Document:

EXHIBIT 10.24

To: BACKWEB TECHNOLOGIES LTD. (the "HOLDER")

Date: August 6, 2001                                           Warrant No. B1-6

                          SERIES B1 WARRANT CERTIFICATE

              to Convert a debt into Series B1 Preferred Shares of

                                   EMONY LTD.

                              VOID AFTER 24:00 p.m.
              On the last day of the Warrant Period (defined below)

This is to certify that the Holder is entitled to purchase by way of conversion,
subject to the provisions of this Warrant, from Emony Ltd. (the "COMPANY"),
Series B1 Preferred Shares of the Company ("PREFERRED SHARES"), at such times,
conversion rate and amounts and subject to such terms and conditions as set
forth below.

1.      WARRANT PERIOD

        This Warrant may be exercised at any time, in whole, from the date
hereof and until immediately prior to the closing of one or more investment
transactions with aggregate net cash proceeds to the Company (excluding the
amount of the conversion hereunder and excluding the amount of any other debt
converted at such time into equity) of at least five million U.S. dollars
(U.S.$5,000,000) at a price per share of at least the Conversion Price, as
defined below (the "QUALIFYING INVESTMENT") (such period, the "WARRANT PERIOD"):

2.      WARRANT SHARES AND CONVERSION PRICE

        The Holder is entitled to purchase by way of conversion, up to such
number of Preferred Shares being the outcome of DIVIDING any un-repaid amount of
a loan granted by the Holder to the Company pursuant to a certain Convertible
Loan Agreement among the Company and certain lenders (the "CONVERTIBLE LOAN
AGREEMENT"), in a principle amount of US$500,000.00 (Five hundred thousand U.S.
Dollars) ("LOAN AMOUNT") bearing an interest at the rate of LIBOR for 6 month
loans as quoted by Bank Leumi LeIsrael Ltd. plus 1.5% (one and a half percent)
per annum, compounded monthly, commencing at the date of grant of the Loan
Amount and computed on the basis of a 365-day year for the actual number of days
elapsed (the "INTEREST", and together with the Loan Amount shall be referred to
as the "WARRANT AMOUNT"), by a conversion price of US$1.034 (one US Dollar three
cents and four tenths of a cent) (the "CONVERSION PRICE"), subject to
adjustments in the Conversion Price as a result of stock splits and/or
distribution of bonus shares and/or as otherwise set below (the "WARRANT
SHARES").

3.      EXERCISE OF WARRANT

        (a) EXERCISE. Subject to the provisions hereof, this Warrant may be
exercised at any time in whole during the Warrant Period. This Warrant shall be
exercised by notice to the Company, and presentation and surrender hereof to the
Company at the principal office of the Company, accompanied by a written notice
of exercise (the "NOTICE") specifying the number of Warrant Shares subject to
the Notice and the applicable Warrant Amount and Conversion Price. Such notice
shall become effective when given (the "EFFECTIVE DATE"), provided, however that
if this Warrant is being exercised prior to a Qualifying Investment, such
exercise may be conditioned upon the occurrence of a Qualifying Investment such
that if the Qualifying Investment does not occur within 30 days thereafter such
notice of exercise shall be deemed null and void and the Warrant shall continue
in full force and effect.
<PAGE>

        (b) ISSUANCE OF THE WARRANT SHARES. Upon presentation and surrender of
the Notice, the Company shall issue promptly to the Holder (and no later than 14
days from receipt of a Notice) the Preferred Shares to which the Holder is
entitled thereto.

        (c) Upon receipt by the Company of the Notice, the Holder shall be
deemed to be the Holder of the Preferred Shares issuable upon such exercise,
notwithstanding that the share transfer books of the Company shall then be
closed and that certificates representing such Preferred Shares shall not then
be actually delivered to the Holder. The Company shall pay all taxes and other
charges that may be payable in connection with the issuance of the Preferred
Shares and the preparation and delivery of share certificates pursuant to this
Section 3 in the name of the Holder, but shall not pay any taxes payable by the
Holder by virtue of the holding, issuance, exercise or sale of this Warrant or
the Preferred Shares by the Holder.

        (d) No fractions of Preferred Shares shall be issued in connection with
the exercise of this Warrant, and the number of Preferred Shares issued shall be
rounded to the nearest whole number.

        (e) The Company covenants that the Preferred Shares issuable hereunder,
when issued and allotted in accordance with this Warrant, and the Ordinary
Shares issuable upon conversion of such Preferred Shares, will be duly
authorized, validly issued, fully paid, non-assessable and free of preemptive or
similar rights; will have the rights, preferences and privileges set forth in
the Articles of Association of the Company; will be free and clear of any
pledges, liens, claims, encumbrances or third party rights of any kind, and duly
registered in the name of the Holder in the Company's shareholders register.

4.      RESERVATION OF SHARES; PRESERVATION OF RIGHTS OF HOLDER

        The Company hereby agrees that at all times it will maintain and
reserve, free from pre-emptive rights, such number of authorized but un-issued
Preferred Shares so that this Warrant may be exercised without additional
authorization of Preferred Shares after giving effect to all other warrants,
options, convertible securities and other rights to acquire shares of the
Company. The Company further agrees that it will not, by charter amendment or
through reorganization, consolidation, merger, dissolution or sale of assets, or
by any other voluntary act, avoid or seek to avoid the observance or performance
of any of the covenants, stipulations or conditions to be observed or performed
hereunder by the Company.

5.      LOSS OF WARRANT

        Upon receipt by the Company of evidence reasonably satisfactory to it of
the loss, theft, destruction or mutilation of this Warrant, and (in the case of
loss, theft or destruction) of reasonably satisfactory indemnification, and upon
surrender and cancellation of this Warrant, if mutilated, the Company will
execute and deliver a new Warrant of like tenor and date. Any such new Warrant
executed and delivered shall constitute an additional contractual obligation on
the part of the Company, whether or not the Warrant so lost, stolen, destroyed
or mutilated shall be at any time enforceable by anyone.

6.      ADJUSTMENT

        The number of Preferred Shares purchasable upon the exercise of this
Warrant and the Conversion Price shall be subject to adjustment from time to
time or upon exercise as provided in this Section 6:

        (a) If, during the Warrant Period, the Company shall make a dividend or
other distribution of Company's securities to the current holders of Ordinary
Shares (i.e. bonus shares), the number of the Preferred Shares purchasable upon
exercise of this Warrant shall be increased by multiplying such number of shares
by a fraction of which the denominator shall be the number of Ordinary Shares
(on an as converted basis) outstanding at the close of business on the day
immediately preceding the date of such distribution and the numerator shall be
the sum of such number of shares and the total number of bonus shares, such
increase to become effective immediately after the opening of business on the
date following such distribution, and upon the happening of such an event the
Conversion Price shall be adjusted appropriately.

<PAGE>

        (b) If, during the Warrant Period, the outstanding Ordinary Shares shall
be subdivided into a greater number of Ordinary Shares, the number of the
Preferred Shares purchasable upon exercise of this Warrant at the opening of
business on the day following the day upon which such subdivision becomes
effective shall be proportionately increased, and, conversely, if outstanding
Ordinary Shares shall be combined into a smaller number of Ordinary Shares, the
number of the Preferred Shares purchasable upon exercise of this Warrant at the
opening of business on the day following the day upon which such combination
becomes effective shall be proportionately decreased, such increase or decrease,
as the case may be, to become effective immediately after the opening of
business on the day following the day upon which such subdivision or combination
becomes effective, and in each case the Conversion Price shall be adjusted
appropriately.

        (c) If during the Warrant Period, the Company closes one or more
issuances or equity securities on terms (including, without limitation, as to
price) more favorable to the investors than the terms of the conversion herein,
then the Holder shall be entitled to such more favorable terms as to the
conversion hereunder.

        (d) In the event of a merger or sale of all or substantially all of the
shares or assets of the Company during the Warrant Period, the Holder shall be
entitled to convert the Warrant Amount into the most senior class of shares of
the Company at a price per share to be based on a pre-money valuation of the
Company equal to the lower of: (i) the pre-money valuation for purposes of the
merger or sale of all or substantially all the shares or assets of the Company,
or (ii) a conversion price of U.S.$1.04 (one U.S. Dollar and four cents) per
share.

        Nothing herein shall in any way or manner limit or derogate from any
other adjustments of the conversion ratio of the Preferred Shares into Ordinary
Shares of the Company or the Warrant Shares as set forth in the Company's
Articles of Association.

7.      NOTICE

        Whenever the Holder shall request in writing, the Company shall promptly
compute the number of Preferred Shares purchasable hereunder and mail to the
Holder at the last address provided to the Company in writing a certificate,
signed by a principal financial officer of the Company, setting forth the number
of Preferred Shares for which this Warrant is exercisable and the Conversion
Price thereof.

8.      RIGHTS OF THE HOLDER

        (i)     Without limiting the foregoing or any remedies available to the
                Holder, the Holder will be entitled to specific performance of
                the obligations hereunder, and injunctive relief against actual
                or threatened violations of the obligations of any person
                subject to this Warrant.

        (ii)    The Holder shall not, by virtue hereof, be entitled to any
                rights of a shareholder in the Company.

        (iii)   If at any time the Company shall adopt a resolution regarding
                its liquidation, dissolution or winding up, this Warrant, at the
                holder's sole discretion, shall be deemed to have been
                exercised, and the Warrant Shares issued pursuant hereto, prior
                to such resolution.

9.      REGISTRATION RIGHTS

        Upon exercise of this Warrant, the Holder shall have and be entitled to
exercise the rights of registration granted under that certain Registration
Rights Agreement between the Company, the Holder and the other parties named
therein, dated October 10th, 2000, with respect to the Preferred Shares issued
on exercise of this Warrant and the Ordinary Shares obtained upon conversion of
such Preferred Shares.

<PAGE>

10.     INVESTMENT REPRESENTATION

        Neither this Warrant nor the Warrant Shares issuable upon the exercise
of this Warrant have been registered under the Securities Act of 1933, as
amended (the "SECURITIES ACT"), or any other securities laws. The Holder
acknowledges by acceptance of the Warrant that (a) it has acquired this Warrant
for investment and not with a view to distribution; and (b) it is an accredited
investor as that term is defined in Regulation D promulgated under the
Securities Act. The Holder agrees that any Warrant Shares issuable upon exercise
of this Warrant will be acquired for investment and not with a view to
distribution and such Warrant Shares will not be registered under the Securities
Act and applicable state securities laws and that such Warrant Shares may have
to be held indefinitely unless they are subsequently registered or qualified
under the Securities Act and applicable state securities laws, or based on an
opinion of counsel reasonably satisfactory to the Company, an exemption from
such registration and qualification is available. The Holder, by acceptance
hereof, consents to the placement of legend(s) on all securities hereunder as to
the applicable restrictions on transferability in order to ensure compliance
with the Securities Act, unless in the opinion of counsel for the Company such
legend is not required in order to ensure compliance with the Securities Act.
The Company may issue stop transfer instructions to its transfer agent in
connection with such restrictions.

11.     TERMINATION

        This Warrant and the rights conferred hereby shall terminate (save for
the right of registration granted with respect to shares obtained on the
exercise of this Warrant pursuant to Section 9 above) at the aforementioned time
on the last day of the Warrant Period, 24:00.

12.     GOVERNING LAW

        This Warrant shall be governed by, and interpreted in accordance with,
the laws of the state of Israel, without giving effect to the rules respecting
conflict of law, and the parties hereto irrevocably submit to the exclusive
jurisdiction of the courts of Tel Aviv in respect of any dispute or matter
arising out of or connected with this Warrant.

13.     TRANSFER AND ASSIGNMENT

        This Warrant and the rights, privileges and obligations conferred hereby
shall be transferable and assignable by the Holder, at its discretion, subject
only to limitations set forth in the Company's Articles of Association and in
the Convertible Loan Agreement. If this Warrant should be transferred in part
only, the Company shall, upon surrender of this Warrant for cancellation,
together with funds sufficient to pay any required transfer tax, cause to be
delivered to the Holder and to the transferee without charge new Warrant
Certificates of like tenor with this Warrant in the respective names of the
Holder and of the transferee, evidencing, separately, the rights of the Holder
and the rights of the transferee to purchase their respective shares of the
Common Shares purchasable hereunder.

Date: 6-8-2001

      /s/ SHARON PELEG
      ------------------------

      EMONY LTD.

      By:    Sharon Peleg
             ---------------------------
      Name:
             ---------------------------
      Title: CTO
             ---------------------------<PAGE>
                                                                   EXHIBIT 10.25

                                PROMISSORY NOTE

$500,000.00                                                     Tel Aviv, Israel

                                                                  August 6, 2001

     FOR VALUE RECEIVED, Emony Ltd., an Israeli private company (Reg. No.
51-260506-4) ("MAKER") hereby promises to pay to the order of Backweb
Technologies Ltd., or its successors or assigns, as the case may be ("PAYEE"),
at Payee's principal place of business, or such other place as may be specified
in writing by Payee, the principal sum of Five hundred thousand U.S. Dollars
($500,000.00), plus interest on the unpaid principal balance outstanding hereon
from the date hereof at a rate of LIBOR for 6 month loans as quoted by Bank
Leumi LeIsrael Ltd. plus 1.5% (one and a half percent) per annum, compounded
monthly based on a three hundred and sixty-five day year.

     This note shall be due and payable on September 30, 2002 (unless postponed
with the prior written consent of the Payee).

     Maker shall not have the right to prepay all or any part of this
promissory note without the prior written consent of the Payee.

     Maker hereby waives presentment for payment, notice of dishonor, protest
and notice of protest and, in the event of default hereunder, Maker agrees to
pay all costs of collection, including reasonable attorney's fees.

     This promissory note is issued under the terms and provisions of the
convertible loan agreement between Maker and Payee, effective August 6, 2001
(the "LOAN AGREEMENT"). The holder hereof is entitled to all of the benefits and
subject to all of the obligations provided for in said Loan Agreement, or
referred to in said Loan Agreement, including conversion hereof as provided
under Section 3 thereof. Reference is made to the Loan Agreement for a statement
of the terms and conditions under which this indebtedness was incurred
(including conversion, waiver, etc.) and the events of default under which the
due date of this promissory note may be accelerated. The provisions of the Loan
Agreement are incorporated by reference herein with the same force and effect as
if fully set forth herein.

     This promissory note shall be governed by the laws of the state of Israel.

     IN WITNESS WHEREOF, Maker has executed this promissory note as of the date
first above written.

                                                            Emony Ltd.

                                                            By /s/ SHARON PELEG
                                                              -----------------
                                                            Name  Sharon Peleg
                                                                ---------------

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