<PAGE>

                                                                     EXHIBIT 4.6

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR
OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT
OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE
CORPORATION AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

                           WARRANT TO PURCHASE STOCK

Corporation:                WEBSIDESTORY, INC., a Delaware Corporation
Number of Shares:           120,767
Class of Stock:             Common
Initial Exercise Price:     $1.46 per share
Issue Date:                 April 30, 2001
Expiration Date:            April 30, 2006 (Subject to Article 4.1)

      THIS WARRANT CERTIFIES THAT, in consideration of the payment of $1.00 and
for other good and valuable consideration, IMPERIAL BANK or its assignee
("Holder") is entitled to purchase the number of fully paid and nonassessable
shares of the class of securities (the "Shares") of the corporation (the
"Company") at the initial exercise price per Share (the "Warrant Price") all as
set forth above and as adjusted pursuant to Article 2 of this warrant, subject
to the provisions and upon the terms and conditions set forth in this warrant.

                                    ARTICLE 1

                                    EXERCISE

      1.1 METHOD OF EXERCISE. Holder may exercise this warrant by delivering
this warrant and a duly executed Notice of Exercise in substantially the form
attached as Appendix 1 to the principal office of the Company. Unless Holder is
exercising the conversion right set forth in Section 1.2, Holder shall also
deliver to the Company a check for the aggregate Warrant Price for the Shares
being purchased.

      1.2 CONVERSION RIGHT. In lieu of exercising this warrant as specified in
Section 1.1, Holder may from time to time convert this warrant, in whole or in
part, into a number of Shares determined by dividing (a) the aggregate fair
market value of the Shares or other securities otherwise issuable upon exercise
of this warrant minus the aggregate Warrant Price of such Shares by (b) the
fair market value of one Share. The fair market value of the Shares shall be
determined pursuant to Section 1.4.

      1.3. [Intentionally Omitted.]

      1.4 FAIR MARKET VALUE. If the Shares are traded regularly in a public
market, the fair market value of the Shares shall be the closing price of the
Shares (or the closing price of the Company's stock into which the Shares are
convertible) reported for the business day immediately before Holder delivers
its Notice of Exercise to the Company. If the Shares are not regularly traded in
a public market, the Board of Directors of the Company shall determine fair
market value in its reasonable good faith judgment. The foregoing
notwithstanding, if Holder

                                       1

<PAGE>

advises the Board of Directors in writing that Holder disagrees with such
determination, then the Company and Holder shall promptly agree upon a reputable
investment banking firm to undertake such valuation. If the valuation of such
investment banking firm is greater than that determined by the Board of
Directors, then all fees and expenses of such investment banking firm shall be
paid by the Company. In all other circumstances, such fees and expenses shall be
paid by Holder.

      1.5 DELIVERY OF CERTIFICATE AND NEW WARRANT. Promptly after Holder
exercises or converts this warrant, the Company shall deliver to Holder
certificates for the Shares acquired and, if this warrant has not been fully
exercised or converted and has not expired, a new warrant representing the
Shares not so acquired.

      1.6 REPLACEMENT OF WARRANTS. On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this warrant and, in the case of loss, theft or destruction, on delivery of an
indemnity agreement reasonably satisfactory in form and amount to the Company
or, in the case of mutilation, on surrender and cancellation of this warrant,
the Company at its expense shall execute and deliver, in lieu of this warrant, a
new warrant of like tenor.

      1.7 REPURCHASE ON SALE, MERGER, OR CONSOLIDATION OF THE COMPANY.

            1.7.1 "ACQUISITION." For the purpose of this warrant, "Acquisition"
means any sale, license, or other disposition of all or substantially all of the
assets (including intellectual property) of the Company, or any reorganization,
consolidation, or merger of the Company where the holders of the Company's
securities before the transaction beneficially own less than 50% of the
outstanding voting securities of the surviving entity after the transaction.

            1.7.2 MANDATORY ASSUMPTION OF WARRANT. Upon the closing of any
Acquisition the successor entity shall assume the obligations of this warrant,
and this warrant shall be excercisable for the same securities, cash, and
property as would be payable for the Shares issuable upon exercise of the
unexercised portion of this warrant as if such Shares were outstanding on the
record date for the Acquisition and subsequent closing. The Warrant Price shall
be adjusted accordingly.

                                    ARTICLE 2

                            ADJUSTMENTS TO THE SHARES

      2.1 STOCK DIVIDENDS, SPLITS, ETC. If the Company declares or pays a
dividend on its common stock payable in common stock, or other securities,
subdivides the outstanding common stock into a greater or lesser amount, as
applicable, of common stock, then upon exercise of this warrant, for each Share
acquired, Holder shall receive, without cost to Holder, the total number and
kind of securities to which Holder would have been entitled had Holder owned the
Shares of record as of the date the dividend or subdivision occurred.

                                       2

<PAGE>

      2.2 RECLASSIFICATION, EXCHANGE OR SUBSTITUTION. Upon any reclassification,
exchange, substitution, or other event that results in a change of the number
and/or class of the securities issuable upon exercise or conversion of this
warrant, Holder shall be entitled to receive, upon exercise or conversion of
this warrant, the number and kind of securities and property that Holder would
have received for the Shares if this warrant had been exercised immediately
before such reclassification, exchange, substitution, or other event. Such an
event shall include any automatic conversion of the outstanding or issuable
securities of the Company of the same class or series as the Shares to common
stock pursuant to the terms of the Company's Articles of Incorporation upon the
closing of a registered public offering of the Company's common stock. The
Company or its successor shall promptly issue to Holder a new warrant for such
new securities or other property. The new warrant shall provide for adjustments
which shall be as nearly equivalent as may be practicable to the adjustments
provided for in this Article 2 including, without limitation, adjustments to the
Warrant Price and to the number of securities or property issuable upon exercise
of the new warrant. The provisions of this Section 2.2 shall similarly apply to
successive reclassifications, exchanges, substitutions, or other events.

      2.3 ADJUSTMENTS FOR COMBINATIONS, ETC. If the outstanding Shares are
combined or consolidated, by reclassification or otherwise, into a lesser number
of shares, the Warrant Price shall be proportionately increased.

      2.4 ADJUSTMENTS FOR DILUTING ISSUANCES. The Warrant Price and the number
of Shares issuable upon exercise of this warrant shall be subject to adjustment,
from time to time, in the manner set forth on EXHIBIT A, if attached, in the
event of Diluting Issuances (as defined on EXHIBIT A).

      2.5 NO IMPAERMENT. The Company shall not, by amendment of its Articles of
Incorporation or through a reorganization, transfer of assets, consolidation,
merger, dissolution, issue, or sale of securities or any other voluntary action,
avoid or seek to avoid the observance or performance of any of the terms to be
observed or performed under this warrant by the Company, but shall at all times
in good faith assist in carrying out all the provisions of this Article 2 and in
taking all such action as may be necessary or appropriate to protect Holder's
rights under this Article against impairment. If the Company takes any action
affecting the Shares or its common stock other than as described above that
adversely affects Holder's rights under this warrant, the Warrant Price shall be
adjusted downward and the number of Shares issuable upon exercise of this
warrant shall be adjusted upward in such a manner that the aggregate Warrant
Price of this warrant is unchanged.

      2.6 CERTIFICATE AS TO ADJUSTMENTS. Upon each adjustment of the Warrant
Price, the Company at its expense shall promptly compute such adjustment, and
furnish Holder with a certificate of its Chief Financial Officer setting forth
such adjustment and the facts upon which such adjustment is based. The Company
shall, upon written request, furnish Holder a certificate setting forth the
Warrant Price in effect upon the date thereof and the series of adjustments
leading to such Warrant Price.

                                       3

<PAGE>

                                    ARTICLE 3

                  REPRESENTATIONS AND COVENANTS OF THE COMPANY

      3.1 REPRESENTATIONS AND WARRANTES. The Company hereby represents and
warrants to the Holder as follows:

            (a) All Shares which may be issued upon the exercise of the purchase
right represented by this warrant, and all securities, if any, issuable upon
conversion of the Shares, shall, upon issuance, be duly authorized, validly
issued, fully paid and nonassessable, and free of any liens and encumbrances
except for restrictions on transfer provided for herein or under applicable
federal and state securities laws.

            (b) The Company's capitalization table previously provided to Holder
is true and complete as of the Issue Date.

      3.2 NOTICE OF CERTAIN EVENTS. If the Company proposes at any time (a) to
declare any dividend or distribution upon its common stock, whether in cash,
property, stock, or other securities and whether or not a regular cash dividend;
(b) to offer for subscription pro rata to the holders of any class or series of
its stock any additional shares of stock of any class or series or other rights;
(c) to effect any reclassification or recapitalization of common stock; or (d)
to merge or consolidate with or into any other corporation, or sell, lease,
license, or convey all or substantially all of its assets, or to liquidate,
dissolve or wind up, then, in connection with each such event, the Company shall
give Holder (1) at least 20 days prior written notice of the date on which a
record will be taken for such dividend, distribution, or subscription rights
(and specifying the date on which the holders of common stock will be entitled
thereto) or for determining rights to vote, if any, in respect of the matters
referred to in (a) and (b) above; and (2) in the case of the matters referred to
in (c) and (d) above at least 20 days prior written notice of the date when the
same will take place (and specifying the date on which the holders of common
stock will be entitled to exchange their common stock for securities or other
property deliverable upon the occurrence of such event).

      3.3 INFORMATION RIGHTS. So long as the Holder holds this warrant and/or
any of the Shares, the Company shall deliver to the Holder (a) promptly after
mailing, copies of all communiques to the shareholders of the Company, (b)
within ninety (90) days after the end of each fiscal year of the Company, the
annual audited financial statements of the Company certified by independent
public accountants of recognized standing and (c) within forty-five (45) days
after the end of each of the first three quarters of each fiscal year, the
Company's quarterly, unaudited financial statements.

                                    ARTICLE 4

                                  MISCELLANEOUS

      4.1 TERM: NOTICE OF EXPIRATION. This warrant is exercisable in whole or in
part, at any time and from time to time on or before the Expiration Date set
forth above; provided, however, that if the Company completes its initial public
offering within the three-year period

                                       4

<PAGE>

immediately prior to the Expiration Date, the Expiration Date shall
automatically be extended until the second anniversary of the effective date of
the Company's initial public offering. If this warrant has not been exercised
prior to the Expiration Date, this warrant shall be deemed to have been
automatically exercised on the Expiration Date by "cashless" conversion pursuant
to Section 1.2.

      4.2 LEGENDS. This warrant and the Shares (and the securities issuable,
directly or indirectly, upon conversion of the Shares, if any) shall be
imprinted with a legend in substantially the following form:

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT AN
EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN
OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL
THAT SUCH REGISTRATION IS NOT REQUIRED.

      4.3 COMPLIANCE WITH SECURITIES LAWS ON TRANSFER. This warrant and the
Shares issuable upon exercise of this warrant (and the securities issuable,
directly or indirectly, upon conversion of the Shares, if any) may not be
transferred or assigned in whole or in part without compliance with applicable
federal and state securities laws by the transferor and the transferee
(including, without limitation, the delivery of investment representation
letters and legal opinions reasonably satisfactory to the Company). The Company
shall not require Holder to provide an opinion of counsel if the transfer is to
an affiliate of Holder or if there is no material question as to the
availability of current information as referenced in Rule 144(c), Holder
represents that it has complied with Rule 144(d) and (e) in reasonable detail,
the selling broker represents that it has complied with Rule 144(f), and the
Company is provided with a copy of Holder's notice of proposed sale.

      4.4 TRANSFER PROCEDURE. Subject to the provisions of Section 4.3, Holder
may transfer all or part of this warrant or the Shares issuable upon exercise of
this warrant (or the securities issuable, directly or indirectly, upon
conversion of the Shares, if any) by giving the Company notice of the portion of
the warrant being transferred setting forth the name(s), address(es) and
taxpayer identification number(s) of the transferee(s) and surrendering this
warrant to the Company for reissuance of new warrants to (a) the transferee(s),
in such denomination as shall be requested by Holder, and (b) Holder, covering
the number of shares in respect of which the warrant shall not have been
transferred (if applicable); provided, however, that Holder may transfer all or
part of this warrant to its affiliates, including, without limitation, Comerica
Incorporated, at any time without notice to the Company, and such affiliate
shall then be entitled to all the rights of Holder under this warrant and any
related agreements, and the Company shall cooperate fully in ensuring that any
stock issued upon exercise of this warrant is issued in the name of the
affiliate that exercises the warrant. The terms and conditions of this warrant
shall inure to the benefit of, and be binding upon, the Company and the holders
hereof and their respective permitted successors and assigns. Unless the Company
is filing financial information with the SEC pursuant to the Securities Exchange
Act of 1934, the Company shall have the right to refuse to transfer any portion
of this warrant to any person who directly competes with the Company.

                                       5

<PAGE>

      4.5 NOTICES. All notices and other communications from the Company to the
Holder, or vice versa, shall be deemed delivered and effective when given
personally or mailed by first-clsss registered or certified mail, postage
prepaid, at such address as may have been furnished to the Company or the
Holder, as the case may be, in writing by the Company or such Holder from time
to time. All notices to the Holder shall be addressed as follows:

                Imperial Bank
                Attn: Warrant Administrator
                Emerging Growth Division
                P.O. Box 7279
                San Francisco, CA 94120-7279

      4.6 WAIVER. This warrant and any term hereof may be changed, waived,
discharged or terminated only by an instrument in writing signed by the party
against which enforcement of such change, waiver, discharge or termination is
sought.

      4.7 ATTORNEYS' FEES. In the event of any dispute between the parties
concerning the terms and provisions of this warrant, the party prevailing in
such dispute shall be entitled to collect from the other party all costs
incurred in such dispute, including reasonable attorneys' fees.

      4.8 GOVERNING LAW. This warrant shall be governed by and construed in
accordance with the laws of the State of Delaware, without giving effect to its
principles regarding conflicts of law.

                                      WEBSIDESTORY, INC.

                                      By: /s/ John Hentrich
                                         ---------------------------------------
                                      Name: John Hentrich
                                      Title: President & CEO, WebSideStory, Inc.

Authorized signatories under Corporate Resolutions to Borrow or an authorized
signer(s) under a resolution covering warrants must sign the warrant.

                                       6

<PAGE>

                                   APPENDIX 1

                               NOTICE OF EXERCISE

      1. The undersigned hereby elects to purchase____________shares of the
__________ stock of WEBSIDESTORY, INC., pursuant to the terms of the attached
warrant, and tenders herewith payment of the purchase price of such shares in
full.

      1. The undersigned hereby elects to convert the attached warrant into
shares in the manner specified in the warrant. This conversion is exercised with
respect to____________ of the shares covered by the warrant.

      [STRIKE PARAGRAPH THAT DOES NOT APPLY.]

      2. Please issue a certificate or certificates representing said shares in
the name of the undersigned or in such other name as is specified below:

         Imperial Bank
         Attn: Warrant Administrator
         Emerging Growth Division
         P.O. Box 7279
         San Francisco, CA 94120-7279

      3. The undersigned represents it is acquiring the shares solely for its
own account and not as a nominee for any other party and not with a view toward
the resale or distribution thereof except in compliance with applicable
securities laws.

IMPERIAL BANK or Registered Assignee

____________________________________________
(Signature)

____________________________________________
(Date)

<PAGE>

                                    EXHIBIT A

                                  IMPERIAL BANK
                             ANTI-DILUTION AGREEMENT

      THIS ANTI-DILUTION AGREEMENT is entered into as of April 30, 2001 by and
between IMPERIAL BANK ("Purchaser") and WEBSIDESTORY, INC. (the "Company").

                                    RECITALS

      A. Concurrently with the execution of this Anti-dilution Agreement, the
Purchaser is purchasing from the Company a Warrant to Purchase Stock (the
"Warrant") pursuant to which Purchaser has the right to acquire from the Company
the Shares (as defined in the Warrant).

      B. By this Anti-dilution Agreement, the Purchaser and the Company desire
to set forth the adjustment in the number of Shares issuable upon exercise of
the Warrant as a result of a Diluting Issuance (as defined below).

      C. Capitalized terms used herein shall have the same meaning as set forth
in the Warrant.

      NOW, THEREFORE, in consideration of the mutual promises, covenants and
conditions hereinafter set forth, the parties hereto mutually agree as follows:

      SECTION 1. DEFINITIONS. AS USED IN THIS ANTI-DILUTION AGREEMENT, THE
                 FOLLOWING TERMS HAVE THE FOLLOWING RESPECTIVE MEANINGS:

                        (a) "Option" means any right, option or warrant to
                 subscribe for, purchase or otherwise acquire common stock or
                 Convertible Securities.

                        (b) "Convertible Securities" means any evidences of
                 indebtedness, shares of stock or other securities directly or
                 indirectly convertible into or exchangeable for common stock.

                        (c) "Issue" means to grant, issue, sell, assume or fix a
                 record date for determining persons entitled to receive any
                 security (including Options) whichever of the foregoing is the
                 first to occur.

                        (d) "Additional Common Shares" means all common stock
                 (including reissued shares) Issued (or deemed to be issued
                 pursuant to Section 2) after the date of the Warrant.
                 Additional Common Shares does not include, however, any common
                 stock Issued in a transaction described in Sections 2.1 and
                 2.2 of the Warrant; any common stock Issued upon conversion of
                 preferred stock outstanding on the date of the Warrant; the
                 Shares; or common stock Issued as incentive or in a

<PAGE>

                 nonfinancing transaction to employees, officers, directors or
                 consultants to the Company.

                        (e) The shares of common stock ultimately Issuable upon
                 exercise of an Option (including the shares of common stock
                 ultimately Issuable upon conversion or exercise of a
                 Convertible Security Issuable pursuant to an Option) are
                 deemed to be Issued when the Option is Issued. The shares of
                 common stock ultimately Issuable upon conversion or exercise
                 of a Convertible Security (other than a Convertible Security
                 Issued pursuant to an Option) shall be deemed Issued upon
                 Issuance of the Convertible Security.

      SECTION 2. DEEMED ISSUANCE OF ADDITIONAL COMMON SHARES.

            The shares of common stock ultimately issuable upon exercise of an
Option (including the shares of common stock ultimately Issuable upon conversion
or exercise of a Convertible Security Issuable pursuant to an Option) are deemed
to be Issued when the Option is Issued. The shares of common stock ultimately
Issuable upon conversion or exercise of a Convertible Security (other than a
Convertible Security Issued pursuant to an Option) shall be deemed Issued upon
Issuance of the Convertible Security. The maximum number of shares of common
stock Issuable is determined without regard to any future adjustments permitted
under the instrument creating the Options or Convertible Securities.

      SECTION 3. ADJUSTMENT OF WARRANT PRICE FOR DILUTING ISSUANCES.

      3.1 Weighted Average Adjustment. If the Company issues Additional Common
Shares after the date of the Warrant and the consideration per Additional Common
Share (determined pursuant to Section 9) is less than the Warrant Price in
effect immediately before such Issue (a "Diluting Issuance"), other than with
respect to shares issued to (a) the Company's employees, officer or directors in
connection with their employment or retention of services not to exceed the
number of Shares reserved in the Company's existing equity financing plans, or
(b) customers or vendors in connection with bona fide business transactions, the
Warrant Price in effect immediately before such Issue shall be reduced,
concurrently with such Issue, to a price (calculated to the nearest hundredth of
a cent) determined by multiplying the Warrant Price by a fraction:

            (a)   the numerator of which is the number of shares of common stock
                  outstanding immediately before such Issue plus the number of
                  shares of common stock that the aggregate consideration
                  received by Company for the Additional Common Shares would
                  purchase at the Warrant Price in effect immediately before
                  such Issue, and

            (b)   the denominator of which is the number of shares of common
                  stock outstanding immediately before such Issue plus the
                  number of such Additional Shares.

<PAGE>

      (3.2) Adjustment of Number of Shares. Upon each adjustment of the Warrant
Price, the number of Shares Issuable upon exercise of the Warrant shall be
increased to equal the quotient obtained by dividing (a) the product resulting
from multiplying (i) the number of Shares Issuable upon exercise of the Warrant
and (ii) the Warrant Price, in each case as in effect immediately before such
adjustment, by (b) the adjusted Warrant Price.

      3.3 Securities Deemed Outstanding. For the purpose of this Section 3, all
securities Issuable upon exercise of any outstanding Convertible Securities or
Options, Warrants, or other rights to acquire securities of the Company shall be
deemed to be outstanding.

      SECTION 4. NO ADJUSTMENT FOR ISSUANCES FOLLOWING DEEMED ISSUANCES.

      No adjustment to the Warrant Price shall be made upon the exercise of
Options or conversion of Convertible Securities.

      SECTION 5. ADJUSTMENT FOLLOWING CHANGES IN TERMS OF OPTIONS OR CONVERTIBLE
                 SECURITIES.

      If the consideration payable to, or the number of shares of common stock
Issuable by, the Company increases or decreases, respectively, pursuant to the
terms of any outstanding Options or Convertible Securities, the Warrant Price
shall be recomputed to reflect such increase or decrease. The recomputation
shall be made as of the time of the Issuance of the Options or Convertible
Securities. Any changes in the Warrant Price that occurred after such Issuance
because other Additional Common Shares were Issued or deemed Issued shall also
be recomputed.

      SECTION 6. RECOMPUTATION UPON EXPIRATION OF OPTIONS OR CONVERTIBLE
                 SECURITIES.

      The Warrant Price computed upon the original Issue of any Options or
Convertible Securities, and any subsequent adjustments based thereon, shall be
recomputed when any Options or rights of conversion under Convertible Securities
expire without having been exercised. In the case of Convertible Securities or
Options for common stock, the Warrant Price shall be recomputed as if the only
Additional Common Shares Issued were the shares of common stock actually Issued
upon the exercise of such securities, if any, and as if the only consideration
received therefor was the consideration actually received upon the Issue,
exercise or conversion of the Options or Convertible Securities. In the case of
Options for Convertible Securities, the Warrant Price shall be recomputed as if
the only Convertible Securities Issued were the Convertible Securities actually
Issued upon the exercise thereof, if any, and as if the only consideration
received therefor was the consideration actually received by the Company
(determined pursuant to Section 9), if any, upon the Issue of the Options for
the Convertible Securities.

      SECTION 7. LIMIT ON READJUSTMENTS.

      No readjustment of the Warrant Price pursuant to Sections 5 or 6 shall
increase the Warrant Price more than the amount of any decrease made in respect
of the Issue of any Options or Convertible Securities.

<PAGE>

      SECTION 8. 30 DAY OPTIONS.

      In the case of any Options that expire by their terms not more than 30
days after the date of Issue thereof, no adjustment of the Warrant Price shall
be made until the expiration or exercise of all such Options.

      SECTION 9. COMPUTATION OF CONSIDERATION.

      The consideration received by the Company for the Issue of any Additional
Common Shares shall be computed as follows:

                        (a) Cash shall be valued at the amount of cash received
                  by the Corporation, excluding amounts paid or payable for
                  accrued interest or accrued dividends.

                        (b) Property. Property, other than cash, shall be
                  computed at the fair market value thereof at the time of the
                  Issue as determined in good faith by the Board of Directors of
                  the Company.

                        (c) Mixed Consideration. The consideration for
                  Additional Common Shares Issued together with other property
                  of the Company for consideration that covers both shall be
                  determined in good faith by the Board of Directors.

                        (d) Options and Convertible Securities. The
                  consideration per Additional Common Share for Options and
                  Convertible Securities shall be determined by dividing:

                              (i) the total amount, if any, received or
                        receivable by the Company for the Issue of the Options
                        or Convertible Securities, plus the minimum amount of
                        additional consideration (as set forth in the
                        instruments relating thereto, without regard to any
                        provision contained therein for a subsequent adjustment
                        of such consideration) payable to the Company upon
                        exercise of the Options or conversion of the Convertible
                        Securities, by

                              (ii) the maximum number of shares of common stock
                        (as set forth in the instruments relating thereto,
                        without regard to any provision contained therein for a
                        subsequent adjustment of such number) ultimately
                        Issuable upon the exercise of such Options or the
                        conversion of such Convertible Securities.

<PAGE>

      SECTION 10. GENERAL.

      10.1 Governing Law. This Anti-dilution Agreement shall be governed in all
respects by the laws of the State of Delaware as such laws are applied to
agreements between Delaware residents entered into and to be performed entirely
within Delaware.

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

      10.3 Entire Agreement. Except as set forth below, this Anti-dilution
Agreement and the other documents delivered pursuant hereto constitute the full
and entire understanding and agreement between the parties with regard to the
subjects hereof and thereof.

      10.4 Notices, etc. All notices and other communications required or
permitted hereunder shall be in writing and shall be mailed by first class mail,
postage prepaid, certified or registered mail, return receipt requested,
addressed (a) if to Purchaser at Purchaser's address as set forth below, or at
such other address at Purchaser shall have furnished to the Company in writing,
or (b) if to the Company, at the Company's address set forth below, or at such
other address as the Company shall have furnished to the Purchaser in writing.

      10.5 Severabilty. In case any provision of this Anti-dilution Agreement
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions of this Anti-dilution Agreement shall
not in any way be affected or impaired thereby.

      10.6 Titles and Subtitles. The titles of the sections and subsections of
this Agreement are for convenience of reference only and are not to be
considered in construing this Anti-dilution Agreement.

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

PURCHASER:                            ISSUER:

IMPERIAL BANK                         WEBSIDESTORY, INC.

By: /s/ Scott R. Foote                By: /s/ John Hentrich
   -----------------------------         ---------------------------------------
Name: Scott R. Foote                  Name: John Hentrich
Title: AVP                            Title: President & CEO, WEBSIDESTORY, Inc.
Address: 11512 EL Camino Real # 350   Address: 10182 Telesis Caurt
         San Diego CA 92130                    San Diego, CA 92121