Document:

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                                                                   Exhibit 10.35

                             STOCKHOLDERS AGREEMENT

                                  By and Among

                               WebSideStory, Inc.

                   The Founding Stockholders as defined herein

                                       and

                                  The Investors
                                as defined herein

                            Dated as of June 18,1999

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                             STOCKHOLDERS AGREEMENT

     THIS STOCKHOLDERS AGREEMENT (this "Agreement") is made as of this 18th day
of June, 1999 by and among WebSideStory, Inc., a California corporation (the
"Company"), the stockholders of the Company identified as such on the signature
pages hereto (the "Founding Stockholders"), the persons identified on the
signature pages hereto as the investors (each, an "Investor" and collectively,
the "Investors"), and any other stockholder or optionholder who from time to
time becomes party to this Agreement by execution of a Joinder Agreement in
substantially the form attached hereto as Exhibit A (the "Other Stockholders").
The Founding Stockholders and the Other Stockholders are herein referred to
collectively as the "Stockholders" and individually as a "Stockholder."

     WHEREAS, reference is made to the Stock Purchase Agreement, dated as of the
date hereof (the "Purchase Agreement"), pursuant to which the Investors have
agreed to purchase shares of Convertible Redeemable Participating Preferred
Stock of the Company (the "Convertible Preferred Stock") and shares of
Redeemable Preferred Stock (the "Redeemable Preferred Stock");

     WHEREAS, the Convertible Preferred Stock is convertible into shares of
Common Stock of the Company ("Common Stock");

     WHEREAS, the execution and delivery of this Agreement is a condition
precedent to the transactions contemplated by the Purchase Agreement; and

     WHEREAS, the parties hereto desire to agree upon the terms upon which the
outstanding securities of the Company, now or hereafter outstanding and held by
them will be held, transferred and voted.

     NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements hereinafter set forth, the parties hereto agree as follows:

                                   ARTICLE I

                                   DEFINITIONS

     Section 1.1 Construction of Terms. As used herein, the masculine, feminine
or neuter gender, and the singular or plural number, shall be deemed to be or to
include the other genders or number, as the case may be, whenever the context so
indicates or requires.

     Section 1.2 Terms Not Defined. Capitalized terms used herein and not
otherwise defined shall have the meanings ascribed to them in the Purchase
Agreement.

     Section 1.3 Number of Shares of Stock. Whenever any provision of this
Agreement calls for any calculation based on a number of shares of capital stock
held by a Stockholder or an Investor, the number of shares deemed to be held by
that Stockholder or Investor shall be the total number of shares of Common Stock
then owned by the Stockholder or Investor, plus the total number of shares of
Common Stock issuable upon the conversion of any Preferred Stock or

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other convertible securities or the exercise of any vested options, warrants or
subscription rights then owned by such Stockholder or Investor.

     Section 1.4 Defined Terms. The following capitalized terms, as used in this
Agreement, shall have the meanings set forth below.

     An "Affiliate" of any Person means a Person that directly or indirectly,
through one or more intermediaries, controls, is controlled by or is under
common control with the first mentioned Person. A Person shall be deemed to
control another Person if such first Person possesses directly or indirectly the
power to direct, or cause the direction of, the management and policies of the
second Person, whether through the ownership of voting securities, by contract
or otherwise.

     "Board of Directors" means the Board of Directors of the Company.

     "Common Stock" means the Common Stock and any other common equity
securities issued by the Company, and any other shares of stock issued or
issuable with respect thereto (whether by way of a stock dividend or stock split
or in exchange for or upon conversion of such shares or otherwise in connection
with a combination of shares, recapitalization, merger, consolidation or other
corporate reorganization).

     "Company" shall refer to the Company and any successor or successors
thereto.

     "Majority Interest" means the Investors holding not less than a majority of
the outstanding Shares held by all of the Investors.

     "Person" means an individual, a corporation, an association, a partnership,
a limited liability company, an estate, a trust, and any other entity or
organization, governmental or otherwise.

     "Preferred Stock" means the Convertible Preferred Stock, together with any
shares issued or issuable with respect thereto (whether by way of a stock
dividend or stock split or in exchange for or in replacement of such shares or
otherwise in connection with a combination of shares, recapitalization, merger,
consolidation or other corporate reorganization).

     "Qualified Public Offering" has the meaning set forth in the Company's
Amended and Restated Articles of Incorporation in effect as of the date hereof.

     "Shares" means (i) with respect to the Investors, the shares of Common
Stock subject to acquisition upon the conversion of the Preferred Stock at the
relevant time (such number being subject to possible adjustment in accordance
with the terms of the Company's Amended and Restated Articles of Incorporation),
together with the shares of Common Stock held by the Investors at the relevant
time if conversion of any of the Preferred Stock has then occurred, and (ii)
with respect to the Stockholders or any Permitted Transferees (as defined in
Section 2.1(b) below) thereof, all shares of Common Stock then held by the
Stockholders and any Permitted Transferees thereof.

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     "Transfer" means any direct or indirect transfer, donation, sale,
assignment, pledge, hypothecation, grant of a security interest in or other
disposal or attempted disposal of all or any portion of a security or of any
rights. "Transferred" means the accomplishment of a transfer, and "transferee"
means the recipient of a transfer.

                                   ARTICLE II

                RESTRICTIONS ON TRANSFER; RIGHT OF LAST REFUSAL;
                               CO-SALE PROVISIONS

     Notwithstanding anything herein to the contrary, the following provisions
of this Article II shall terminate immediately prior to the closing of a
Qualified Public Offering and shall not apply with respect to any Qualified
Public Offering.

     Section 2.1 Restrictions on Transfer. Each Stockholder agrees that he will
not, without the prior written consent of a Majority Interest of the Investors,
transfer all or any portion of the Shares now owned or hereafter acquired by
him, except in connection with, and in compliance with the conditions of, any of
the following:

         (a) Transfers effected pursuant to Sections 2.2 and 2.3 in each case
made in accordance with the procedures set forth therein;

         (b) Transfers by any Stockholder to his spouse or children or to a
trust of which he is the settlor and a trustee for the benefit of his spouse or
children; provided, that any such trust or entity does not require or permit
distribution of such Shares during the term of this Agreement; and provided
further, that the transferee shall have entered into a Joinder Agreement in the
form attached as Exhibit A providing that all Shares so transferred shall
continue to be subject to all provisions of this Agreement as if such Shares
were still held by such Stockholder, except that no further transfer shall
thereafter be permitted hereunder except in compliance with Sections 2.2 and
2.3;

         (c) Transfers upon the death of any Stockholder to his heirs, executors
or administrators or to a trust under his will or Transfers between such
Stockholder and his guardian or conservator, provided that the transferee shall
have entered into a Joinder Agreement in the form attached as Exhibit A
providing that all Shares so transferred shall continue to be subject to all
provisions of this Agreement as if such Shares were still held by such
Stockholder, except that no further transfer shall thereafter be permitted
hereunder except in compliance with Sections 2.2 and 2.3; and

         (d) in addition to the Transfers specified in items (a), (b) and (c)
above, Transfers by Blaise Barrelet and/or Agnes Barrelet of Ten Million
(10,000,000) shares of Common Stock in the aggregate, and Transfers by Michael
Christian of Five Hundred Twenty-Five Thousand Four Hundred Fifty-Four (525,454)
shares of Common Stock in the aggregate, in each case as appropriately adjusted
for any stock split, combination, reorganization, recapitalization,
reclassification, stock distribution, stock dividend or similar event.

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     Any permitted transferee described in clauses (b) or (c) above shall be
referred to herein as a "Permitted Transferee." Anything to the contrary in this
Agreement notwithstanding, Permitted Transferees shall take any Shares so
transferred subject to all provisions of this Agreement as if such Shares were
still held by the transferring Stockholder, whether or not they so agree in
writing.

     Section 2.2 Right of Last Refusal. In the event that any of the
Stockholders, including any of their Permitted Transferees, receives a bona fide
offer to purchase all or any portion of the Shares held by such person (a
"Transaction Offer") from a non-Affiliate (the "Offeror"), such Stockholders or
Permitted Transferees (a "Transferring Stockholder") may, subject to the
provisions of Section 2.3 hereof, transfer such Shares pursuant to and in
accordance with the following provisions of this Section 2.2:

         (a) Such Transferring Stockholder shall cause the Transaction Offer and
all of the terms thereof to be reduced to writing and shall notify each of the
Investors of his wish to accept the Transaction Offer and otherwise comply with
the provisions of this Section 2.2 and, if applicable, Section 2.3 (such notice,
the "Offer Notice"). The Transferring Stockholder's Offer Notice shall
constitute an irrevocable offer to sell the Shares which are the subject of the
Transaction Offer to the Investors, on the basis described below at a purchase
price equal to the price contained in, and on the same terms and conditions of,
the Transaction Offer. The Offer Notice shall be accompanied by a true copy of
the Transaction Offer (which shall identify the Offeror and all relevant
information in connection therewith).

         (b) Upon receipt of an Offer Notice, the Investors may elect to accept
the offer to sell with respect to all of the Shares subject thereto and shall
give written notice of such election to the Transferring Stockholder as provided
below. Each Investor shall have the right to offer to purchase up to that number
of Shares covered by the Transaction Offer as shall be equal to the product
obtained by multiplying (i) the total number of Shares subject to the
Transaction Offer by (ii) a fraction, the numerator of which is the total number
of Shares owned by such Investor on the date of the Offer Notice on an as
converted basis (including for this purpose any shares of Common Stock issuable
upon conversion of the Preferred Stock), and the denominator of which is the
total number of Shares then held by all Investors on the date of the Offer
Notice also on an as converted basis, subject to increase as hereinafter
provided. The number of Shares that each Investor is entitled to purchase under
this Section 2.2 as provided in the immediately preceding sentence shall be
referred to as its "Pro Rata Fraction." In the event an Investor does not wish
to purchase its Pro Rata Fraction, then any Investors who so elect to purchase
shall have the right to offer to purchase, on a pro rata basis with any other
Investors who so elect, any Pro Rata Fraction not purchased by such Investor.

     Each Investor shall have the right to accept the Transaction Offer by
giving notice of such acceptance to the Transferring Stockholder as provided
herein within thirty (30) calendar days after receipt of the Offer Notice (the
"Election Period"), which notice shall indicate the maximum number of Shares
subject thereto which the Investor is willing to purchase in the event fewer
than all Investors elect to purchase their Pro Rata Fractions. In the event that
the price set forth in the Offer Notice is stated in consideration other than
cash or cash equivalents, the Transferring Stockholder and a Majority Interest
of the Investors shall determine the fair market

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value of such consideration, reasonably and in good faith; provided that, if the
Transferring Stockholder and such Investors are unable to agree on the fair
market value of such consideration, then the fair market value of such
consideration shall be the average of three appraisals conducted by three
independent investment bankers, such that (i) the Transferring Stockholder shall
select and pay the fees of the first investment banker, (ii) such Investors
shall select and pay the fees of the second investment banker and (iii) the
first two investment bankers selected shall select a third investment banker,
the fees of which shall be paid equally by the Transferring Stockholder, on the
one hand, and such Investors, on the other hand. The Investors may exercise
their right to purchase under this Section 2.2 by payment of such fair market
value in cash or cash equivalents. The Transferring Stockholder shall notify the
Investors promptly following any lapse of the rights to purchase under this
Section 2.2 without acceptance thereof or any rejection of such rights.

     Upon the expiration of the Election Period, the number of Shares to be
purchased by each Investor (and if applicable by the Company or its assignees)
shall be determined as follows: (x) there shall first be allocated to each
Investor a number of Shares equal to the lesser of (A) the number of Shares as
to which such Investor accepted the Transaction Offer or (B) such Investor's Pro
Rata Fraction, and (y) second, the balance, if any, not allocated under clause
(x) above, shall be allocated to those Investors who accepted the Transaction
Offer as to a number of Shares which exceeded their respective Pro Rata
Fractions, in each case on a pro rata basis in proportion to the amount of such
excess. The closing for any purchase of Shares by the Investors under this
Section 2.2 shall take place within twenty-one (21) calendar days after the
expiration of the Election Period at the place and on the date specified by a
Majority Interest of the Investors (as to purchases by the Investors).

         (c) In the event that the Investors do not elect to exercise the rights
to purchase under this Section 2.2 with respect to all of the Shares proposed to
be sold, the Transferring Stockholder may sell any such unsold Shares to the
Offeror on the terms and conditions set forth in the Offer Notice, subject to
the provisions of Section 2.3. If the Transferring Stockholder's sale to an
Offeror is not consummated in accordance with the terms of the Transaction Offer
within the later of (i) ninety (90) calendar days after the expiration of the
right of last refusal under this Section 2.2 and the Co-Sale Option set forth in
Section 2.3 below, if applicable, and (ii) the satisfaction of all governmental
approval or filing requirements, the Transaction Offer shall be deemed to lapse,
and any transfers of Shares pursuant to such Transaction Offer shall be deemed
to be in violation of the provisions of this Agreement unless the Investors and
the Company are once again afforded the right of last refusal provided for
herein with respect to such Transaction Offer.

     Section 2.3 Co-Sale Option of Investors. In the event that any Transferring
Stockholder receives a Transaction Offer from an Offeror, and the right to
purchase under Section 2.2 is not exercised by the Investors as to all Shares,
such Transferring Stockholder may transfer any such unsold Shares only pursuant
to and in accordance with the following provisions of this Section 2.3:

         (a) Each of the Investors shall have the right to participate in the
Transaction Offer with respect to any Shares subject thereto which are not
purchased pursuant to

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Section 2.2 by giving written notice (the "Acceptance Notice") to the
Transferring Stockholder on or before the last day of the Election Period (the
"Co-Sale Option"). Each Acceptance Notice shall indicate the maximum number of
Shares the Investor wishes to sell including the number of Shares it would sell
if one or more other Investors do not elect to participate in the sale on the
terms and conditions stated in the Offer Notice. Any Investor holding Preferred
Stock shall be permitted to sell to the relevant Offeror in connection with any
exercise of the Co-Sale Option, at its option, shares of Common Stock acquired
upon conversion of such Preferred Stock, or an option to acquire such Common
Stock when it receives the same upon such conversion at the election of such
Investor with the same effect as if Common Stock were being conveyed.

         (b) Each Investor shall have the right to sell a portion of its Shares
pursuant to the Transaction Offer which is equal to or less than the product
obtained by multiplying (i) the total number of Shares subject to the
Transaction Offer and available for sale to the Offeror by (ii) a fraction, the
numerator of which is the total number of Shares owned by such Investor on the
date of the Offer Notice on an as converted basis (including all shares of
Common Stock issuable upon conversion of the Preferred Stock) and the
denominator of which is the total number of Shares then held by all Investors
and the Transferring Stockholder (including any of his Permitted Transferees) on
the date of the Offer Notice, also on an as converted basis and including
(without duplication) all shares of Common Stock issuable upon the conversion of
the Preferred Stock. To the extent one or more Investors elect not to sell, or
fail to exercise their rights to sell, the full amount of such Shares which they
are entitled to sell pursuant to this Section 2.3, the right of Investors who
have elected to sell Shares shall be increased proportionately based on their
relative holdings and such other Investors shall have an additional five (5)
business days from the date upon which they are notified of such election or
failure to exercise in which to increase the number of Shares to be sold by them
hereunder.

         (c) Within ten (10) calendar days after the date by which the Investors
were first required to notify the Transferring Stockholder of their intent to
participate, the Transferring Stockholder shall notify the Company, which in
turn shall promptly notify each participating Investor of the number of Shares
held by such Investor that will be included in the sale and the date on which
the Transaction Offer will be consummated, which shall be no later than the
later of (i) thirty (30) calendar days after the date by which the Investors
were required to notify the Transferring Stockholder of their intent to
participate and (ii) the satisfaction of any governmental approval or filing
requirements, if any.

         (d) Each participating Investor may effect its participation in any
Transaction Offer hereunder by delivery to the Offeror, or to the Transferring
Stockholder for delivery to the Offeror, of one or more instruments or
certificates, properly endorsed for transfer, representing the Shares it elects
to sell therein. At the time of consummation of the Transaction Offer, the
Offeror shall remit directly to each relevant Investor that portion of the sale
proceeds to which the relevant Investor is entitled by reason of its
participation therein (less any adjustments due to the conversion of any
convertible securities or the exercise of any exercisable securities). No Shares
may be purchased by the Offeror from the Transferring Stockholders or any of
their Permitted Transferees unless the Offeror simultaneously purchases from the
participating Investors all of the Shares that they have elected to sell
pursuant to this Section 2.3.

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         (e) Any Shares held by a Transferring Stockholder which are the subject
of the Transaction Offer that the Transferring Stockholder desires to sell
following compliance with this Section 2.3 may be sold to the Offeror only
during the period specified in Section 2.2(c) and only on terms no more
favorable to the Transferring Stockholder than those contained in the Offer
Notice. Promptly after such sale, the Transferring Stockholder shall notify the
Company, which in turn shall promptly notify the Investors, of the consummation
thereof and shall furnish such evidence of the completion and time of completion
of such sale and of the terms thereof as may reasonably be requested by a
Majority Interest of the Investors. So long as the Offeror is neither a party
nor an Affiliate of or relative of a party, to this Agreement, such Offeror
shall take the Shares so transferred free and clear of any further restrictions
of this Article II. In the event that the Transaction Offer is not consummated
within the period required by this Section 2.3 or the Offeror fails timely to
remit to each participating Investor its portion of the sale proceeds, the
Transaction Offer shall be deemed to lapse, and any transfers of Shares pursuant
to such Transaction Offer shall be deemed to be in violation of the provisions
of this Agreement unless the Transferring Stockholder once again complies with
the provisions of Section 2.2 and this Section 2.3 hereof with respect to such
Transaction Offer.

     Section 2.4 Contemporaneous Transfers. If two or more Stockholders (or
their Permitted Transferees) propose concurrent transfers which are subject to
this Article II, then the relevant provisions of Sections 2.2 and 2.3, as
applicable, shall apply separately to each such proposed transfer.

     Section 2.5 Investor Transfer and Assignment. No Investor, without the
consent of the Company, shall have the right to Transfer any of its Shares to
any Person prior to the earlier to occur of (i) the second anniversary of the
Closing Date or (ii) the closing of a Qualified Public Offering, except to an
Affiliate of such Investor; provided that any such Transfer prior to a Qualified
Public Offering shall involve at least Two Million (2,000,000) of the Shares
initially purchased by such Investor pursuant to the Purchase Agreement (as
appropriately adjusted for any stock split, combination, reorganization,
recapitalization, reclassification, stock distribution, stock dividend or
similar event). Each Investor shall have the right to assign its rights to any
transferee of its Shares pursuant to this Section 2.5, and any such transferee
shall be deemed within the definition of an "Investor" for purposes of this
Article II and shall comply with the "market stand-off" obligations set forth in
Section 3 of the related Registration Rights Agreement of even date herewith. No
Investor shall Transfer any of its shares of Redeemable Preferred Stock, except
to the same transferee, and simultaneously with a permitted Transfer, of shares
of Preferred Stock on a proportional basis relative to such Investor's initial
holdings of Preferred Stock and Redeemable Preferred Stock.

     Section 2.6 Prohibited Transfers. If any transfer is made or attempted
contrary to the provisions of this Agreement, such purported transfer shall be
void ab initio; the Company and the other parties hereto shall have, in addition
to any other legal or equitable remedies which they may have, the right to
enforce the provisions of this Agreement by actions for specific performance (to
the extent permitted by law); and the Company shall have the right to refuse to
recognize any transferee as one of its Stockholders for any purpose.

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                                  ARTICLE III

                               RIGHTS TO PURCHASE

     Notwithstanding anything herein to the contrary, the following provisions
of this Article III shall terminate immediately prior to the closing of a
Qualified Public Offering and shall not apply with respect to any Qualified
Public Offering.

     Section 3.1 Right to Participate in Certain Sales of Additional Securities.
The Company agrees that it will not sell or issue (i) any shares of capital
stock of the Company, (ii) securities convertible into or exchangeable for
capital stock of the Company or (iii) options, warrants or rights carrying any
rights to purchase capital stock of the Company, unless the Company first
submits a written offer to each Investor (collectively, the "Offerees"),
identifying the terms of the proposed sale (including price, number or aggregate
principal amount of securities and all other material terms), and offers to each
Offeree the opportunity to purchase its Pro Rata Allotment (as hereinafter
defined) of the securities (subject to increase for over-allotment if some
Offerees do not fully exercise their rights) on terms and conditions, including
price, not less favorable than those on which the Company proposes to sell such
securities to a third party or parties. Each Offeree's "Pro Rata Allotment" of
such securities shall be based on the ratio (as determined in accordance with
Section 1.3 hereof) which the Shares then owned by it bears to all of the then
issued and outstanding shares of Common Stock (including for this purpose any
shares of Common Stock issuable upon conversion of the Preferred Stock) as of
the date of such written offer. The Company's offer pursuant to this Section 3.1
shall remain open and irrevocable for a period of thirty (30) calendar days, and
the recipients of such offer shall elect to purchase by giving written notice
thereof to the Company within such 30-day period, including therein the maximum
number of shares of capital stock or other securities of the Company which the
Offeree would purchase if other Offerees do not elect to purchase, with the
rights of electing Offerees to purchase such additional shares to be based upon
the relative holdings of Shares of the electing Offerees in the case of
over-subscription. Any securities so offered which are not purchased pursuant to
such offer may be sold by the Company, but only on the terms and conditions set
forth in the initial offer, at any time within 120 calendar days following the
termination of the above-referenced 30-day period but may not be sold to any
other person or on terms and conditions, including price, that are more
favorable to the purchaser than those set forth in such offer or after such
120-day period without renewed compliance with this Section 3.1.

     Notwithstanding the foregoing, the right to purchase granted under this
Article III shall be inapplicable with respect to any (i) of the Excluded Shares
(as defined in the Company's Amended and Restated Articles of Incorporation),
(ii) any shares of Common Stock underlying the option previously granted to
Michael Christian (as appropriately adjusted for any stock split, combination,
reorganization, recapitalization, reclassification, stock distribution, stock
dividend or similar event), (iii) securities issued as a result of any stock
split, stock dividend, reclassification or reorganization or similar event with
respect to the Common Stock, (iv) shares issued as consideration for any
acquisition approved by the Board of Directors, or (v) shares of Common Stock
issued upon conversion of the Preferred Stock.

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     Section 3.2 Assignment of Rights. Subject to Section 2.5, the rights of the
Offerees set forth in this Article III are transferable to any transferee of
Shares by Investors.

                                   ARTICLE IV

                              ELECTION OF DIRECTORS

     Section 4.1 Preferred Stock Designees. The parties acknowledge that the
terms of the Preferred Stock provide the holders thereof with certain rights to
elect two members of the Board of Directors, who shall initially be Benjamin H.
Ball and Walter G. Kortschak.

     Section 4.2 Board Composition. Each Investor and each Stockholder
(including, for purposes of this Section 4.2, each Permitted Transferee) agrees
to vote all of its shares of the capital stock of the Company having voting
power (and any other shares over which it exercises voting control), to the
extent it holds such shares of capital stock at the relevant time, in favor of:

         (a) the Board of Directors consisting of not less than five (5) nor
greater than nine (9) members in the aggregate; and

         (b) subject to the termination of the right of the holders of Preferred
Stock to elect directors as set forth in the last sentence of Section A.2.(a) of
Article III of the Company's Amended and Restated Articles of Incorporation, one
(1) individual nominated by TA Associates, Inc. on behalf of the Investors and
one (1) individual nominated by Summit Partners, L.P. on behalf of the
Investors; provided, however, that the right of each of TA Associates, Inc. and
Summit Partners, L.P. to nominate one (1) individual for election to the Board
of Directors shall terminate if either entity (together with its Affiliates)
holds of record less than Two Million (2,000,000) shares of Preferred Stock
(adjusted appropriately for stock splits, stock dividends, recapitalizations and
the like with respect to the Preferred Stock).

     Section 4.3 Removal; Vacancies. Each Investor and each Stockholder agrees
to vote all of his shares of the capital stock of the Company, having voting
power (and any other shares over which he exercises voting control), to the
extent it holds such voting stock at the relevant time, for the removal of any
director upon the request of the Persons then entitled to nominate such director
and for the election to the Board of Directors of a substitute designated by
such party in accordance with the provisions hereof. Each Investor and each
Stockholder further agrees to vote all of his shares of the capital stock of the
Company having voting power (and any other shares over which he or it exercises
voting control) in such manner as shall be necessary or appropriate to ensure
that any vacancy on the Board of Directors occurring for any reason shall be
filled only in accordance with the provisions of this Article IV.

     Section 4.4 Committees of the Board. Prior to the closing of a public
offering of shares of Common Stock or other equity securities of the Company,
the Company, the Investors and the Stockholders agree to cause the Board of
Directors to establish a Compensation Committee (which shall be charged with the
exclusive authority over all compensation matters with respect to the Company's
executive officers) and an Audit Committee (which shall be

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charged with reviewing the Company's financial statements and accounting
practices). The Compensation and Audit Committees shall act by majority
resolution of their members.

     Section 4.5 Assignment. Each Investor and Stockholder agrees, as a
condition to any transfer of its Shares, to cause the transferee to agree to the
provisions of this Article IV, whereupon such transferee shall be subject to the
provisions hereof to the same extent as the Investors and the Stockholders, as
applicable, in connection with its ownership of the Shares transferred for
purposes of this Article IV.

     Section 4.6 Term. This Article IV shall remain in effect until the earlier
of (a) closing of a Qualified Public Offering or (b) the date which is 10 years
after the date hereof.

                                   ARTICLE V

                                     VOTING

     Section 5.1 Voting. Each Investor agrees to vote its Shares in favor of a
Qualified Transaction (as defined below) upon receipt of a written request by a
majority of the outstanding Shares held by the Stockholders, and to take all
reasonably necessary action to effect such Qualified Transaction. Such
Stockholders shall have the right to compel such Investor to Transfer, and such
Investor hereby agrees to Transfer all of its Shares owned, directly or
indirectly, by such Investor, to effect such Qualified Transaction.

     Section 5.2 Qualified Transaction. A "Qualified Transaction" shall mean any
transaction pursuant to which the holders of Preferred Stock and Redeemable
Preferred Stock would receive in exchange for all shares of Preferred Stock
(including shares of Common Stock resulting from the conversion of Preferred
Stock) and Redeemable Preferred Stock then held by them an aggregate amount
equal to not less than $90 million with respect to such transaction that occurs
before the first anniversary of the date of this Agreement set forth above, or
thereafter, an aggregate amount equal to not less than $120 million; provided,
however, that in each case such aggregate amount thresholds shall be reduced by
any amounts previously paid by the Company pursuant to a redemption of any
Preferred Stock or Redeemable Preferred Stock.

     Section 5.3 Assignment. Each Investor agrees, as a condition to any
transfer of its Shares, to cause the transferee to agree to the provisions of
this Article V, whereupon such transferee shall be subject to the provisions
hereof to the same extent as the Investors in connection with its ownership of
the Shares transferred for purposes of this Article V.

     Section 5.4 Term. This Article V shall remain in effect until the earlier
of (a) closing of a Qualified Public Offering or (b) the date which is 10 years
after the date hereof.

                                   ARTICLE VI

                            MISCELLANEOUS PROVISIONS

     Section 6.1 Survival of Covenants. Each of the parties hereto agrees that
each covenant and agreement made by it in this Agreement or in any certificate,
instrument or

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<PAGE>   12

other document delivered pursuant to this Agreement is material, shall be deemed
to have been relied upon by the other parties and shall remain operative and in
full force and effect after the date hereof regardless of any investigation.
This Agreement shall not be construed so as to confer any right or benefit upon
any Person other than the parties hereto and their respective successors and
permitted assigns to the extent contemplated herein.

     Section 6.2 Legend on Securities. The Company, the Investors and the
Stockholders acknowledge and agree that the following legend shall be typed on
each certificate evidencing any of the securities issued hereunder held at any
time by any of the Stockholders or their Permitted Transferees:

     THE SECURITIES REPRESENTED HEREBY ARE SUBJECT TO THE PROVISIONS OF A
CERTAIN STOCKHOLDERS AGREEMENT, DATED AS OF JUNE 18, 1999, INCLUDING CERTAIN
RESTRICTIONS ON TRANSFER SET FORTH THEREIN. A COMPLETE AND CORRECT COPY OF SUCH
AGREEMENT IS AVAILABLE FOR INSPECTION AT THE PRINCIPAL OFFICE OF THE COMPANY AND
WILL BE FURNISHED UPON WRITTEN REQUEST AND WITHOUT CHARGE.

     Section 6.3 Amendment and Waiver. Any party may waive any provision hereof
intended for its benefit in writing. No failure or delay on the part of any
party hereto in exercising any right, power or remedy hereunder shall operate as
a waiver thereof. The remedies provided for herein are cumulative and are not
exclusive of any remedies that may be available to any party hereto at law or in
equity or otherwise. This Agreement only may be amended with the prior written
consent of (a) the Company, (b) if the amendment relates to Article II or IV,
the Founding Stockholders and (c) a Majority Interest of the Investors. Any
consent given by such Founding Stockholders or a Majority Interest of the
Investors as provided in the preceding sentence shall be binding on all
Stockholders and Permitted Transferees and all Investors, respectively, and no
Stockholders, Permitted Transferee or Investor shall have any cause of action
against any other Person for any action taken by such Person in reliance upon
such consent. All actions by the Company hereunder shall be taken by or upon the
direction of a majority of the members of the Board of Directors of the Company.

     Section 6.4 Notices. All notices and other communications provided for
herein shall be in writing and shall be deemed to have been duly given,
delivered and received (a) if delivered personally or (b) if sent by facsimile,
registered or certified mail (return receipt requested) postage prepaid, or by
courier guaranteeing next day delivery, in each case to the party to whom it is
directed at the following addresses (or at such other address for any party as
shall be specified by notice given in accordance with the provisions hereof,
provided that notices of a change of address shall be effective only upon
receipt thereof). Notices delivered personally shall be effective on the day so
delivered, notices sent by registered or certified mail shall be effective three
days after mailing, notices sent by facsimile shall be effective when receipt is
acknowledged, and notices sent by courier guaranteeing next day delivery shall
be effective on the earlier of the second business day after timely delivery to
the courier or the day of actual delivery by the courier:

                                       12
<PAGE>   13

         If to the Company:

         WebSideStory, Inc.
         6450 Lusk Boulevard, Suite E-205
         San Diego, CA  92121
         Facsimile:  (619) 546-0480
         Attn: President and Chief Executive Officer

         If to the Investors:

         TA Associates, Inc.
         70 Willow Road, Suite 100
         Menlo Park, California 94025
         Facsimile:  (650) 326-4933
         Attn:  Mr. Benjamin H. Ball

         Summit Partners, L.P.
         499 Hamilton Avenue, Suite 200
         Palo Alto, CA  94301
         Facsimile:  (650) 321-1188
         Attn:  Mr. Walter G. Kortschak

     Section 6.5 Headings. The Article and Section headings used or contained in
this Agreement are for convenience of reference only and shall not affect the
construction of this Agreement.

     Section 6.6 Counterparts. This Agreement may be executed in one or more
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which together
shall be deemed to constitute one and the same agreement.

     Section 6.7 Remedies; Severability. It is specifically understood and
agreed that any breach of the provisions of this Agreement by any Person subject
hereto will result in irreparable injury to the other parties hereto, that the
remedy at law alone will be an inadequate remedy for such breach, and that, in
addition to any other legal or equitable remedies which they may have, such
other parties may enforce their respective rights by actions for specific
performance (to the extent permitted by law) and the Company may refuse to
recognize any unauthorized transferee as one of its Stockholders for any
purpose, including, without limitation, for purposes of dividend and voting
rights, until the relevant party or parties have complied with all applicable
provisions of this Agreement.

     In the event that any one or more of the provisions contained herein, or
the application thereof in any circumstances, is held invalid, illegal or
unenforceable in any respect for any reason, the validity, legality and
enforceability of any such provision in every other respect and of the remaining
provisions contained herein shall not be in any way impaired thereby, it being

                                       13
<PAGE>   14

intended that all of the rights and privileges of the parties hereto shall be
enforceable to the fullest extent permitted by law.

     Section 6.8 Entire Agreement. This Agreement, together with the Purchase
Agreement and any other agreements specifically contemplated hereby and thereby,
is intended by the parties as a final expression of their agreement and intended
to be complete and exclusive statement of the agreement and understanding of the
parties hereto in respect of the subject matter contained herein and therein.
This Agreement and the Purchase Agreement and other agreements specifically
contemplated hereby and thereby (including the exhibits hereto and thereto)
supersede all prior agreements and understandings between the parties with
respect to such subject matter.

     Section 6.9 Adjustments. All references to share prices and amounts herein
shall be equitably adjusted to reflect stock splits, stock dividends,
recapitalizations and similar changes affecting the capital stock of the
Company.

     Section 6.10 Law Governing. This Agreement shall be construed and enforced
in accordance with and governed by the laws of the State of California (without
giving effect to principles of conflicts of law).

     Section 6.11 Successors and Assigns. This Agreement shall be binding upon
and inure to the benefit of the respective successors and permitted assigns of
the parties hereto as contemplated herein, and any successor to the Company by
way of merger or otherwise shall specifically agree to be bound by the terms
hereof as a condition of such successor. The rights of the Investors hereunder
shall be assignable to Transferees of their Shares as contemplated herein. This
Agreement may not be assigned by any Stockholders, except as provided herein,
without the prior written consent of a Majority Interest of the Investors and,
without such prior written consent, any attempted assignment shall be null and
void.

     Section 6.12 Dispute Resolution. Except as provided below, any dispute
arising out of or relating to this Agreement or the breach, termination or
validity hereof shall be finally settled by binding arbitration conducted
expeditiously by one arbitrator in accordance with the J.A.M.S./Endispute
Streamlined Arbitration Rules and Procedures (the "J.A.M.S. Rules"). The
arbitration shall be governed by the United States Arbitration Act, 9 U.S.C.
Sections 1-16, and judgment upon the award rendered by the arbitrator may be
entered by any court having jurisdiction thereof. The place of arbitration shall
be San Diego, California.

     Such proceedings shall be administered by the arbitrator in accordance with
the J.A.M.S. Rules as he/she deems appropriate, however, such proceedings shall
be conducted in accordance with the following agreed upon procedures:

         (a) mandatory exchange of all relevant documents, to be accomplished
within forty-five (45) days of the initiation of the procedure (documents not so
exchanged will be excluded from the evidence considered at the hearing absent a
showing of good cause)

         (b) no other discovery

                                       14
<PAGE>   15

         (c) hearings before the arbitrator which shall consist of a summary
presentation by each side of not more than three (3) hours; such hearings to
take place on one or two days at a maximum; and

         (d) decision to be rendered not more than ten (10) days following such
hearings.

     Notwithstanding anything to the contrary contained herein, the provisions
of this Section 6.12 shall not apply with regard to any equitable remedies to
which any party may be entitled hereunder.

     Each of the parties hereto (a) hereby irrevocably submits to the personal
jurisdiction of any court of competent jurisdiction in the United States for the
purpose of enforcing the award or decision in any such proceeding, (b) hereby
waives, and agrees not to assert, by way of motion, as a defense, or otherwise,
in any such suit, action or proceeding, any claim that it is not subject
personally to the jurisdiction of the above-named courts, that its property is
exempt or immune from attachment or execution (except as protected by applicable
law), that the suit, action or proceeding is brought in an inconvenient forum,
that the venue of the suit, action or proceeding is improper or that this
Agreement or the subject matter hereof may not be enforced in or by such court,
and hereby waives and agrees not to seek any review by any court of any other
jurisdiction which may be called upon to grant an enforcement of the judgment of
any such court. Each of the parties hereto hereby consents to service of process
by registered mail at the address to which notices are to be given. Each of the
parties hereto agrees that its or his submission to jurisdiction and its or his
consent to service of process by mail is made for the express benefit of the
other parties hereto. Final judgment against any party hereto in any such
action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or
pursuant to the laws of such other jurisdiction.

     Section 6.13 Term. This Agreement shall remain in effect until the closing
of a Qualified Public Offering, provided that Article IV shall terminate in any
event on the tenth anniversary of this Agreement if not earlier terminated.

                            [SIGNATURE PAGE FOLLOWS]

                                       15
<PAGE>   16

     IN WITNESS WHEREOF, the parties hereto have caused this Stockholders
Agreement to be duly executed as of the date first set forth above.

                             THE COMPANY:

                             WEBSIDESTORY, INC.

                             By: /s/ Blaise Barrelet
                                ____________________________________
                                    Name:  Blaise Barrelet
                                    Title: President and Chief Executive Officer

                             FOUNDING STOCKHOLDERS:

                              /s/ Blaise Barrelet
                             -----------------------------------------
                             BLAISE BARRELET

                              /s/ Agnes Barrelet
                             -----------------------------------------
                             AGNES BARRELET

                              /s/ Michael Christian
                             -----------------------------------------
                             MICHAEL CHRISTIAN

<PAGE>   17

                               INVESTORS:

                               SUMMIT VENTURES V, L.P.
                               By:  Summit Partners V, L.P., its General Partner
                               By:  Summit Partners, LLC, its General Partner

                                   /s/ Walter G. Kortschak
                               ----------------------------------
                               Walter G. Kortschak
                               Member

                               SUMMIT V COMPANION FUND, L.P.
                               By:  Summit Partners V, L.P., its General Partner
                               By:  Summit Partners, LLC, its General Partner

                                   /s/ Walter G. Kortschak
                               ----------------------------------
                               Walter G. Kortschak
                               Member

                               SUMMIT V ADVISORS FUND, L.P.
                               By:  Summit Partners, LLC, its General Partner

                                   /s/ Walter G. Kortschak
                               ----------------------------------
                               Walter G. Kortschak
                               Member

                               SUMMIT V ADVISORS FUND (QP), L.P.
                               By:  Summit Partners, LLC, its General Partner

                                   /s/ Walter G. Kortschak
                               ----------------------------------
                               Walter G. Kortschak
                               Member

<PAGE>   18

                               SUMMIT INVESTORS III, L.P.

                                   /s/ Walter G. Kortschak
                               ----------------------------------
                               Walter G. Kortschak
                               General Partner

                               TA/ADVENT VIII L.P.
                               By:  TA Associates VIII LLC, its General Partner
                               By:  TA Associates, Inc., its Manager

                                   /s/ Jeffrey T. Chambers
                               ----------------------------------
                               Jeffrey T. Chambers
                               Managing Director

                               ADVENT ATLANTIC AND PACIFIC III L.P.
                               By:  TA Associates AAP III Partners,
                                    its General Partner
                               By:  TA Associates, Inc., its General Partner

                                   /s/ Jeffrey T. Chambers
                               ----------------------------------
                               Jeffrey T. Chambers
                               Managing Director

                               TA INVESTORS LLC
                               By:  TA Associates Inc., its Manager

                                   /s/ Jeffrey T. Chambers
                               ----------------------------------
                               Jeffrey T. Chambers
                               Managing Director

<PAGE>   19

                               TA EXECUTIVES FUND LLC
                               By:  TA Associates, Inc., its Manager

                                /s/ Jeffrey T. Chambers
                               ----------------------------------
                               Jeffrey T. Chambers
                               Managing Director

                   [SIGNATURE PAGE TO STOCKHOLDERS AGREEMENT]

<PAGE>   20

                                    EXHIBIT A

                            Form of Joinder Agreement

     The undersigned hereby agrees, effective as of the date hereof, to become a
party to that certain Stockholders Agreement (the "Agreement") dated as of June
18, 1999 by and among Web Side Story, Inc. (the "Company") and the parties named
therein and, for all purposes of the Agreement, the undersigned shall be
included within the term "Stockholders" (as defined in the Agreement). The
address and facsimile number to which notices may be sent to the undersigned is
as follows:

________________________________________________________________________________

Facsimile No. ____________________.

                                                     __________________________
                                                     [NAME OF UNDERSIGNED]<PAGE>   1
                                                                   Exhibit 10.36

                          REGISTRATION RIGHTS AGREEMENT

     THIS REGISTRATION RIGHTS AGREEMENT (this "Agreement") is dated as of the
18th day of June, 1999, by and among WebSideStory, Inc., a California
corporation (the "Company"), and the persons designated as Investors on the
signature pages hereto and any permitted assignees thereof (each, an "Investor"
and collectively, the "Investors").

     WHEREAS, the parties to this Agreement are simultaneously entering into a
certain Stock Purchase Agreement, dated as of the date hereof (the "Purchase
Agreement"), whereby the Investors have agreed to purchase (i) shares of
Convertible Redeemable Participating Preferred Stock of the Company
("Convertible Stock"), which are convertible into shares of Common Stock of the
Company, and (ii) shares of Redeemable Preferred Stock of the Company
("Redeemable Stock"); and

     WHEREAS, the execution of this Agreement is an inducement and a condition
precedent to the purchase by the Investors of the shares of Convertible Stock
and the shares of Redeemable Stock under the Purchase Agreement.

     NOW, THEREFORE, in consideration of the premises, as an inducement to the
Investors to consummate the transactions contemplated by the Purchase Agreement,
and for other good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, the Company and the Investors hereby covenant and
agree with each other as follows:

     1. Certain Definitions. As used in this Agreement, the following terms
shall have the following respective meanings:

         "Board of Directors" means the Board of Directors of the Company.

         "Commission" shall mean the United States Securities and Exchange
Commission, or any other federal agency at the time administering the Securities
Act and the Exchange Act.

         "Common Stock" shall mean the common stock of the Company and any other
securities into which or for which such common stock may be converted or
exchanged pursuant to a plan of recapitalization, reorganization, merger, sale
of assets or otherwise.

         "Company" shall refer to the Company and any successor or successors
thereto.

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

         "Majority Interest" means the Investors holding not less than a
majority in interest in the outstanding Registrable Securities held by all
Investors.

<PAGE>   2

         "Person" shall mean an individual, a corporation, a partnership, a
joint venture, a trust, an unincorporated organization, a limited liability
company or partnership, a government and any agency or political subdivision
thereof.

         "Registrable Securities" shall mean (i) any shares of Common Stock
received by the Investors, or subject to acquisition by any Investor upon
conversion of the Convertible Stock (it being understood that for purposes of
this Agreement, a Person will be deemed to be a holder of Registrable Securities
whenever such Person has the right to then acquire or obtain from the Company
any Registrable Securities, whether or not such acquisition has actually been
effected) and (ii) any other securities issued and issuable with respect to any
such shares described in clause (i) above by way of a stock dividend or stock
split or in connection with a combination of shares, recapitalization, merger,
consolidation or other reorganization; provided, however, that notwithstanding
anything to the contrary contained herein, "Registrable Securities" shall not at
any time include any securities (i) registered and sold pursuant to the
Securities Act, (ii) sold to the public pursuant to Rule 144 or (iii) which
could then be sold in their entirety pursuant to Rule 144(k) without limitation
or restriction.

         "Registration Expenses" shall mean the expenses so described in Section
6 hereof.

         "Rule 144" shall mean Rule 144 promulgated under the Securities Act (or
any comparable successor rules).

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

     2. Demand Registrations.

         (a) At any time after the first anniversary of the date hereof, a
Majority Interest of the Investors may notify the Company that they intend to
offer or cause to be offered for public sale all or any portion of their
Registrable Securities (representing offering proceeds aggregating not less than
$20 million for an initial public offering or $10 million otherwise) in the
manner specified in such request. Upon receipt of such request, the Company
shall promptly deliver notice of such request to all Persons holding Registrable
Securities who shall then have thirty (30) days to notify the Company in writing
of their desire to be included in such registration. If the request for
registration contemplates an underwritten public offering, the Company shall
state such in the written notice and in such event the right of any Person to
participate in such registration shall be conditioned upon their participation
in such underwritten public offering and the inclusion of their Registrable
Securities in the underwritten public offering to the extent provided herein.
The Company will use its reasonable best efforts to expeditiously effect the
registration of all Registrable Securities whose holders request participation
in such registration under the Securities Act and to qualify such Registrable
Securities for sale under any state blue sky law; provided, however, that the
Company shall not be required to effect registration pursuant to a request under
this Section 2 more than two (2) times for the holders of the Registrable
Securities as a group. Notwithstanding anything to the contrary contained
herein, if the Company receives a request for registration under this Section 2,
then (i) the Company may advise the requesting Investors, within fifteen (15)
days of its receipt of such request, that it

                                       2
<PAGE>   3

intends to file a registration statement for the primary issuance of securities
in an underwritten public offering, and (ii) assuming that the Company files
such registration statement within seventy-five (75) days of its receipt of such
request, the Company's registration obligations under this Section 2 shall not
apply with respect to such request and no additional request may be made under
this Section 2 within one hundred eighty (180) days after the effective date of
such registration statement. In addition, the Company may postpone the filing or
the effectiveness of any registration statement pursuant to this Section 2 for a
reasonable time period, provided that such postponements shall not exceed one
hundred twenty (120) days in the aggregate during any twelve (12) month period,
if (i) the Company has been advised by legal counsel that such filing or
effectiveness would require disclosure of a material financing, acquisition or
other corporate transaction or development, and the Board of Directors of the
Company determines in good faith that such disclosure is not in the best
interests of the Company and its stockholders or (ii) the Board of Directors of
the Company determines in good faith that there is a valid business purpose or
reason for delaying filing or effectiveness. A registration will not count as a
requested registration under this Section 2(a) until the registration statement
relating to such registration has been declared effective by the Commission at
the request of the initiating holders; provided, however, that, if a Majority
Interest of the participating holders of Registrable Securities shall request,
in writing, that the Company withdraw a registration statement which has been
filed under this Section 2(a) but not yet been declared effective, a majority in
interest of such holders may thereafter request the Company to reinstate such
registration statement, if permitted under the Securities Act, or to file
another registration statement, in accordance with the procedures set forth
herein.

         (b) If a requested registration pursuant to Section 2(a) involves an
underwritten public offering and the managing underwriter of such offering
determines in good faith that the number of securities sought to be offered
should be limited due to market conditions, then the number of securities to be
included in such underwritten public offering shall be reduced to a number
deemed satisfactory by such managing underwriter, provided that the shares to be
excluded shall be determined in the following sequence: (i) first, securities
held by any other Persons (other than the Investors holding Registrable
Securities) not having either registration rights or contractual, incidental
"piggy back" rights to include such securities in the registration statement,
(ii) second, shares sought to be registered by the Company, (iii) third,
Registrable Securities of holders who did not make the original request for
registration, and (iv) fourth, Registrable Securities of holders who requested
such registration pursuant to Section 2(a), it being understood that no shares
shall be registered for the account of the Company or any shareholder other than
the Investors unless all Registrable Securities for which Investors have
requested registration have been registered. If there is a reduction of the
number of Registrable Securities pursuant to clauses (i), (iii) or (iv), such
reduction shall be made on a pro rata basis (based upon the aggregate number of
shares of Common Stock or Registrable Securities held by the holders in each
tranche and subject to the priorities set forth in the preceding sentence).

         (c) With respect to a request for registration pursuant to Section 2(a)
which is for an underwritten public offering, the managing underwriter shall be
chosen by the Investors holding not less than a Majority Interest of the
Registrable Securities to be sold in such offering, subject to the Company's
consent, which consent shall not be unreasonably withheld. The Company may not
cause any other registration of securities for sale for its own account (other
than a registration effected solely to implement an employee benefit plan or a
transaction to

                                       3
<PAGE>   4

which Rule 145 of the Securities Act is applicable) to become effective within
one hundred eighty (180) days following the effective date of any registration
required pursuant to this Section 2 or such lesser period as may be consented to
by the managing underwriter.

     3. "Market Stand-Off" Agreement. Notwithstanding the rights granted
pursuant to Section 2(a), each Investor hereby agrees that, during the period of
duration (not to exceed 180 days) specified by the Company and an underwriter of
Common Stock or other securities of the Company, following the effective date of
a registration statement of the Company filed under the Securities Act, it will
not, to the extent requested by the Company and such underwriter, directly or
indirectly sell, offer to sell, contract to sell (including, without limitation,
any short sale), grant any option to purchase or otherwise transfer or dispose
of any securities of the Company held by it at any time during such period
except shares of Common Stock included in such registration; provided, however,
that:

         (a) such agreement will be applicable only to the first such
registration statement of the Company which covers Common Stock (or other
securities) to be sold on its behalf to the public in an underwritten offering;
and

         (b) all officers and directors of the Company and all other persons
with registration rights (whether or not pursuant to this Agreement) enter into
similar agreements.

     In order to enforce the foregoing covenant, the Company may impose
stop-transfer instructions with respect to the Registrable Securities of each
Investor (and the shares or securities of every other person subject to the
foregoing restriction) until the end of such 180-day period.

     4. Piggyback Registration. If the Company at any time proposes to register
any of its Common Stock under the Securities Act for sale to the public
(including pursuant to a demand under Section 2 hereof as provided therein and
except with respect to registration statements on Forms S-4, S-8 or another form
not available for registering the Registrable Securities for sale to the
public), each such time it will give written notice at the applicable address of
record to each holder of Registrable Securities of its intention to do so. Upon
the written request of any of such holders of the Registrable Securities, given
within thirty (30) days after receipt by such Person of such notice, the Company
will, subject to the limits contained in this Section 4, use its reasonable best
efforts to cause all such Registrable Securities of said requesting holders to
be registered under the Securities Act and qualified for sale under any state
blue sky law, all to the extent required to permit such sale or other
disposition of said Registrable Securities; provided, however, that if the
Company is advised in writing in good faith by any managing underwriter of the
Company's securities being offered in a public offering pursuant to such
registration statement that the amount to be sold by persons other than the
Company (collectively, "Selling Stockholders") is greater than the amount which
can be offered without adversely affecting the offering, the Company may reduce
the amount offered for the accounts of Selling Stockholders (including such
holders of shares of Registrable Securities) to a number deemed satisfactory by
such managing underwriter; and provided further, that the shares to be excluded
shall be determined in the following sequence (except with respect to a demand
under Section 2 hereof): (i) first, securities held by any Persons not having
any such contractual, incidental registration rights; (ii) second, securities
held by any Persons having contractual, incidental registration

                                       4
<PAGE>   5

rights pursuant to an agreement which is not this Agreement; (iii) third,
securities held by the Founders (as defined in the Purchase Agreement); and (iv)
fourth, all Registrable Securities in each case as determined on a pro rata
basis in accordance with their holdings. Notwithstanding the foregoing, except
with respect to the Company's first registration of Common Stock pursuant to the
Securities Act, in no event shall the number of Registrable Securities included
in a registration pursuant to this section be reduced to less than twenty
percent (20%) of all shares to be registered.

     5. Registration Procedures. If and whenever the Company is required by the
provisions of this Agreement to use its reasonable best efforts to effect the
registration of any of its securities under the Securities Act, the Company
will, as expeditiously as possible:

         (a) use its best efforts diligently to prepare and file with the
Commission a registration statement on the appropriate form under the Securities
Act with respect to such securities, which form shall comply as to form in all
material respects with the requirements of the applicable form and include all
financial statements required by the Commission to be filed therewith, and use
its reasonable best efforts to cause such registration statement to become and
remain effective until completion of the proposed offering (but not for more
than one hundred eighty (180) days);

         (b) prepare and file with the Commission such amendments and
supplements to such registration statement and the prospectus used in connection
therewith as may be necessary to keep such registration statement effective
until the completion of the offering (but not for more than one hundred eighty
(180) days) and to comply with the provisions of the Securities Act with respect
to the sale or other disposition of all securities covered by such registration
statement whenever the seller or sellers of such securities shall desire to sell
or otherwise dispose of the same, but only to the extent provided in this
Agreement;

         (c) furnish to each selling holder of Registrable Securities and the
underwriters, if any, such number of copies of such registration statement, any
amendments thereto, any documents incorporated by reference therein, the
prospectus, including a preliminary prospectus, in conformity with the
requirements of the Securities Act, and such other documents as such selling
holder may reasonably request in order to facilitate the public sale or other
disposition of the securities owned by such selling holder;

         (d) use its best efforts to register or qualify the securities covered
by such registration statement under and to the extent required by such other
securities or state blue sky laws of such jurisdictions as each selling holder
of Registrable Securities shall reasonably request, and do any and all other
acts and things which may be necessary under such securities or blue sky laws to
enable such selling holder to consummate the public sale or other disposition in
such jurisdictions of the securities owned by such selling holder, except that
the Company shall not for any such purpose be required to qualify to do business
as a foreign corporation in any jurisdiction wherein it is not so qualified;

         (e) within a reasonable time before each filing of the registration
statement or prospectus or amendments or supplements thereto with the
Commission, furnish to counsel selected by the holders of a Majority Interest
copies of such documents proposed to be filed,

                                       5
<PAGE>   6

which documents shall be subject to the reasonable approval of such counsel,
which approval shall not be unreasonably withheld;

         (f) promptly notify each selling holder of Registrable Securities, such
selling holders' counsel and any underwriter and (if requested by any such
Person) confirm such notice in writing, of the happening of any event which
makes any statement made in the registration statement or related prospectus
untrue or which requires the making of any changes in such registration
statement or prospectus so that they will not contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary to make the statements therein in the light of the circumstances
under which they were made not misleading; and, as promptly as practicable
thereafter, prepare and file with the Commission and furnish a supplement or
amendment to such prospectus so that, as thereafter deliverable to the
purchasers of such Registrable Securities, such prospectus will not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements therein, in the light of the circumstances under which
they were made, not misleading;

         (g) use its reasonable best efforts to prevent the issuance of any
order suspending the effectiveness of a registration statement, and if one is
issued use its reasonable best efforts to obtain the withdrawal of any order
suspending the effectiveness of a registration statement at the earliest
possible moment;

         (h) if requested by the managing underwriter or underwriters (if any),
any selling holder of Registrable Securities, or such selling holder's counsel,
promptly incorporate in a prospectus supplement or post-effective amendment such
information as such Person requests to be included therein with respect to the
selling holder or the securities being sold, including, without limitation, with
respect to the securities being sold by such selling holder to such underwriter
or underwriters, the purchase price being paid therefor by such underwriter or
underwriters and with respect to any other terms of an underwritten offering of
the securities to be sold in such offering, and promptly make all required
filings of such prospectus supplement or post-effective amendment;

         (i) make available to each selling holder of Registrable Securities,
any underwriter participating in any disposition pursuant to a registration
statement, and any attorney, accountant or other agent or representative
retained by any such selling holder or underwriter (collectively, the
"Inspectors"), all financial and other records, pertinent corporate documents
and properties of the Company (collectively, the "Records"), as shall be
reasonably necessary to enable them to exercise their due diligence
responsibility, and cause the Company's officers, directors and employees to
supply all information requested by any such Inspector in connection with such
registration statement subject, in each case, to such confidentiality agreements
as the Company shall reasonably request;

         (j) enter into any reasonable underwriting agreement required by the
proposed underwriter(s) for the selling holders of Registrable Securities, if
any, and use its reasonable best efforts to facilitate the public offering of
the securities;

         (k) request that each prospective selling holder be furnished a signed
counterpart, addressed to the prospective selling holder, of , if and to the
extent permitted by

                                       6
<PAGE>   7

applicable professional standards, a "comfort" letter signed by the independent
public accountants who have certified the Company's financial statements
included in the registration statement, covering substantially the same matters
with respect to the registration statement (and the prospectus included therein)
and with respect to events subsequent to the date of the financial statements,
as are customarily covered (at the time of such registration) in accountants'
letters delivered to the underwriters in underwritten public offerings of
securities;

         (l) use its reasonable best efforts to cause the securities covered by
such registration statement to be listed on the securities exchange or quoted on
the quotation system on which the Common Stock is then listed or quoted (or, if
the Common Stock is not yet listed or quoted, then on such exchange or quotation
system as the selling holders of Registrable Securities and the Company shall
determine);

         (m) otherwise use its reasonable best efforts to comply with all
applicable rules and regulations of the Commission and make generally available
to its security holders, in each case as soon as reasonably practicable, but not
later than 90 days after the close of the period covered thereby, an earnings
statement of the Company which will satisfy the provisions of Section 11(a) of
the Securities Act and Rule 158 thereunder (or any comparable successor
provisions); and

         (n) otherwise cooperate with the underwriter(s), the Commission and
other regulatory agencies and take all reasonable actions and execute and
deliver or cause to be executed and delivered all documents reasonably necessary
to effect the registration of any securities under this Agreement.

     6. Expenses. All reasonable expenses incurred by the Company and the
Investors in effecting the registrations provided for in Sections 2, 3 and 4,
including, without limitation, all registration and filing fees, printing
expenses, fees and disbursements of counsel for the Company and one counsel for
the selling stockholders as a group (selected by a majority in interest of the
holders of Registrable Securities who participate in the registration),
underwriting expenses (other than fees, commissions or discounts), expenses of
any audits incident to or required by any such registration and expenses of
complying with the securities or blue sky laws of any jurisdictions pursuant to
Section 5(d) hereof (all of such expenses referred to as "Registration
Expenses"), shall be paid by the Company.

     7. Indemnification.

         (a) To the maximum extent permitted by law, the Company shall indemnify
and hold harmless the selling holder of Registrable Securities, each underwriter
(as defined in the Securities Act), and each other Person, if any, who controls
(within the meaning of the Securities Act) such selling holder or underwriter
(individually and collectively, the "Indemnified Person") against any losses,
claims, damages or liabilities (collectively, "liability"), joint or several, to
which such Indemnified Person may become subject under the Securities Act or any
other statute or at common law, insofar as such liability (or action in respect
thereof) arises out of or is based upon (i) any untrue statement or alleged
untrue statement of any material fact contained, on the effective date thereof,
in any registration statement under which such securities were registered under
the Securities Act, any preliminary prospectus or final prospectus contained
therein, or any

                                       7
<PAGE>   8

amendment or supplement thereto, or (ii) 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. Except as otherwise provided in Section
7(e), the Company shall reimburse each such selling holder of Registrable
Securities in connection with investigating or defending any such liability as
reasonable expenses in connection with the same are incurred; provided, however,
that the Company shall not be liable to any such selling holder of Registrable
Securities in any such case to the extent that any such liability arises out of
or is based upon any untrue statement or alleged untrue statement or omission or
alleged omission made in such registration statement, preliminary or final
prospectus, or amendment or supplement thereto in reliance upon and in
conformity with information furnished in writing to the Company by such selling
holder of Registrable Securities specifically for use therein; and provided
further, that the Company shall not be required to indemnify any Indemnified
Person against any liability arising from any untrue or misleading statement or
omission contained in any preliminary prospectus if such deficiency is corrected
in the final prospectus or for any liability which arises out of the failure of
any Indemnified Person to deliver a prospectus as required by the Securities
Act.

         (b) Each selling holder of any securities included in such registration
being effected shall indemnify and hold harmless each other selling holder of
any securities, the Company, its directors and officers, each underwriter and
each other Person, if any, who controls (within the meaning of the Securities
Act) the Company or such underwriter (individually and collectively also the
"Indemnified Person"), against any liability, joint or several, to which any
such Indemnified Person may become subject under the Securities Act or any other
statute or at common law, insofar as such liability (or actions in respect
thereof) arises out of or is based upon (i) any untrue statement or alleged
untrue statement of any material fact contained, on the effective date thereof,
in any registration statement under which securities were registered under the
Securities Act at the request of such selling holder, any preliminary prospectus
or final prospectus contained therein, or any amendment or supplement thereto,
or (ii) any omission or alleged omission by such selling holder to state therein
a material fact required to be stated therein or necessary to make the
statements therein not misleading, in the case of (i) and (ii) to the extent,
but only to the extent, that such untrue statement or alleged untrue statement
or omission or alleged omission was made in such registration statement,
preliminary or final prospectus, amendment or supplement thereto in reliance
upon and in conformity with information furnished in writing to the Company by
such selling holder specifically for use therein. Such selling holder shall
reimburse any Indemnified Person for any legal fees incurred in investigating or
defending any such liability; provided, however, that such selling holder's
obligations hereunder shall be limited to an amount equal to the proceeds to
such selling holder of the securities sold in any such registration; and
provided further, that no selling holder shall be required to indemnify any
Person against any liability arising from any untrue or misleading statement or
omission contained in any preliminary prospectus if such deficiency is corrected
in the final prospectus or for any liability which arises out of the failure of
any Person to deliver a prospectus as required by the Securities Act.

         (c) Indemnification similar to that specified in Sections 7(a) and (b)
shall be given by the Company and each selling holder (with such modifications
as may be appropriate) with respect to any required registration or other
qualification of their securities under any federal or state law or regulation
of governmental authority other than the Securities Act.

                                       8
<PAGE>   9

         (d) Promptly after receipt by an Indemnified Person under this Section
7 of notice of the commencement of any action (including any governmental
action), such Indemnified Person will, if a claim in respect thereof is to be
made against any indemnifying party under this Section 7, deliver to the
indemnifying party a written notice of the commencement thereof and the
indemnifying party will have the right to participate in, and, to the extent the
indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume the defense thereof with qualified counsel;
provided, however, that an Indemnified Person (together with all other
Indemnified Persons which may be represented without conflict by one counsel)
will have the right to retain one separate counsel, with the reasonable fees and
expenses to be paid by the indemnifying party, if representation of such
Indemnified Person by the counsel retained by the indemnifying party is
inappropriate due to actual or potential differing interests between such
Indemnified Person and any other party represented by such counsel in such
proceeding. The failure to deliver written notice to the indemnifying party
within a reasonable time of the commencement of any such action, if prejudicial
to its ability to defend such action, will relieve such indemnifying party of
any liability to the Indemnified Person under this Section 7, but the omission
so to deliver written notice to the indemnifying party will not relieve it of
any liability that it may have to any Indemnified Person otherwise than under
this Section 7.

         (e) If the indemnification provided for in this Section 7 for any
reason is held by a court of competent jurisdiction to be unavailable to an
Indemnified Person in respect of any losses, claims, damages, expenses or
liabilities referred to therein, then each indemnifying party under this Section
7, in lieu of indemnifying such Indemnified Person thereunder, shall contribute
to the amount paid or payable by such Indemnified Person as a result of such
losses, claims, damages, expenses or liabilities (i) in such proportion as is
appropriate to reflect the relative benefits received by the Company, the
selling holders and the underwriters from the offering of the Registrable
Securities or (ii) if the allocation provided by clause (i) above is not
permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause (i) above but also the relative
fault of the Company, the other selling holders and the underwriters in
connection with the statements or omissions which resulted in such losses,
claims, damages, expenses or liabilities, as well as any other relevant
equitable considerations. The relative benefits received by the Company, the
selling holders and the underwriters shall be deemed to be in the same
respective proportions that the net proceeds from the offering (before deducting
expenses) received by the Company and the selling holders and the underwriting
discount received by the underwriters, in each case as set forth in the table on
the cover page of the applicable prospectus, bear to the aggregate public
offering price of the Registrable Securities. The relative fault of the Company,
the selling holders and the underwriters shall be determined by reference to,
among other things, whether the untrue or alleged untrue statement of a material
fact or the omission or alleged omission to state a material fact relates to
information supplied by the Company, the selling holders or the underwriters and
the parties' relative intent, knowledge, access to information and opportunity
to correct or prevent such statement or omission.

         (f) The Company, the selling holders and the underwriters agree that it
would not be just and equitable if contribution pursuant to this Section 7 were
determined by pro rata or per capita allocation or by any other method of
allocation which does not take account of the equitable considerations referred
to in the immediately preceding paragraph. In no event, however, shall a selling
holder be required to contribute any amount under this Section 7(f) in

                                       9
<PAGE>   10

excess of the lesser of (i) that proportion of the total of such losses, claims,
damages or liabilities indemnified against equal to the proportion of the total
Registrable Securities sold under such registration statement which are being
sold by such selling holder or (ii) the proceeds received by such selling holder
from its sale of Registrable Securities under such registration statement. No
person found guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the Securities Act) shall be entitled to contribution from any
person who was not found guilty of such fraudulent misrepresentation.

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

     8. Compliance with Rule 144.

         (a) In the event that the Company (i) registers a class of securities
under Section 12 of the Exchange Act or (ii) shall commence to file reports
under Section 13 or 15(d) of the Exchange Act, the Company will use its best
efforts thereafter to file with the Commission such information as is required
under the Exchange Act for so long as there are holders of Registrable
Securities; and in such event, the Company shall use its best efforts to take
all action as may be required as a condition to the availability of Rule 144.
The Company shall furnish to any holder of Registrable Securities upon
reasonable request a written statement executed by the Company as to the steps
it has taken to comply with the current public information requirement of Rule
144. After the occurrence of the first underwritten public offering of Common
Stock pursuant to an offering registered under the Securities Act on Form S-1 or
Form SB-2 (or any comparable successor forms), subject to the limitations on
transfers imposed by this Agreement, the Company shall use its reasonable best
efforts to facilitate and expedite transfers of Registrable Securities pursuant
to Rule 144, which efforts shall include timely notice to its transfer agent to
expedite such transfers of Registrable Securities.

         (b) Except with respect to a demand registration pursuant to Section 2,
prior to the Company's registration of any Registrable Securities hereunder on
behalf of an Investor, such Investor shall (i) use its reasonable best efforts
to sell the maximum number of Registrable Securities that such Investor is able
to sell pursuant to Rule 144 and (ii) exercise the registration rights hereunder
only in the case that such Investor determines in good faith that such rights
are necessary to sell such Registrable Securities in a timely manner.

     9. Amendments. The provisions of this Agreement may be amended, and the
Company may take any action herein prohibited or omit to perform any act herein
required to be performed by it, only with the written consent of the Company and
a Majority Interest of the Investors.

     10. Transferability of Registration Rights. The registration rights set
forth in this Agreement are transferable to each valid and proper transferee of
at least Two Million (2,000,000) shares of Registrable Securities. Each such
transferee of Registrable Securities must consent in writing to be bound by the
terms and conditions of this Agreement in order to acquire the rights granted
pursuant to this Agreement.

                                       10
<PAGE>   11

     11. Rights Which May Be Granted to Subsequent Investors. Other than
transferees of Registrable Securities under Section 10 hereof, the Company shall
not, without the prior written consent of a Majority Interest of the Investors,
(a) allow purchasers of the Company's securities to become a party to this
Agreement or (b) grant any other registration rights to any third parties other
than subordinate piggyback registration rights.

     12. Damages. The Company recognizes and agrees that each holder of
Registrable Securities will not have an adequate remedy if the Company fails to
comply with the terms and provisions of this Agreement and that damages will not
be readily ascertainable, and the Company expressly agrees that, in the event of
such failure, it shall not oppose an application by any holder of Registrable
Securities or any other Person entitled to the benefits of this Agreement
requiring specific performance of any and all provisions hereof or enjoining the
Company from continuing to commit any such breach of this Agreement.

     13. Miscellaneous.

         (a) All notices, requests, demands and other communications provided
for hereunder shall be in writing and mailed (by first class registered or
certified mail, postage prepaid), telegraphed, sent by express overnight courier
service or electronic facsimile transmission (with a copy by mail), or delivered
to the applicable party at the addresses indicated below:

       If to the Company:          WebSideStory, Inc.
                                   6450 Lusk Boulevard, Suite E-205
                                   San Diego, CA  92121
                                   Facsimile: (619) 546-0480
                                   Attn:  President and Chief Executive Officer

       If to the Investors:        TA Associates, Inc.
                                   70 Willow Road, Suite 100
                                   Menlo Park, California 94025
                                   Facsimile: (650) 326-4933
                                   Attn: Mr. Benjamin H. Ball

                                   Summit Partners
                                   499 Hamilton Avenue, Suite 200
                                   Palo Alto, CA  94301
                                   Facsimile: (650) 321-1188
                                   Attn: Mr. Walter G. Kortschak

       If to any other holder of Registrable Securities:

               At such Person's address for notice as set forth in the books and
               records of the Company.

or, as to each of the foregoing, at such other address as shall be designated by
such Person in a written notice to other parties complying as to delivery with
the terms of this subsection (a). All

                                       11
<PAGE>   12

such notices, requests, demands and other communications shall, when mailed,
telegraphed or sent, respectively, be effective (i) two days after being
deposited in the mails or (ii) one day after being delivered to the telegraph
company, deposited with the express overnight courier service or sent by
electronic facsimile transmission, respectively, addressed as aforesaid.

         (b) This Agreement shall be governed by and construed in accordance
with the laws of the State of California, without giving effect to conflict of
laws principles thereof.

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

         (d) If any provision of this Agreement shall be held to be illegal,
invalid or unenforceable, such illegality, invalidity or unenforceability shall
attach only to such provision and shall not in any manner affect or render
illegal, invalid or unenforceable any other provision of this Agreement, and
this Agreement shall be carried out as if any such illegal, invalid or
unenforceable provision were not contained herein.

     14. Dispute Resolution. Except as provided below, any dispute arising out
of or relating to this Agreement or the breach, termination or validity hereof
shall be finally settled by binding arbitration conducted expeditiously by one
arbitrator in accordance with the J.A.M.S./Endispute Streamlined Arbitration
Rules and Procedures (the "J.A.M.S. Rules"). The arbitration shall be governed
by the United States Arbitration Act, 9 U.S.C. Sections 1-16, and judgment upon
the award rendered by the arbitrator may be entered by any court having
jurisdiction thereof. The place of arbitration shall be San Diego, California.

     Such proceedings shall be administered by the arbitrator in accordance with
the J.A.M.S. Rules as he/she deems appropriate, however, such proceedings shall
be conducted in accordance with the following agreed upon procedures:

         (a) mandatory exchange of all relevant documents, to be accomplished
within forty-five (45) days of the initiation of the procedure (documents not so
exchanged will be excluded from the evidence considered at the hearing absent a
showing of good cause);

         (b) no other discovery;

         (c) hearings before the arbitrator which shall consist of a summary
presentation by each side of not more than three (3) hours; such hearings to
take place on one or two days at a maximum; and

         (d) decision to be rendered not more than ten (10) days following such
hearings.

     Notwithstanding anything to the contrary contained herein, the provisions
of this Section 14 shall not apply with regard to any equitable remedies to
which any party may be entitled hereunder.

                                       12
<PAGE>   13

     Each of the parties hereto (a) hereby irrevocably submits to the personal
jurisdiction of any court of competent jurisdiction in the United States for the
purpose of enforcing the award or decision in any such proceeding, (b) hereby
waives, and agrees not to assert, by way of motion, as a defense, or otherwise,
in any such suit, action or proceeding, any claim that it is not subject
personally to the jurisdiction of the above-named courts, that its property is
exempt or immune from attachment or execution (except as protected by applicable
law), that the suit, action or proceeding is brought in an inconvenient forum,
that the venue of the suit, action or proceeding is improper or that this
Agreement or the subject matter hereof may not be enforced in or by such court,
and hereby waives and agrees not to seek any review by any court of any other
jurisdiction which may be called upon to grant an enforcement of the judgment of
any such court. Each of the parties hereto hereby consents to service of process
by registered mail at the address to which notices are to be given. Each of the
parties hereto agrees that its or his submission to jurisdiction and its or his
consent to service of process by mail is made for the express benefit of the
other parties hereto. Final judgment against any party hereto in any such
action, suit or proceeding may be enforced in other jurisdictions by suit,
action or proceeding on the judgment, or in any other manner provided by or
pursuant to the laws of such other jurisdiction.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       13
<PAGE>   14

     IN WITNESS WHEREOF, the parties hereto have caused this Registration Rights
Agreement to be duly executed as of the date first set forth above.

                              THE COMPANY:

                              WEBSIDESTORY, INC.

                              By:    /s/ Blaise Barrelet
                                    ____________________________________
                                    Name:  Blaise Barrelet
                                    Title: President and Chief Executive Officer

                                       14
<PAGE>   15

                                INVESTORS:

                                SUMMIT VENTURES V, L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                /s/ Walter G. Kortschak
                                ----------------------------------
                                Walter G. Kortschak
                                Member

                                SUMMIT V COMPANION FUND, L.P.
                                By: Summit Partners V, L.P., its General Partner
                                By: Summit Partners, LLC, its General Partner

                                /s/ Walter G. Kortschak
                                ----------------------------------
                                Walter G. Kortschak
                                Member

                                SUMMIT V ADVISORS FUND, L.P.
                                By: Summit Partners, LLC, its General Partner

                                /s/ Walter G. Kortschak
                                ----------------------------------
                                Walter G. Kortschak
                                Member

                                SUMMIT V ADVISORS FUND (QP), L.P.
                                By: Summit Partners, LLC, its General Partner

                                /s/ Walter G. Kortschak
                                ----------------------------------
                                Walter G. Kortschak
                                Member

                                       15
<PAGE>   16

                                SUMMIT INVESTORS III, L.P.

                                /s/ Walter G. Kortschak
                                ----------------------------------
                                Walter G. Kortschak
                                General Partner

                                TA/ADVENT VIII L.P.
                                By:  TA Associates VIII LLC, its General Partner
                                By:  TA Associates, Inc., its Manager

                                /s/ Jeffrey T. Chambers
                                ----------------------------------
                                Jeffrey T. Chambers
                                Managing Director

                                ADVENT ATLANTIC AND PACIFIC III L.P.
                                By:  TA Associates AAP III Partners, its
                                     General Partner
                                By:  TA Associates, Inc., its General Partner

                                /s/ Jeffrey T. Chambers
                                ----------------------------------
                                Jeffrey T. Chambers
                                Managing Director

                                TA INVESTORS LLC
                                By:   TA Associates, Inc., its Manager

                                /s/ Jeffrey T. Chambers
                                ----------------------------------
                                Jeffrey T. Chambers
                                Managing Director

                                       16
<PAGE>   17

                                TA EXECUTIVES FUND LLC
                                By:   TA Associates, Inc., its Manager

                                /s/ Jeffrey T. Chambers
                                ----------------------------------
                                Jeffrey T. Chambers
                                Managing Director

                [SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT]

                                       17

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