
                                           -------------------------------------
                                                       Signature

                                     Address:  7 Whistler Lane
                                               ---------------------------------
                                               Southborough, MA  01772
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   37

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Broadview SLP
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/
                                           -------------------------------------
                                                         Signature

                                     Address:  One Bridge Plaza
                                               ---------------------------------
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   38

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     TIBCO SOFTWARE INC.
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Robert P. Stefanski
                                           -------------------------------------
                                                       Signature
                                               ROBERT P. STEFANSKI
                                               EXECUTIVE VICE PRESIDENT
                                               TIBCO SOFTWARE INC.

                                     Address:  3165 Porter Drive
                                               ---------------------------------
                                               Palo Alto, CA  94304
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   39

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Dr. Thomas W. Kuhr
                                     Managing Director
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Dr. Thomas W. Kuhr
                                           -------------------------------------
                                                        Signature

                                     Address:  1. T-Telematik Venture
                                               ---------------------------------
                                               Beteiligungsgesellschatt mbH
                                               ---------------------------------
                                               Godesberger Allee 73
                                               ---------------------------------
                                               53175 Bonn
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   40

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     Ardara Us Direct Investment Inc.
                                     -------------------------------------------
                                              Print Name of Investor

                                               DUCAT LIMITED
                                               two DIRECTORS:

                                     By    /s/
                                           -------------------------------------
                                                         Signature

                                     Address:  11 rue de la Corraterie
                                               ---------------------------------
                                               1204 Geneva, Switzerland
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   41

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     FRANCIS A. DeSOUZA
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Francis A. DeSouza
                                           -------------------------------------
                                                       Signature

                                     Address:  108 2ND AVE SOUTH, #205
                                               ---------------------------------
                                               KIRKLAND, WA  98033
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   42

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     FRANK L. WALTERS
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Frank L. Walters
                                           -------------------------------------
                                                                    Signature

                                     Address:  2400 Sand Hill Rd #202
                                               ---------------------------------
                                               Menlo Park
                                               ---------------------------------
                                               CA  94027
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   43

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Nitin T. Mehta
                                           -------------------------------------
                                                        Signature

                                     Address:
                                               ---------------------------------
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   44

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     I C P, LLC
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/
                                           -------------------------------------
                                                          Signature

                                     Address:
                                               ---------------------------------
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   45

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     James A. Moore
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ James A. Moore
                                           -------------------------------------
                                                        Signature

                                     Address:  2355 Vallejo St.
                                               ---------------------------------
                                               SF, CA  94123
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   46

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000
                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     JAY MORRISON
                                     -------------------------------------------
                                              Print Name of Investor

                                     By    /s/ Jay Morrison
                                           -------------------------------------
                                                        Signature

                                     Address:  460 Dalewood Dr.
                                               ---------------------------------
                                               Orinda, CA  94563
                                               ---------------------------------
                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   47
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                      Leo Richard Jolicoeur and Cynthia Anne
                                      Jolicoeur, Trustees of the Jolicoeur
                                      Family Trust, June 16, 1999
                                      ------------------------------------------
                                      Print Name of Investor

                                      By    /s/ Leo Jolicoeur
                                        ----------------------------------------
                                                        Signature

                                      Address:  12220 Menalto Dr.
                                              ----------------------------------
                                                Los Altos Hills, CA  94022
                                              ----------------------------------

                                              ----------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   48

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            MARK THOMPSON
                                            ------------------------------------
                                                  Print Name of Investor

                                            By /s/ Mark Thompson
                                              ----------------------------------
                                                        Signature

                                            Address:  One Spring Lane
                                                    ----------------------------

                                                    ----------------------------
                                                      Tiburon, CA  94720
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   49

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                        NEA Presidents Fund, L.P.
                                        By: NEA General Partners, L.P.
                                        By:  General Partner
                                        ----------------------------------------
                                                 Print Name of Investor

                                     By    /s/ Thomas C. McConnell
                                        ----------------------------------------
                                                      Signature

                                     Address:  2490 Sand Hill Road
                                             -----------------------------------
                                               Menlo Park, CA  94025
                                             -----------------------------------

                                             -----------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   50

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                         NEA Ventures 1999, Limited Partnership
                                         By: Vice President
                                         ---------------------------------------
                                                 Print Name of Investor

                                      By  /s/ Susie Greathouse
                                         ---------------------------------------
                                                        Signature

                                      Address:  2490 Sand Hill Road
                                              ----------------------------------
                                                Menlo Park, CA  94025
                                              ----------------------------------

                                              ----------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   51

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            Net2Phone, Inc.
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Kan Slasky C.F.O.
                                               ---------------------------------
                                                           Signature

                                            Address:  171 MAIN ST
                                                    ----------------------------
                                                      HACKENSACK, NJ  07601
                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   52

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                      NEW ENTERPRISE ASSOCIATES VIII, LIMITED
                                      PARTNERSHIP
                                      By: NEA Partners VIII, Limited Partnership
                                          Its General Partner
                                      ------------------------------------------
                                               Print Name of Investor

                                   By  /s/ Thomas C. McConnell
                                      ------------------------------------------
                                                     Signature

                                   Address:  2490 Sand Hill Road
                                           -------------------------------------
                                             Menlo Park, CA  94025
                                           -------------------------------------

                                           -------------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   53

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            ORACLE CORPORATION
                                            ------------------------------------
                                                    Print Name of Investor

                                            By  /s/
                                              ----------------------------------
                                                            Signature

                                            Address:  Oracle Corporation
                                                    ----------------------------
                                                      500 Oracle Parkway
                                                    ----------------------------
                                                      Redwood Shores, CA  94065
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   54

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                   Pacven Walden Ventures IV
                                   Associates Fund, L.P.
                                   ---------------------------------------------
                                             Print Name of Investor

                                   By  /s/
                                     -------------------------------------------
                                                      Signature

                                          Director of Pacven Walden
                                          Management Co., Ltd.
                                          as General Partner of Pacven Walden
                                          Management II, L.P. as General
                                          Partner of Pacven Walden Ventures
                                          IV Associates Fund, L.P.

                                   Address:  750 Battery Street, Ste. 700
                                           -------------------------------------
                                             San Francisco, CA  94111
                                           -------------------------------------

                                           -------------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   55

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                   Pacven Walden Ventures IV, L.P.
                                   ---------------------------------------------
                                              Print Name of Investor

                                   By /s/
                                      ------------------------------------------
                                                      Signature

                                          Director of Pacven Walden
                                          Management Co., Ltd.
                                          as General Partner of Pacven Walden
                                          Management II, L.P. as General Partner
                                          of Pacven Walden Ventures IV, L.P.

                                   Address:  750 Battery Street, Ste. 700
                                           -------------------------------------
                                             San Francisco, CA  94111
                                           -------------------------------------

                                           -------------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   56

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            PHILLIP WHITE
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Phillip White
                                               ---------------------------------
                                                           Signature

                                            Address:  95 ATHERTON AVE
                                                    ----------------------------

                                                    ----------------------------
                                                      ATHERTON, CA 94021
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   57

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            Scott Sandell
                                            ------------------------------------
                                                   Print Name of Investor

                                            By /s/ Scott Sandell
                                              ----------------------------------
                                                          Signature

                                            Address:  c/o NEA
                                                    ----------------------------
                                                      2490 Sand Hill
                                                    ----------------------------
                                                      Menlo Park, CA  94025
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   58

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            SPRINGVEST CORPORATION
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Min fu Chang
                                              ----------------------------------
                                                          Signature
                                                   MIN FU CHANG

                                            Address:  301-1, MIN SHENG WEST ROAD
                                                    ----------------------------
                                                      TAIPEI 103, TAIWAN R.O.C.
                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   59

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            STEWART H. SONNENFELDT
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Stewart H. Sonnenfeldt
                                              ----------------------------------
                                                          Signature

                                            Address:
                                                    ----------------------------

                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   60

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            Summit (SAF) Investors IV, L.P.
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/
                                              ----------------------------------
                                                          Signature

                                            Address:  Summit Accelerator Fund
                                                    ----------------------------
                                                      499 Hamilton Ave., #200
                                                    ----------------------------
                                                      Palo Alto, CA  94301
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   61

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                         Summit Accelerator Founders Fund, L.P.
                                         ---------------------------------------
                                                 Print Name of Investor

                                         By  /s/
                                           -------------------------------------
                                                          Signature

                                         Address:  Summit Accelerator Fund
                                                 -------------------------------
                                                   499 Hamilton Ave., #200
                                                 -------------------------------
                                                   Palo Alto, CA  94301
                                                 -------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   62

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                                 Summit Accelerator Fund L.P.
                                              ----------------------------------
                                                     Print Name of Investor

                                            By  /s/
                                              ----------------------------------
                                                           Signature

                                            Address:  Summit Accelerator Fund
                                                    ----------------------------
                                                      499 Hamilton Ave., #200
                                                    ----------------------------
                                                      Palo Alto, CA  94301
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   63

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            THOMAS L. HERSHNER
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Thomas L. Hershner
                                              ----------------------------------
                                                           Signature

                                            Address:  700 KING'S MOUNTAIN ROAD
                                                    ----------------------------
                                                      WOODSIDE, CA  94062
                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   64

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            TSUNAMI INVESTMENTS LLC
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/
                                              ----------------------------------
                                                         Signature

                                            Address:  940 LA MESA DRIVE
                                                    ----------------------------
                                                      PORTOLA VALLEY, CA
                                                    ----------------------------
                                                      94028
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   65

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            VANENBURG GROUP B.V.
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ W.H. Heijting
                                              ----------------------------------
                                                         Signature

                                            Address:  VANENBURGER ALLEE 13
                                                    ----------------------------
                                                      P.O. BOX 231
                                                    ----------------------------
                                                      BSSO DE PUTTEW
                                                    ----------------------------
                                                      THE NETHERLANDS
                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   66

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                       Walden EDB Partners II, L.P.
                                       -----------------------------------------
                                                Print Name of Investor

                                       By  /s/
                                         ---------------------------------------
                                                      Signature
                                              General Partner

                                       Address:  750 Battery Street, Ste. 700
                                               ---------------------------------
                                                 San Francisco, CA  94111
                                               ---------------------------------

                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   67

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                     WIIG-TDF Partners LLC
                                     -------------------------------------------
                                              Print Name of Investor

                                     By  /s/
                                       -----------------------------------------
                                                       Signature
                                           Director of WIIG Management Co., Ltd.
                                           for and behalf of the Fund Managers

                                     Address:  750 Battery Street, Ste. 700
                                             -----------------------------------
                                               San Francisco, CA  94111
                                             -----------------------------------

                                             -----------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   68

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            William B. Ayer
                                            ------------------------------------
                                                    Print Name of Investor

                                            By  /s/ William B. Ayer
                                              ----------------------------------
                                                         Signature

                                            Address:  285 Oak St. / PO Box 1445
                                                    ----------------------------
                                                      White Salmon, WA  98672
                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   69

                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            SUBRAH S. IYAR
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Subrah S. Iyar
                                            ------------------------------------
                                                        Signature

                                            Address:  3205 HANCOCK PL
                                                    ----------------------------
                                                      FREMONT, CA  94530
                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   70
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

         The undersigned hereby executes and delivers the WebEx, Inc. Amended
and Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                       Yuqing Xu
                                       -----------------------------------------
                                                Print Name of Investor

                                       By /s/ YUQING XU
                                         ---------------------------------------
                                                      Signature

                                       Address:  24920 La Loma Ct.
                                               ---------------------------------
                                                 Los Altos Hills, CA 94022
                                               ---------------------------------

                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   71
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

         The undersigned hereby executes and delivers the WebEx, Inc. Amended
and Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                       Min Zhu
                                       -----------------------------------------
                                                Print Name of Investor

                                       By /s/ MIN ZHU
                                         ---------------------------------------
                                                      Signature

                                       Address:  24920 La Loma Ct.
                                               ---------------------------------
                                                 Los Altos Hills, CA 94022
                                               ---------------------------------

                                               ---------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT
<PAGE>   72
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            REUTERS HOLDINGS SWITZERLAND SA
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/
                                            ------------------------------------
                                                        Signature

                                            Address: 153 Route de Thonon
                                                    ----------------------------
                                                     1245 Collogne - Bellerive
                                                    ----------------------------
                                                     Switzerland
                                                    ----------------------------

                                            Copies of all notices should be
                                            sent to:

                                            Reuters Limited
                                            85 Fleet Street
                                            London EC4P 4AJ
                                            United Kingdom

                                            Attention: General Counsel

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   73
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

        The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                            Yahoo! Inc.
                                            ------------------------------------
                                                   Print Name of Investor

                                            By  /s/ Ellen Siminoff
                                            ------------------------------------
                                                        Signature
                                                Ellen Siminoff

                                            Address:
                                                    ----------------------------

                                                    ----------------------------

                                                    ----------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT

<PAGE>   74
                                SIGNATURE PAGE TO

                 AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT

                          DATED AS OF MARCH ___ , 2000

                                  BY AND AMONG

                                   WEBEX, INC.

                          AND EACH HOLDER NAMED THEREIN

     The undersigned hereby executes and delivers the WebEx, Inc. Amended and
Restated Investor Rights 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 Holders named in such Agreement, shall constitute one and the
same document in accordance with the terms of such Agreement.

                                       Dr. Thomas W. Kuhr
                                       Managing Director
                                       -----------------------------------------
                                              Print Name of Investor

                                       By /s/ Dr. Thomas W. Kuhr
                                          --------------------------------------
                                                    Signature

                                       Address: 2. Dr. Kuhr & Partners GbR
                                                --------------------------------
                                                Godesberger Allee 73
                                                --------------------------------
                                                53175 Bonn
                                                --------------------------------

       SIGNATURE PAGE TO AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT
<PAGE>   75
                                   SCHEDULE A

<TABLE>
<CAPTION>
Founders                                                Number of Shares
--------                                                ----------------
<S>                                                     <C>
Subrah Iyar                                             5,000,000 Common
c/o WebEx, Inc.
110 Rose Orchard Way
San Jose, CA 95134
Fax: (408) 435-7004

Min Zhu and Yuqing Xu                                   5,000,000 Common
c/o WebEx, Inc.
110 Rose Orchard Way
San Jose, CA 95134
Fax: (408) 435-7004
</TABLE>

<TABLE>
<CAPTION>
Investors                                                Number of Shares
---------                                                ----------------
<S>                                                      <C>
Baan Investments                                           904,474 Series A Preferred
___________________                                      4,598,383 Series B Preferred
___________________

New Enterprise Associates                                2,333,333 Series C Preferred
___________________
___________________

T-Telematik Venture Beteiligungsgesellschaft MBH         1,436,667 Series C Preferred
___________________
___________________

Walden Ventures                                          1,333,333 Series C Preferred
Attn:  Lip-Bu Tan
___________________
___________________

Vanenburg Group, B.V.                                    1,000,000 Series C Preferred
___________________
___________________

International Capital Partners, LLC                        550,000 Series C Preferred
Attn:  Mr. Nicholas Sinacori
300 First Stamford Place
Stamford, CT 06902

Oracle                                                     333,333 Series C Preferred
___________________
___________________
</TABLE>

<PAGE>   76

<TABLE>
<CAPTION>
Investors                                                Number of Shares
---------                                                ----------------
<S>                                                      <C>
SAP                                                        333,333 Series C Preferred
___________________
___________________

Summit Accelerator Fund, L.P.                              333,333 Series C Preferred
___________________
___________________

Net2Phone                                                  240,000 Series C Preferred
___________________
___________________

[Others]                                                   455,930 Series C Preferred
___________________
___________________
</TABLE>

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