Filed Pursuant to Rule 424(b)(5)
                                                              File No. 333-46192


PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED June 1, 2001)

                             Commtouch Software Ltd.

                             315,789 Ordinary Shares


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

         Commtouch  Software Ltd. is offering  315,789 of its ordinary shares to
Rideau Ltd. pursuant to a purchase agreement with Rideau.

         The  shares  are being  sold at an  average  price of $1.056  per share
($333,000 in aggregate  gross  proceeds)  based on recent  trading prices of our
shares on the Nasdaq National Market, less a discount of 10% (aggregate discount
of $33,000)  or $0.106 per share.  We will  receive  aggregate  net  proceeds of
$300,000. See "Offer Statistics and Expected Timetable" beginning on page S-3 of
this prospectus supplement.

         The shares are quoted on the Nasdaq  National  Market  under the symbol
"CTCH."  On May 31,  2001,  the  closing  sale price of the shares was $1.04 per
share.

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

         This  investment  involves  a high  degree  of risk.  See Risk  Factors
beginning on page 7 of the prospectus attached to this prospectus supplement.

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

         Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus  is truthful or  complete.  Any  representation  to the contrary is a
criminal offense.


         The date of this prospectus supplement is June 1, 2001.







                                TABLE OF CONTENTS

About this Prospectus Supplement.............................................S-2
Special Note Regarding Forward-Looking Information...........................S-2
The Offering.................................................................S-3
Offer Statistics and Expected Timetable......................................S-3
Dilution.....................................................................S-5


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

                        ABOUT THIS PROSPECTUS SUPPLEMENT

         Unless  otherwise  indicated,   all  references  in  this  document  to
"Commtouch,"  "the Company," "we," "us" or "our" are to Commtouch  Software Ltd.
or its wholly-owned and majority-owned  subsidiaries,  Commtouch Inc., Commtouch
(UK) Ltd,  Commtouch Latin America Inc., Wingra  Technologies Inc. and Commtouch
K.K. (Japan).

         This prospectus  supplement and the attached  prospectus are parts of a
registration statement that we filed with the Securities and Exchange Commission
under which we may sell up to 4,000,000  of our  ordinary  shares in one or more
offerings. The prospectus provides general information about us and our proposed
ongoing offering of the 4,000,000 shares.  This prospectus  supplement  provides
specific  information about the offering of 117,180 shares to Rideau. You should
read both this prospectus supplement and the prospectus carefully.


               SPECIAL NOTE REGARDING FORWARD-LOOKING INFORMATION

         This document  contains  forward-looking  statements that involve risks
and  uncertainties.  These  statements  relate to our future plans,  objectives,
beliefs,   expectations  and  intentions.   In  some  cases,  you  can  identify
forward-looking statements by our use of words such as "expects," "anticipates,"
"believes," "intends," "plans," "seeks" and "estimates" and similar expressions.
Our actual results,  levels of activity,  performance or achievements may differ
materially from those expressed or implied by these forward-looking  statements.
Factors  that could  cause or  contribute  to these  differences  include  those
discussed in our Annual Report on Form 20-F,  as amended,  which is on file with
the Securities and Exchange Commission.




                                      S-2



                                  THE OFFERING


Ordinary shares offered .....................................     315,789 shares
Ordinary shares outstanding after the offering ..............  17,563,117 shares

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

         Except as stated in the Consolidated  Financial  Statements and related
Notes  incorporated  by reference  into the  prospectus  and except as otherwise
specified in this prospectus  supplement and the prospectus,  all information in
this  prospectus  supplement and the prospectus is based on the number of shares
outstanding as of March 31, 2001, and:

         o        assumes the issuance of 276,744  ordinary shares issuable upon
                  exercise  of  options   granted  to  executive   officers  and
                  directors  within  60 days of  March  31,  2001 at a  weighted
                  average exercise price of $19.21 per share.

         o        with  respect to  financial  information,  is reported in U.S.
                  dollars;

and does not include:

         o        1,598,239   ordinary   shares   issuable  to   employees   and
                  consultants  upon  exercise of  outstanding  options under our
                  stock option plans and stock option agreements as of March 31,
                  2001 at a weighted average exercise price of $19.36 per share;
                  and

         o        1,878,067  ordinary  shares  available  for  future  grant  or
                  issuance under our stock option and stock purchase plans as of
                  March 31, 2001.



                     OFFER STATISTICS AND EXPECTED TIMETABLE

         Commtouch has entered into an agreement  under which it will sell up to
$300,000 in market  value of it ordinary  shares at a discount to Rideau Ltd., a
Bahamian corporation.

         The price  Rideau will pay for these  shares is  $0.95. Settlement will
occur within two business days.


                                      S-3


         Rideau's  obligation  to  purchase  shares is subject to the  following
conditions, among others:

         o        Our  ordinary  shares  continue  to be  traded  on the  Nasdaq
                  National Market.

         o        Trading in  securities  generally  as  reported  by the Nasdaq
                  National  Market has not been  suspended  or  limited,  and no
                  minimum prices have been  established on securities  traded on
                  the American Stock Exchange or the New York Stock Exchange.

         o        The  registration  statement  under which the shares are to be
                  sold must  remain  effective  and we must have  enough  unsold
                  registered shares to deliver to Rideau.

         o        There has not been a material  adverse effect on our business,
                  operations, properties, or financial condition.

At any given time, we might not be able to satisfy all of these  conditions.  If
not, we would likely need to raise money from other sources in order to continue
to fund our operations.  Such alternative funding might not be available.  Also,
we cannot  put  shares to Rideau at a time when we have not  publicly  disclosed
material information about us.

         We also agreed to indemnify  Rideau,  and it agreed to indemnify us, in
the event either of us suffers  specified  losses or  liabilities  in connection
with actions of the other related to sales under the purchase  agreement and the
registration statement.

         The shares  issuable to Rideau are freely  tradable  and will come from
the 4,000,000  shares we previously  registered  under a registration  statement
declared  effective by the Securities and Exchange  Commission in December 2000.

         Our  arrangements  with Rideau do not affect our equity  line  purchase
agreement  with  Torneaux,  which  remains in full force and effect.  Under that
agreement  Torneaux  agreed to invest in our ordinary  shares provided the share
price is above $2 or a lower amount if mutually agreed.  Recently,  our ordinary
shares have been trading at below that price.

                                      S-4


         The  settlement  and issuance of shares to Rideau will occur on June 4,
2001. At that time, we will issue 315,789 shares to Rideau. The shares are being
sold at an  average  price of $1.056  per share  ($333,000  in  aggregate  gross
proceeds)  based on recent trading  prices of our shares on the Nasdaq  National
Market,  less a discount  of 10%  (aggregate  discount of $33,000) or $0.106 per
share. We will receive net proceeds of $300,000.

         Status as Underwriter. Rideau is an "underwriter" within the meaning of
the  Securities  Act in  connection  with the share  purchase  described  above.
Broker-dealers  or other persons acting on behalf of Rideau or on behalf of each
other  that  participate  in the  distribution  of the shares may also be deemed
underwriters.  Any  commissions  or  profits  they  receive on the resale of the
shares may be deemed to be  underwriting  discounts  and  commissions  under the
Securities  Act.  Rideau's  address  is  Rideau  Ltd.,  c/o  Eurodutch  Company,
Charlotte House, Charlotte Street, Nassau, Bahamas Attn: Dierdre McCoy.


                                    DILUTION

         Our net tangible  book value as of March 31, 2000 was $30.1  million or
$1.74 per ordinary  share.  Net tangible  book value per share is  determined by
dividing the amount of our total tangible  assets less total  liabilities by the
number of ordinary shares  outstanding at that date.  Dilution/accretion  in net
tangible book value per share  represents the difference  between the amount per
share  paid by  purchasers  of  ordinary  shares  in this  offering  and the net
tangible book value per ordinary share  immediately after the completion of this
offering.

         After giving effect to our sale to Rideau of 315,789 ordinary shares at
a price of $0.95 per share and after deducting our estimated  offering expenses,
the pro forma net tangible  book value of Commtouch at March 31, 2001 would have
been $30.4 million, or $1.73 per share. This represents an immediate decrease in
pro forma as adjusted net tangible book value of $0.01 per share to the existing
shareholders  and an  immediate  accretion  of $0.78 per share to new  investors
purchasing  ordinary shares in this offering.  The following  table  illustrates
this per-share dilution:


Offering price per share.....................................   $    0.95

Net tangible book value per share as of March 31, 2001.......   $    1.74
Decrease in pro forma as adjusted net tangible book
         value per share attributable to this offering.......   $    0.01
Pro forma as adjusted net tangible book value per
         share after the offering............................   $    1.73

Accretion per share to new investors.........................   $    0.78


                                      S-5


The above table assumes no exercise of options after March 31, 2001. As of March
31, 2001, there were outstanding  options to purchase a total 2,476,919 ordinary
shares under our stock option plans and option agreements with our employees and
consultants,  and  executive  officers  and  directors,  at a  weighted  average
exercise price of $19.10 per share, and 1,878,067  ordinary shares available for
future grant under our stock option grants. If all of these outstanding  options
had been  exercised on March 31, 2001,  our pro forma net tangible book value on
that date would have been $77.7 million, or $3.93 per share, the increase in net
tangible book value per share  attributable to the existing investors would have
been  $2.20  per share  and the  accretion  in net  tangible  book  value to new
investors would have been $2.98 per share.

                                      S-6


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




Commtouch Software Ltd.

4,000,000 Ordinary Shares


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


With this prospectus,  we may offer up to 4,000,000 of our ordinary  shares.  We
will provide  specific  terms for each offer and sale of the ordinary  shares in
supplements to this prospectus. You should read this prospectus and the relevant
prospectus  supplement  carefully before  investing in our ordinary shares.  The
ordinary  shares  are  quoted on the  Nasdaq  National  Market  under the symbol
"CTCH." On May 30, 2001, the closing sale price of the ordinary shares was $1.02
per share.















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

     This investment involves risk. See "Risk Factors" beginning on page 7.

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

Neither  the  Securities  and  Exchange  Commission  nor  any  state  securities
Commission has approved of anyone's investment in these securities or determined
if this prospectus is truthful or complete.  Any  representation to the contrary
is a criminal offense.


                   The date of this Prospectus is May 31, 2001



                                TABLE OF CONTENTS


                                                                            Page
                                                                           -----
Summary ....................................................................   1
Risk Factors ...............................................................   4
The Offer and Listing.......................................................  17
Reasons for Offer Use of Proceeds ..........................................  18
Description of Share Capital ...............................................  19
Shares Eligible for Future Sale ............................................  23
Plan of Distribution .......................................................  24
Legal Matters ..............................................................  27
Experts ....................................................................  27
Where You Can Find More Information ........................................  27
Information Incorporated by Reference ......................................  28
Enforceability of Civil Liabilities ........................................  28






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

                                     SUMMARY


Unless  otherwise  indicated,  all references in this prospectus to "Commtouch,"
"the  Company,"  "we,"  "us" or "our"  are to  Commtouch  Software  Ltd.  or its
wholly-owned and  majority-owned  subsidiaries,  Commtouch Inc.,  Commtouch (UK)
Ltd,  Commtouch Latin America Inc., Wingra  Technologies Inc. and Commtouch K.K.
(Japan).



Commtouch


We are a leading global provider of outsourced email and messaging  solutions to
small,  medium and large  enterprises  and their service  providers,  as well as
internet-centric organizations including web portals and web sites.

Our main  target  customers  include  companies  that  specialize  in  providing
communications  applications  to  enterprises:   ASPs,  ISPs,  telecoms,  CLECs,
wireless carriers, data centers, systems integrators, and IT consultants.

Email and  messaging is complex and  requires  focus to  implement,  deliver and
maintain.  Today's  robust  solutions  include:  the  ability  to  address  both
front-end and back-end requirements,  anytime-anywhere access, and features such
as anti-virus protection, unified messaging, calendaring, group scheduling, file
sharing,  and collaboration.  Technologies for the future are necessitating that
email and messaging adapt and change with the new  innovations.  With outsourced
email and messaging being less expensive to construct and maintain than in-house
"build"  solutions,  and with IT developers and  administrators in short supply,
and companies  needing to focus resources on their area of core  expertise,  the
demand for outsourced  email and messaging has  proliferated in the last several
years. Our flexible technology and economies of scale enable us to provide email
solutions in a cost-effective manner, allowing businesses to achieve significant
economic advantages. As rapid time to market is often critical to our customers,
our reputation for quick deployment is a significant advantage in the outsourced
email and marketing industry. Additionally, we provide comprehensive maintenance
and  administration  of our email  services,  which  eliminates the need for our
customers to undertake the  significant  burden of developing and maintaining an
in-house email system.

With 10 years of experience in email and messaging and providing  services in 26
languages in 180 countries, we have proven that our solutions, which utilize the
cost-efficient  Microsoft NT(R)  platform,  are quickly  deliverable,  scalable,
reliable, and integrate well with a variety of communications  applications that
enterprises  view as critical to providing them with a mission  critical service
and competitive advantage in the marketplace.

In addition to providing the  infrastructure  and software for  enterprise-grade
email and messaging solutions, we are also a service-driven  company,  providing
24/7 management for the customer,  either remotely or onsite. We offer a variety
of professional services to enterprises: facilitating the transition from legacy
email and messaging  systems to new, advanced systems (via our subsidiary Wingra
Technologies);  integrating  email  and  messaging  with  such  applications  as
wireless communications,  video and audio communications, and customer relations
management;  and allowing  for unified  communications  in which email,  instant
messaging,   voice,  and  other  data  communications  are  accessible  anytime,
anywhere.

We are  recognized  as one of the few  companies  with the depth and  breadth of
expertise  in email and  messaging.  We  currently  partner  with a  variety  of
organizations. We provide service level agreements (SLAs) for our customers that
use our enterprise-grade email and messaging solutions.

We offer  outsourced  anytime-anywhere  email and  messaging  solutions to three
segments of the market:


         Large enterprises and their service providers

         o Hosted Exchange

                  o  Our  carrier-grade   messaging  and  collaboration  hosting
                  service enables small and medium enterprises and their service
                  providers to create,  store and share information,  as well as
                  act on that information with speed and intelligence.

                  o  Our   service   is  built  on   top-quality-hardware.   The
                  Microsoft(R)  Exchange  Hosting service  includes the complete
                  management  and monitoring of systems,  technical  support and
                  comes with a 99.5% availability guarantee.

                  o Our users benefit from McAfee(TM)  virus protection and spam
                  blocking, full Outlook functionality, and enhanced Outlook Web
                  Access   as  well  as   public   folders.   Another   feature,
                  xManage(TM),   a   Commtouch   developed,   secure   web-based
                  administration tool, is brandable for resellers.

                  o xManage is a web-based service management tool that provides
                  enterprises and resellers the ability to enable  end-customers
                  and users to  self-administer  their otherwise  complex hosted
                  Exchange  environments without training,  support or technical
                  knowledge.   xManage  is  the  industry's   leading  tool  for
                  delivering   Total  Cost  of   Ownership   (TCO)   savings  to
                  corporations,  as well as speed to market and  customer  value
                  for new Exchange 2000 hosting resellers.

                  o Our optional  services include VPN (virtual private network)
                  support,  a 99.9%  high-availability  Service Level  Agreement
                  (SLA) and automated mail migration via Exchange  Migrator(TM),
                  built by our subsidiary Wingra.

                  o Our growing list of advanced  features that are scheduled to
                  be rolled out during 2001  include  wireless  access,  content
                  filtering and policy management,  as well as unified messaging
                  features.

         Service Providers Targeted at Small and Medium Size Enterprises

                  o Our Service Provider  Solution enables service  providers to
                  easily manage the email and messaging  features/services  that
                  they in turn  provide  to their end  users,  mainly  small and
                  medium size enterprises. Our solution provides:

                           o Anytime,  anywhere access to accounts from standard
                           desktop  email  clients  (e.g.   Microsoft   Outlook,
                           Qualcomm Eudora, or Netscape Messenger), Web browsers
                           and  wireless  devices,  such as  WAP-enabled  mobile
                           phones.

                           o Message  notification on an advanced  platform,  to
                           pagers,  mobile phones,  instant messengers and other
                           email addresses.

                           o  Integrated,   Web-based  applications,   including
                           calendar, task manager,  contact center, notes, short
                           message service (SMS), and more.

                           o Customization  of the Web email client interface to
                           extend an organization's brand.

                           o Multiple  language support for a multilingual  user
                           base.

                  o We also offer  Service  Providers  the option to license and
                  install  our  software  and  technology,  where  circumstances
                  allow.  In this  offering,  the customer  licenses the Service
                  Provider Solution,  installs it in-house, and offers messaging
                  and email from its own data center  facility.  Advantages  and
                  features include:


                                       2


                           o A complete software version of the Service Provider
                           Solution,  including all advanced features  mentioned
                           above.

                           o Complete  design of the required  architecture  for
                           running the Software.

                           o A dedicated installation team to install the system
                           and software in a timely and cost effective fashion.

                           o A pricing  model based on an upfront  license  fee,
                           and an annual 20% support contract.

                           o An  optional  24/7  remote  monitoring  and  system
                           administration  function for  customers  that require
                           on-going management.

                  o  Our  Service  Provider  Solution   provides   comprehensive
                  administrative capabilities

                           o   Our   well-documented   XML   APIs   (application
                           programming  interface)  allow a service  provider to
                           integrate   email   administrative   activities   and
                           customer  data  into  its  current  applications  and
                           systems.

                           o  Our  domain-level  management  gives  the  service
                           provider the option of delegating  administration  to
                           its customer to lower the service  provider's support
                           costs.

                           o Our detailed reports provide essential  information
                           for billing and usage statistics.

                           o  Our  ability  to  fully   secure  SSL   management
                           transactions  ensure that service  provider's data is
                           safe.

                           o Our Online  Management  Center  (OMC)  provides the
                           service provider with a user-friendly  administration
                           interface  equipped  with a  broad-range  of  account
                           provisioning  functionality,  as  an  alternative  to
                           using APIs.

         Internet-centric  organizations (web portals and web sites that provide
         free email and messaging to their customers and site visitors)

                  o Our  solution  is easy to use and  provides a broad range of
                  functionality.  This  includes  the  ability  for end users to
                  collect  email  from other  email  accounts,  create  folders,
                  attach  electronic  documents,  store  messages,   maintain  a
                  contact  center,  maintain  an  integrated  calendar,   create
                  distribution lists and establish user profiles and signatures.
                  Our service  uses IMAP4,  an advanced  email  protocol,  which
                  allows  email  folders  to be  accessed  from  multiple  email
                  environments.

                  o The value of our solution is  increased by our  provision of
                  additional  services,  such as those  which allow end users to
                  send and receive voicemail and pages from the emailbox; access
                  the  Web-based  emailbox  from an  off-line  client  (such  as
                  Microsoft   Outlook);   and  have  email  forwarded  to  other
                  addresses.

                  o Our solutions are aimed at increasing  the potential for our
                  customers to generate  revenue by increasing the  "stickiness"
                  of their  websites.  We believe that traffic to our customers'
                  websites  should  increase as end users  frequently  visit the
                  website  to check  their  email.  The  benefits  of  increased
                  website  stickiness  include more frequent  communication with
                  end  users,   enhanced  customer  loyalty  and  the  potential
                  opportunity  to generate  revenues  from  advertising,  direct
                  marketing and e-commerce transactions.

                                       3


Because we have a limited operating history providing  outsourced email services
to the  service  provider,  telecommunications  and  enterprise  markets,  it is
difficult to evaluate our business and  prospects.  We commenced  operations  in
1991, but we began  commercially  selling  Web-based email services only in 1998
after  changing our strategic  focus from the sale,  maintenance  and service of
stand-alone email client software products for mainframe and personal computers.
During the third  quarter of 2000,  we began the  process of  repositioning  the
company  to provide  outsourced  email and  messaging  services  to the  service
provider,  telecommunications  and enterprise  markets primarily through channel
partners.  This  change  required  us to adjust our  business  processes  and to
restructure Commtouch to become an outsourced email service provider. Therefore,
we have only a limited  operating  history as a provider of email  services upon
which you can evaluate our business and prospects.  It is too early to judge the
success of this service offering,  the enterprise focus and distribution through
channel partners.  We incurred net losses of approximately $4.4 million in 1998,
$19.9  million in 1999,  $54.2  million  in 2000 and $17.1  million in the first
quarter  of  2001.  As of March  31,  2001,  we had an  accumulated  deficit  of
approximately $102.9 million. We have not achieved  profitability in any period,
and we expect to continue to incur net losses for the foreseeable  future. If we
do achieve  profitability,  we may not sustain or increase  profitability in the
future. This may, in turn, cause our share price to decline.


Office Location

Our  principal  executive  offices  are  located  at  6  Hazoran  Street,  Poleg
Industrial  Park,  Netanya  42504,   Israel,   where  our  telephone  number  is
011-972-9-863-6888,   and  2029  Stierlin  Court,   Mountain  View,   California
94043-4655,  where our telephone number is (650) 864-2000. Our website addresses
are www.commtouch.com and www.zzn.com. The information contained on our websites
is not a part of this prospectus.


                                  RISK FACTORS


You should  carefully  consider the following  risk factors before you decide to
buy our ordinary shares.  You should also consider the other information in this
prospectus.  If  any  of the  following  risks  actually  occur,  our  business,
financial  condition,  operating  results  or cash  flows  could  be  materially
adversely affected. This could cause the trading price of our ordinary shares to
decline, and you could lose part or all of your investment.  The risks described
below are not the only ones facing us.  Additional  risks not presently known to
us,  or  that we  currently  deem  immaterial,  may  also  impair  our  business
operations.  This prospectus  contains  forward-looking  statements that involve
risks  and   uncertainties.   These  statements  relate  to  our  future  plans,
objectives,  beliefs,  expectations  and  intentions.  In  some  cases,  you can
identify  forward-looking  statements  by our use of  words  such as  "expects,"
"anticipates,"  "believes,"  "intends,"  "plans,"  "seeks" and  "estimates"  and
similar expressions. You will find forward-looking statements under the captions
"Summary,"  "Risk  Factors,"  "Reasons  for  Offer  and  Use of  Proceeds,"  and
elsewhere in this prospectus and the information  incorporated by reference into
this  prospectus.  Our  actual  results,  levels  of  activity,  performance  or
achievements  may differ  materially  from those  expressed  or implied by these
forward-looking  statements.  Factors  that could cause or  contribute  to these
differences  include those  discussed below and elsewhere in this prospectus and
the information incorporated by reference into this prospectus.


RECENT DEVELOPMENTS

On January 2, 2001, we announced that, in the wake of the economic  downturn and
changes in market demand,  we had initiated  several  internal changes to better
serve the enterprise  messaging market.  These internal changes include reducing
our operating  expenses  associated  with supporting the dot-com and destination
site  markets,  closing our  e-commerce  division  and email  services for small
community  sites,  and  promoting  greater  efficiencies  in  channel  sales and
marketing to the  enterprise  market.  Those changes were designed to reduce our

                                       4


worldwide  headcount by approximately 20% and, combined with other cost savings,
reduce  overall  operating  expenses by $16 million from the operating  plan for
2001.

On February 14, 2001,  we reported a net loss for the fourth  quarter of 2000 of
$24.1  million,  or a loss of  $1.51 a share,  compared  with a net loss of $7.4
million,  or a loss of $0.51 a share  for the  fourth  quarter  of  1999.  Total
revenues  rose to $5.3  million for the quarter  from $2.2 million in the fourth
quarter of 1999.  We also said we  expected  to restate our revenue and net loss
for the first three quarters of 2000. We stated that first-quarter revenue would
be restated downwards to $3.6 million from $4.3 million,  second-quarter revenue
would be restated  downwards to $5.0 million from $5.9 million and third-quarter
revenue would be restated  downwards to $5.2 million from $8.1 million.  We said
our net loss for the first  quarter would be restated to $9.1 million from a net
loss of $8.5  million,  our  second-quarter  net loss would be restated to $10.8
million  from $9.9 million and our  third-quarter  net loss would be restated to
$10.2 million from $7.6 million. On March 22, 2001, we filed amendments to Forms
6-K which included restated financial statements for the first, second and third
quarters of 2000.

On March 1, 2001, we announced that we are  reorganizing our business to enhance
our focus on enterprise messaging solutions. Accordingly, we expect to focus our
operations on three enterprise  messaging  businesses:  Commtouch core email and
messaging  service for the enterprise market which include the recently launched
Microsoft Hosted Exchange service offering;  the enterprise  messaging migration
and integration technologies business through our wholly-owned subsidiary Wingra
Technologies;  and  our  technology  development  of  next-generation  messaging
applications for marketing to worldwide  telecommunication  companies,  Internet
Data Centers and service providers. We said that as part of this reorganization,
we would be  streamlining  our global  operations  and reducing our workforce by
approximately  50%,  to about  210  people.  We noted  that the  current  global
economic environment required that we incur a significant  reduction in expenses
in order to enhance our  financial  strength  and  maintain a sharp focus on the
most promising market  opportunities.  While this  reorganization is expected to
increase  service  and  licensing  revenues,  we are  unable to  predict if this
strategy will be successful in enhancing returns to shareholders.

Following  our  restatement  of revenues  for the first three  quarters of 2000,
several class action lawsuits were filed in the United States District Court for
the  Northern  District  of  California,  against the Company and certain of our
officers and directors,  alleging violations of the antifraud  provisions of the
Securities Exchange Act of 1934 arising from the Company's financial statements.
While we are unable to predict the ultimate outcome of these claims,  we believe
they are without merit and intend to vigorously defend ourselves.

As of December  31, 2000,  we had  approximately  $29.4  million of cash to fund
operations in 2001. In 2000 we utilized  $31.2 million of cash to fund operating
losses,  $19.1  million for  purchasing  property,  plant and equipment and $7.0
million in strategic long term investments.  To limit our cash expenses in 2001,
we have significantly  reduced staff,  curtailed  discretionary  expenses,  made
available for sublease excess facilities and limited capital expenditures. These
actions  were  made  due to a  decline  in our  revenue  growth  resulting  from
competitive factors and a slowing economic  environment.  To enhance our overall
financial position, we have entered into an equity line purchase agreement under
which Torneaux Fund,  Ltd., an institutional  investor,  has agreed to invest in
the Company's  ordinary  shares  provided the share price is above $2 or a lower
amount if mutually  agreed.  Recently,  our ordinary shares have been trading at
below that price. The cash realized for the shares sold will be determined based
on the weighted average price of the shares in the month of placement.

Based  on the  cash  balance  at  March  31,  2001  of  $13.3  million,  current
projections  of  revenues,  related  expenses,  the  ability to further  curtail
certain discretionary  expenses, in accordance with a board approved contingency
plan,  and  a  potential  funding  capability  under  the  current  equity  line
arrangement or other equity arrangement,  the Company believes it has sufficient
cash to continue  operations  for at least the next twelve months.  However,  to
continue  funding  developments of its software  products,  the company needs to

                                       5


raise at least $5  million  of  additional  cash by  issuing  equity  under  its
existing equity line  arrangement,  and/or the Company needs to seek alternative
sources of capital.  Accordingly,  the Board of Directors  has retained  William
Blair & Company to render  investment  banking  services  in  connection  with a
possible private placement of the Company's equity securities.

Business Risks

If the market for our outsourced email services does not grow significantly,  we
would fail to generate revenues.

Our success will depend on the acceptance and use of email that is outsourced by
enterprises as a means of communication (as opposed to in-house deployment). The
market for  outsourced  email  services is new and rapidly  evolving.  We cannot
estimate  the  size or  growth  rate of the  potential  market  for our  service
offerings. If the market for outsourced email fails to grow or grows more slowly
than we currently  anticipate,  our business will suffer  dramatically.  Even if
that market grows, our service may not achieve broad market acceptance. Since we
have only recently introduced our services, we do not have sufficient experience
to evaluate whether they will achieve broad market  acceptance.  Also, because a
preponderance  of our  revenue  is  derived  directly  or  indirectly  from  our
outsourced  email  solutions,  if that market does not grow,  our business  will
likely fail.


Our future email services revenues are unpredictable and our quarterly operating
results may fluctuate which could adversely affect the value of your investment.

Because we have a limited operating history in the provision of outsourced email
services and because of the emerging  nature of the markets in which we compete,
our revenue is  unpredictable.  Our current and future  expense  levels are to a
large extent fixed.  We may be unable to adjust  spending  quickly to compensate
for any revenue shortfall,  and any significant  revenue shortfall would have an
immediate negative effect on our results of operations and share price.


A number  of  factors,  many of which  are  enumerated  in this  "Risk  Factors"
section,  are likely to cause fluctuations in our operating results and/or cause
our share  price to decline.  Other  factors  which may cause such  fluctuations
include:

         o  The size, timing and fulfillment of orders for our email services;

         o  The success of our channel and direct selling  efforts to enterprise
            customers;

         o  The rate of adoption of out-sourced  e-mail  solutions by enterprise
            customers in the current economic environment;

         o  The threat of  de-listing  by the NASDAQ if our shares fall below $1
            for an extended period of time;

         o  The  receipt or payment of  irregular  or  nonrecurring  revenues or
            expenses;

         o  Our mix of service offerings,  including our ability to successfully
            implement new services;

         o  Pricing of our services; and

         o  Effectiveness of our customer support.


Because of differing  operating  factors,  period-to-period  comparisons  of our
operating  results are not a good  indication of our future  performance.  It is
likely  that  our  operating  results  in some  quarters  will be  below  market
expectations.  Because we have a limited operating history providing  outsourced

                                       6


email  services  to the  service  provider,  telecommunications  and  enterprise
markets, it is difficult to evaluate our business and prospects.

We commenced  operations in 1991, but we began  commercially  selling  Web-based
email  services only in 1998 after  changing our strategic  focus from the sale,
maintenance  and service of  stand-alone  email  client  software  products  for
mainframe and personal computers. During the third quarter of 2000, we began the
process of repositioning  the company to provide  outsourced email and messaging
services to the service  provider,  telecommunications  and  enterprise  markets
primarily  through  channel  partners.  This  change  required  us to adjust our
business  processes and to restructure  Commtouch to become an outsourced  email
service  provider.  Therefore,  we have only a limited  operating  history  as a
provider  of email  services  upon  which  you can  evaluate  our  business  and
prospects.  It is too early to judge the success of this service  offering,  the
enterprise focus and distribution through channel partners.


We have  many  established  competitors  who are  offering  the same or  similar
services

The market for outsourced email services is intensely  competitive and we expect
it to be increasingly competitive. Increased competition could result in pricing
pressures,  reduced  operating  margins and loss of market  share,  any of which
could cause our business to suffer.

In the  market  for email and  messaging  services,  we  compete  directly  with
outsourced  email  service   providers,   including   Critical  Path,   Easylink
Corporation (formerly Mail.com),  USA.NET, United Messaging and USinteractive as
well as with companies that develop and maintain  in-house email  solutions such
as  Microsoft  and IBM.  In  addition,  companies  such as  Openwave,  (formerly
Software.com)  and iPlanet  currently offer email software products to ISPs, web
hosting  companies,   web  portals  and  corporations.   Furthermore,   numerous
small-scale email providers offer low-cost basic services,  but without scalable
systems  or  value-added   functionality.   These  and  other   companies  could
potentially leverage their existing  capabilities and relationships to enter the
email service  industry by redesigning  their system  architecture,  pricing and
marketing  strategies to sell through to the entire market. The ability of these
competitors to offer a broader suite of  complementary  services may give them a
considerable  advantage over us. In the future,  ISPs, web hosting companies and
outsourced  application companies may broaden their service offerings to include
outsourced email.

Our market's level of  competition is likely to increase as current  competitors
increase the sophistication of their offerings and as new participants enter the
market.  In the future,  as we expand our service  offerings,  we may  encounter
increased competition in the development and delivery of these services. Many of
our current and potential  competitors have longer operating  histories,  larger
customer bases,  greater brand recognition and greater financial,  marketing and
other  resources  than  we  do  and  may  enter  into  strategic  or  commercial
relationships on more favorable terms.  Further,  certain of our competitors may
offer services at or below cost. In addition, new technologies and the expansion
of existing technologies may increase competitive pressures on us. We may not be
able  to  compete  successfully  against  current  and  future  competitors  and
increased competition may result in reduced operating margins and loss of market
share.


Our ability to increase our revenues will depend on our ability to  successfully
execute our sales and marketing plan.

The complexity of our Internet messaging services and the emerging nature of the
outsourced email market require highly trained sales and marketing  personnel to
educate  prospective  customers  regarding the use and benefits of our services.
The majority of our sales and  marketing  personnel  have only  recently  joined
Commtouch  and have limited  experience  working  together.  In addition we have
limited experience in selling to enterprise  customers and in successful channel
selling.  It will  take  time for these  employees  to learn  how to market  our

                                       7


enterprise  solutions  and  to  be  integrated  into  our  sales  and  marketing
organization.   Some  of  them  may  not  succeed  in  making  this  transition.
Additionally,  we are unable to predict the success in selling newly  introduced
additional  services  that we have no  experience  marketing  and are relying on
these  services to produce a substantial  portion of our revenues in the future.
As a result of these factors,  our sales and marketing  organization  may not be
able to compete  successfully  against the bigger and more experienced sales and
marketing organizations of our competitors.


We have a history of losses and may never achieve profitability.

We incurred net losses of  approximately  $4.4 million in 1998, $19.9 million in
1999,  $54.2 million in 2000 and $17.1 million for the first quarter of 2001. As
of March  31,  2001,  we had an  accumulated  deficit  of  approximately  $102.9
million.  We have not  achieved  profitability  in any period,  and we expect to
continue  to incur net  losses  for the  foreseeable  future.  If we do  achieve
profitability,  we may not sustain or increase profitability in the future. This
may, in turn, cause our share price to decline.

Need For Additional Funds

We are dependent upon raising additional funds to finance our business. Our cash
balance at March 31, 2001 was $13.3 million. We will need at least $5 million in
additional  funding in the near term in order to  continue  our  business at the
current  level of  operations  for the next twelve  months.  If we fail to raise
sufficient near term funding, we have developed a contingency plan which will be
put into  effect.  The  plan  will  require  us to  effect  cost  reductions  by
curtailing  research and development  operations,  human resources  expenses and
other costs so as to allow us to continue a reduced level of operations  for the
next twelve months.

Assuming we either raise at least $5 million in  additional  funding in the near
term or implement the contingency plan, we may nonetheless continue to be thinly
capitalized, which may adversely affect our ability to expand our operations, to
recruit  and  retain  employees,  to enter  into  agreements  with  vendors  and
customers,  and to withstand changes in business conditions.  We may, therefore,
need to raise additional  funds,  through  additional  equity or debt financing,
collaborative  relationships,  strategic alliances with commercial partners,  or
otherwise. There can be no assurance that we will be able to raise the necessary
funds or that we will be able to do so on terms  acceptable to us. Our inability
to obtain  adequate  capital would limit our ability to continue our operations.
Any such  additional  funding  may result in  significant  dilution  to existing
stockholders.

Risk of Recession


Some of our  customers  continue  to  operate  in the  dot-com  market  based on
internet-centric  business  models and are  experiencing a significant  economic
slowdown and an inability to raise additional capital.

Our ability to collect outstanding  receivables is significantly impacted by the
liquidity issues of these customers and this may also impact our ability to sell
future services and recognize  future revenue despite  committed  contracts from
them.  This has had, and may continue to have, a negative  impact on our ability
to recognize  future  revenues  and as a result,  we may  experience  unexpected
shortfalls in our future revenues.


The loss of our key employees would  adversely  affect our ability to manage our
business,  therefore  causing our  operating  results to suffer and the value of
your investment to decline.

Our success  depends on the skills,  experience  and  performance  of our senior
management and other key personnel, many of whom have worked together for only a
short period of time.  The loss of the services of any of our senior  management

                                       8


or other key personnel,  including Gideon Mantel,  our Chief Executive  Officer,
Amir Lev, our President and Chief Technical  Officer,  and Sunil  Bhardwaj,  our
Chief Financial  Officer who recently joined us, could  materially and adversely
affect our business. We do not have employment agreements with any of our senior
management or other key  personnel.  We cannot  prevent them from leaving at any
time.  We do not  maintain  key-person  life  insurance  policies  on any of our
employees.

Our recent  head-count  reduction  from 486  employees to  approximately  210 is
significantly straining our managerial,  operational and financial resources. We
have  significantly  curtailed  sales  and  marketing  resources  and  this  may
compromise  our  ability to  enhance  revenues.  We also will incur  significant
expenditures  for wage  continuance  payments in connection  with this personnel
restructuring in order to comply with the WARN ACT 60 day notice requirements.


Our  business  and  operating  results  could  suffer if we do not  successfully
address the risks inherent in the expansion of our international operations.

At December 31, 2000 we had sales offices in the Israel, United States, England,
Latin  America  and Japan.  During the first  quarter of 2001,  we closed  sales
offices in New York,  Miami and  England.  We intend to continue to seek ways to
market our services in international  markets by utilizing significant financial
and managerial resources. We have limited experience in international operations
and may not be able to compete effectively in international markets. The Company
will face risks inherent in conducting business internationally, such as:

         o  difficulties  and  costs  of  staffing  and  managing  international
            operations;

         o  fluctuations in currency exchange rates;

         o  imposition of currency exchange controls;

         o  differing technology standards;

         o  export   restrictions,   including   export  controls   relating  to
            encryption technologies;

         o  difficulties in collecting accounts receivable and longer collection
            periods;

         o  unexpected changes in regulatory requirements;

         o  political and economic instability;

         o  potentially adverse tax consequences; and

         o  potentially reduced protection for intellectual property rights.

Any  of  these  factors  could  adversely  affect  the  Company's  international
operations  and,  consequently,  business and operating  results.  Specifically,
failure to  successfully  manage  international  growth  could  result in higher
operating  costs than  anticipated  or could  delay or preclude  altogether  the
Company's ability to generate revenues in key international markets.


Technology Risks


Because our business is based on communications and messaging  services,  we are
susceptible to system interruptions and capacity  constraints,  which could harm
our business and reputation.

Our ability to  successfully  receive and send our end users' email messages and
provide  acceptable  levels of  service  largely  depends on the  efficient  and
uninterrupted  operation of our computer and communications hardware and network

                                       9


systems and those of our outsourced hosting service. In addition,  the growth in
the  use of the  Internet  has  caused  frequent  interruptions  and  delays  in
accessing  the  Internet  and  transmitting  data over the  Internet.  We do not
possess  insurance to cover losses caused by unplanned system  interruptions and
software  defects.  In the past, we have experienced  some  interruptions in our
email service.  We believe that these  interruptions will continue to occur from
time to time. These  interruptions may be due to hardware failures,  unsolicited
bulk  email  (also  known as  "spam"),  operating  system  failures,  inadequate
Internet  infrastructure  capacity,  and other  mechanical and human causes.  We
expect to experience  occasional,  temporary capacity constraints due to sharply
increased traffic,  which may cause  unanticipated  system  disruptions,  slower
response times,  impaired quality and degradation in levels of customer service.
If we experience  frequent or long system  interruptions that reduce our ability
to provide email  services,  we may have fewer users of our email  services.  In
addition,  we have entered into service  agreements  with some of our  customers
that require minimum performance standards.  If we fail to meet these standards,
our customers could terminate their relationships with us.

We must  continue  to expand and adapt our  network  infrastructure  to changing
requirements  and increasing  numbers of end users. The expansion and adaptation
of our network  infrastructure will require substantial  financial,  operational
and managerial  resources.  In addition, we depend on improvements being made to
the entire Internet  infrastructure  to alleviate  overloading and congestion of
the  Internet.  The  ability of our network to continue to connect and manage an
expanding  number of  customers,  end users and  messages  at high  transmission
speeds is unproven and uncertain. We face risks related to our network's and the
Internet's ability to operate with higher use levels while maintaining  expected
performance  levels.  To manage any further  growth,  we will need to improve or
replace our existing operational, customer service and financial systems as well
as our procedures and controls.


Although we are a leading global provider in our particular field of outsourced,
email, we are a relatively small competitor in the electronic messaging industry
as a whole. As a result,  we may not have the resources to adapt to the changing
technological   requirements  and  the  shifting  consumer  preferences  of  our
industry.

The Internet messaging industry is characterized by rapid technological  change,
changes in end user  requirements  and  preferences,  and the  emergence  of new
industry  standards  and practices  that could render our existing  services and
proprietary technology obsolete. Our success depends, in part, on our ability to
continually enhance our existing email and messaging services and to develop new
services,  functions and technology that address the increasingly  sophisticated
and varied needs of our  prospective  customers.  The development of proprietary
technology and necessary service enhancements entails significant  technical and
business risks and requires substantial  expenditures and lead-time.  We may not
be able to keep pace with the latest technological  developments.  We may not be
able to use new  technologies  effectively  or adapt our services to customer or
end user requirements or emerging industry  standards.  Also, we must be able to
act more quickly than our competition.


Our services may be adversely  affected by software  defects,  which could cause
our customers or end users to stop using our services.

Our  service  offerings  depend on  complex  software.  Complex  software  often
contains  defects,  particularly  when first introduced or when new versions are
released.  Although we conduct extensive  testing,  we may not discover software
defects that affect our new or current services or enhancements until after they
are deployed.  Although we have not experienced any material software defects to
date,  it is  possible  that,  despite  testing by us,  defects may exist in the
software we use.  These  defects could cause  service  interruptions  that could
damage our reputation or increase our service  costs,  cause us to lose revenue,
delay market acceptance or divert our development resources,  any of which could
cause our  business  to  suffer.  Some of our  services  are  based on  software
provided by third parties. We have no control over the quality of such software.

                                       10


We rely on the integrity of our network  security,  which may be  susceptible to
breaches that could harm our reputation and business.

A fundamental  requirement for online  communications is the secure transmission
of confidential  information over public networks.  Third parties may attempt to
breach our  security or that of our  customers.  Despite our  implementation  of
third party encryption technology and network security measures, our servers are
vulnerable to computer  viruses,  physical or  electronic  break-ins and similar
disruptions,  which could lead to interruptions,  delays or loss of data. We may
be liable to our  customers  and their end users for any breach in our security,
including  claims for  impersonation  or other similar fraud claims,  as well as
claims for other misuses of personal  information,  for example for unauthorized
marketing  purposes.   Also,  such  a  breach  could  harm  our  reputation  and
consequently our business. We may also be required to expend significant capital
and other resources to license encryption technology and additional technologies
to protect  against  security  breaches or to alleviate  problems  caused by any
breach.  Our failure to prevent security  breaches could have a material adverse
effect on our business and operating results.

In  addition,  the  Federal  Trade  Commission  and  several  states  have  been
investigating   some  Internet   companies   regarding  their  use  of  personal
information. We could incur additional expenses if new regulations regarding the
use of  personal  information  are  introduced,  if our  privacy  practices  are
investigated  or if our  privacy  policies  are viewed  unfavorably  by users or
potential users.


Investment Risks


We may need additional capital.

We have invested heavily in technology and infrastructure development. We expect
to continue to spend substantial financial and other resources on developing and
introducing  new service  offerings and  maintaining our sales and marketing and
corporate  management  organizations,   strategic  relationships  and  operating
infrastructure.  We also expect to invest substantial  resources in research and
development projects to develop enhanced service provider messaging solutions.

Based  on the  cash  balance  at  March  31,  2001  of  $13.3  million,  current
projections  of  revenues,  related  expenses,  the  ability to further  curtail
certain discretionary  expenses, in accordance with a board approved contingency
plan,  and  a  potential  funding  capability  under  the  current  equity  line
arrangement or other equity arrangement,  the Company believes it has sufficient
cash to continue  operations  for at least the next twelve months.  However,  to
continue  funding  developments of its software  products,  the company needs to
raise at least $5  million  of  additional  cash by  issuing  equity  under  its
existing equity line  arrangement,  and/or the Company needs to seek alternative
sources of capital.  Accordingly,  the Board of Directors  has retained  William
Blair & Company to render  investment  banking  services  in  connection  with a
possible private placement of the Company's equity securities.


We are  subject  to several  pending  lawsuits  the  outcome of which may have a
material adverse effect on us.

Following  our  restatement  of revenues  for the first three  quarters of 2000,
several class action lawsuits were filed in the United States District Court for
the  Northern  District  of  California,  against the Company and certain of our
officers and directors,  alleging violations of the antifraud  provisions of the
Securities Exchange Act of 1934 arising from the Company's financial statements.
While we are unable to predict the  ultimate  outcome of these claims we believe
they are without merit and intend to vigorously defend ourselves.


If we cannot  satisfy  Nasdaq's  maintenance  requirements,  it may  delist  our

                                       11


ordinary  shares and we may not have an active  public  market for our  ordinary
shares, which would likely make our shares an illiquid investment.

Our ordinary shares are quoted on the Nasdaq National Market Market. To continue
to be listed, our shares must have a minimum bid price of $1.00 per share, among
other requirements.  Recently,  from time to time, our shares have had a minimum
bid price of less  than  $1.00 per  share.  Consequently,  we may not be able to
satisfy the Nasdaq listing requirement in the future. If this occurs, trading in
the shares may be  conducted  in the  over-the-counter  market in the  so-called
"pink sheets" or, if available,  the "OTC Bulletin Board  Service." As a result,
an investor would likely find it significantly  more difficult to dispose of, or
to obtain accurate quotations as to the value of, our shares.

Nasdaq also may delist our shares if it deems it necessary to protect  investors
and the public interest.


If our shares are delisted,  they may become  subject to the SEC's "penny stock"
rules and more difficult to sell.

SEC rules  require  brokers to provide  information  to purchasers of securities
traded at less than $5.00 and not traded on a national  securities  exchange  or
quoted on the Nasdaq Stock  Market.  If our shares  become "penny stock" that is
not exempt  from these SEC rules,  these  disclosure  requirements  may have the
effect of reducing  trading  activity in our shares and making it more difficult
for  investors  to  sell.  The  rules  require  a  broker-dealer  to  deliver  a
standardized  risk  disclosure  document  prepared  by  the  SEC  that  provides
information  about  penny  stocks and the nature and level of risks in the penny
market.  The  broker  must also give bid and offer  quotations  and  broker  and
salesperson compensation information to the customer orally or in writing before
or with the confirmation.  The SEC rules also require a broker to make a special
written  determination  that the penny  stock is a suitable  investment  for the
purchaser  and receive the  purchaser's  written  agreement  to the  transaction
before a transaction in a penny stock.


Our directors,  executive  officers and principal  shareholders  will be able to
exert  significant  influence over matters  requiring  shareholder  approval and
could delay or prevent a change of control.

Our directors and  affiliates of our directors,  our executive  officers and our
shareholders  who currently  individually  own over five percent of our ordinary
shares, beneficially own, in the aggregate, approximately 25% of our outstanding
ordinary  shares.  If they vote  together,  these  shareholders  will be able to
exercise significant  influence over all matters requiring shareholder approval,
including  the  election of  directors  and  approval of  significant  corporate
transactions.  This  concentration  of  ownership  could also delay or prevent a
change in control of Commtouch.

Jan Eddy,  the President  and Chief  Executive  Officer of Wingra  Technologies,
beneficially owns approximately 5% of our outstanding  ordinary shares issued to
her in connection  with our  acquisition of Wingra  Technologies on November 24,
2000.

InfoSpace beneficially owns approximately 5% of our outstanding ordinary shares.
InfoSpace  merged with Go2Net in October 2000.  In  connection  with this merger
InfoSpace  assumed  Go2Net shares,  warrants and rights.  In 1999, in connection
with entering into an email services agreement, we issued to InfoSpace a warrant
to purchase  1,136,000 ordinary shares at an exercise price of $12.80 per share.
The warrant is non-forfeitable,  fully vested and immediately  exercisable,  and
will expire in July 2004.  Assuming  exercise of the InfoSpace  warrant on a net
issuance basis, the warrant currently has no impact on beneficial ownership,  as
the warrant is currently underwater.

These  significant  shareholders  will be able to  significantly  influence  and
possibly  exercise  control  over  most  matters   requiring   approval  by  our
shareholders,  including the election of directors  and approval of  significant

                                       12


corporate transactions. This concentration of ownership may also have the effect
of delaying or  preventing  a change in  control.  InfoSpace  will also have the
right to name one director to our Board as long as it continues to hold at least
620,022  shares,  including  the shares  issuable upon exercise of the InfoSpace
warrant.  They have named  Thomas  Camp to the Board  under this  provision.  In
addition,  conflicts of interest may arise as a consequence of these significant
shareholders control relationship with us, including:


         o  conflicts   between   significant   shareholders,   and  our   other
            shareholders whose interests may differ with respect to, among other
            things   our   strategic   direction   or   significant    corporate
            transactions;

         o  conflicts related to corporate  opportunities  that could be pursued
            by us, on the one hand, or by these shareholders, on the other hand;
            or

         o  conflicts  related  to  existing  or new  contractual  relationships
            between us, on the one hand,  and these  shareholders,  on the other
            hand.


Substantial sales of our ordinary shares could adversely affect our share price.

The sale, or  availability  for sale, of substantial  quantities of our ordinary
shares may have the effect of depressing its market price. A large number of our
ordinary  shares  which  were  previously  subject to resale  restrictions,  are
currently  eligible for resale. In addition a significant  number of shares will
be eligible for resale at various dates in the future.

As  previously  mentioned,  we have an agreement to issue equity under an equity
line agreement with Torneaux,  an  institutional  investor.  The shares we issue
under this agreement will dilute existing shareholders.

On  November  24,  2000  the  company   announced  its   acquisition  of  Wingra
Technologies for a purchase price of 1.29 million Commtouch  ordinary shares and
0.3 million fully vested Commtouch options and warrants. The Company is required
to register these shares and intends to file a registration  statement  shortly.
Upon  effectiveness of the  registration,  the shares can be freely traded which
could adversely impact our share price.


Governmental Risks

If we fail to  adequately  protect our  intellectual  property  rights or face a
claim of intellectual  property infringement by a third party, we could lose our
intellectual property rights or be liable for significant damages.

We regard our copyrights,  service marks, trademarks,  trade secrets and similar
intellectual  property as critical to our  success,  and rely on  trademark  and
copyright law, trade secret protection and confidentiality or license agreements
with our  employees  and  customers  to protect our  proprietary  rights.  Third
parties may infringe or  misappropriate  our copyrights,  trademarks and similar
proprietary rights.  Although we have not filed any patent applications,  we may
seek to patent  certain  software or other  technology  in the future.  Any such
future patent  applications  may not be issued within the scope of the claims we
seek, or at all. We cannot be certain that our software does not infringe issued
patents that may relate to our software  products.  In addition,  because patent
applications in the United States are not publicly disclosed until the patent is
issued, applications may have been filed which relate to our software products.

Despite our precautions, unauthorized third parties may copy certain portions of
our technology or reverse  engineer or obtain and use information that we regard
as proprietary. End user license provisions protecting against unauthorized use,
copying,  transfer and disclosure of the licensed  program may be  unenforceable
under the laws of some  jurisdictions and foreign  countries.  In addition,  the
laws of some  foreign  countries do not protect  proprietary  rights to the same
extent  as do the  laws of the  United  States.  Our  means  of  protecting  our
proprietary  rights  in the  United  States or abroad  may not be  adequate  and

                                       13


competitors may independently develop similar technology.


We may have liability for email content.

As a provider of email  services,  we face potential  liability for  defamation,
negligence,  copyright,  patent or trademark infringement and other claims based
on the nature and content of the materials  transmitted via email. We do not and
cannot  screen  all  of  the  content  generated  by  end  users.  Some  foreign
governments,  such  as  the  government  of  Germany,  have  enforced  laws  and
regulations  related  to content  distributed  over the  Internet  that are more
strict than those  currently in place in the United  States.  Any  imposition of
liability  could  damage our  reputation  and hurt our  business  and  operating
results, or could result in criminal penalties.


Governmental  regulation and legal  uncertainties could impair the growth of the
Internet  and  decrease  demand for our  services or increase  our cost of doing
business.

There are currently few laws and regulations directly applicable to the Internet
and  commercial  email  services.  However,  a number of laws have been proposed
involving  the  Internet,  including  laws  addressing  user  privacy,  pricing,
content, copyright,  antitrust,  distribution and characteristics and quality of
products and services.  Further,  the growth and  development  of the market for
email may prompt  calls for more  stringent  consumer  protection  laws that may
impose additional burdens on companies conducting business online. Moreover, the
applicability  to  the  Internet  of  existing  laws  in  various  jurisdictions
governing issues such as property  ownership,  sales and other taxes,  libel and
personal  privacy is  uncertain  and may take years to resolve.  The adoption of
additional  laws  or  regulations,  or  the  application  of  existing  laws  or
regulations to the Internet, may impair the growth of the Internet or commercial
online  services.  This could  decrease the demand for our services and increase
our  cost of doing  business,  or  otherwise  harm our  business  and  operating
results.

Due to  the  global  nature  of the  Web,  it is  possible  that,  although  our
transmissions currently originate in California, the governments of other states
or foreign  countries might attempt to regulate our  transmissions or levy sales
or other taxes relating to our activities. The European Union previously adopted
a directive  addressing data privacy that may result in limits on the collection
and use of user information.

On October 20,  1999,  The  Federal  Trade  Commission  issued the final rule to
implement the Children's  Online Privacy  Protection Act of 1998 ("COPPA").  The
main goal of the COPPA and the rule is to protect the privacy of children  using
the  Internet.  As of May 21,  2000,  certain  commercial  websites  and  online
services directed to, or that knowingly collect  information from, children must
obtain  parental  consent  before  collecting,  using,  or  disclosing  personal
information  from  children  under 13. The COPPA  regulations  could  reduce our
ability to engage in direct marketing. The cost to the Company of complying with
the new  requirements is not known and such cost may have a material effect upon
operating results or financial condition.


Risks Relating to Operations in Israel

We have  important  facilities  and  resources  located  in  Israel,  which  has
historically  experienced severe economic instability and military and political
unrest.

We are  incorporated  under  the laws of the  State  of  Israel.  Our  principal
research   and   development   facilities   are  located  in  Israel.   Although
substantially  all of our sales  currently  are being made to customers  outside
Israel, we are nonetheless  directly  influenced by the political,  economic and
military conditions affecting Israel. Any major hostilities involving Israel, or
the  interruption or curtailment of trade between Israel and its present trading

                                       14


partners, could significantly harm our business, operating results and financial
condition.

Israel's economy has been subject to numerous destabilizing factors, including a
period of rampant  inflation in the early to  mid-1980's,  low foreign  exchange
reserves,  fluctuations in world commodity prices,  military conflicts and civil
unrest.  In addition,  Israel and companies doing business with Israel have been
the  subject  of an  economic  boycott  by the  Arab  countries  since  Israel's
establishment. These restrictive laws and policies may have an adverse impact on
our operating results, financial condition or expansion of our business.

Since the establishment of the State of Israel in 1948, a state of hostility has
existed, varying in degree and intensity, between Israel and the Arab countries.
Although Israel has entered into various  agreements with certain Arab countries
and the  Palestinian  Authority,  and various  declarations  have been signed in
connection  with efforts to resolve some of the economic and political  problems
in the Middle East, we cannot  predict  whether or in what manner these problems
will be resolved.


Our results of operations  may be negatively  affected by the  obligation of key
personnel to perform military service.

In addition,  certain of our officers and employees  are currently  obligated to
perform  annual  reserve  duty in the Israel  Defense  Forces and are subject to
being  called for  active  military  duty at any time.  Although  Commtouch  has
operated  effectively under these  requirements  since its inception,  we cannot
predict  the  effect  of these  obligations  on  Commtouch  in the  future.  Our
operations could be disrupted by the absence,  for a significant  period, of one
or more of our officers or key employees due to military service.


Because a  substantial  portion of our revenues are  generated in U.S.  dollars,
while a significant portion of our expenses are incurred in New Israeli Shekels,
our results of  operations  may be adversely  affected by inflation and currency
fluctuations.

We generate a  substantial  portion of our revenues in U.S.  dollars but incur a
significant portion of our expenses,  principally salaries and related personnel
expenses,  in New Israeli Shekels,  commonly referred to as NIS. As a result, we
are  exposed to the risk that the rate of  inflation  in Israel  will exceed the
rate of  devaluation  of the NIS in relation to the dollar or that the timing of
any  devaluation may lag behind  inflation in Israel.  While in recent years the
rate of  devaluation  of the NIS against the dollar has  generally  exceeded the
rate of inflation,  which is a reversal from prior years, we cannot be sure that
this  reversal  will  continue.  If the dollar cost of our  operations in Israel
increases, our dollar-measured results of operations will be adversely affected.
Our  operations  also  could be  adversely  affected  if we are  unable to guard
against  currency  fluctuations  in the future.  Accordingly,  we may enter into
currency  hedging  transactions to decrease the risk of financial  exposure from
fluctuations in the exchange rate of the dollar against the NIS. These measures,
however,  may not adequately protect us from material adverse effects due to the
impact of inflation in Israel.


The government  programs and benefits which we currently  receive  require us to
meet several conditions and may be terminated or reduced in the future.

Prior to 1998, we received  grants from the  Government  of Israel,  through the
OCS, for the financing of a significant  portion of our research and development
expenditures  in Israel.  In 2000 we applied  for  additional  grants and we may
apply for  additional  grants in the future.  In 1998,  1999 and 2000 we did not
receive any grants from the OCS and we expect the percentage of our research and
development  expenditures financed from OCS grants will continue to remain quite
low.  The OCS  budget  has been  subject  to  reductions  which may  affect  the
availability  of funds for these grants in the future.  Therefore,  we cannot be
certain that we will continue to receive  grants at the same rate, or at all. In

                                       15


addition, the terms of any future OCS grants may be less favorable than our past
grants.  In connection  with research and  development  grants received from the
OCS, we must make  royalty  payments to the OCS on the revenue  derived from the
sale of products,  technologies and services  developed with grants from the OCS
unless such research and development projects are unsuccessful.

The terms of the OCS  grants and the law  pursuant  to which the grants are made
restrict our ability to manufacture products or transfer technologies  developed
using OCS grants outside of Israel.  This  restriction  may limit our ability to
enter  into   agreements  or  similar   arrangements   for  those   products  or
technologies,  without OCS approval.  We cannot be certain that the approvals of
the OCS will be obtained on terms that are acceptable to us. In connection  with
our grant applications, we have made representations and covenants with the OCS.
The funding from the OCS is subject to the accuracy of these representations and
covenants and to our compliance with the conditions and restrictions  imposed by
the OCS. If we fail to comply with any of these conditions or  restrictions,  we
could be  required  to repay  any  grants  previously  received,  together  with
interest and  penalties,  and would likely be  ineligible  to receive OCS grants
thereafter.


The tax benefits we are currently  entitled to from the Government of Israel may
be reduced or terminated in the future.

Pursuant to the Law for the Encouragement of Capital Investments, the Government
of Israel through the Investment Center has granted "approved enterprise" status
to a significant portion of our research and development efforts. The portion of
our income derived from our approved  enterprise program will be exempt from tax
for a limited period  commencing in the first year in which have taxable income,
and will be subject to a reduced  tax for an  additional  period.  The  benefits
available to an approved  enterprise  are  conditioned  upon the  fulfillment of
conditions  regarding a required  amount of  investments  in fixed  assets and a
portion of these  investments  being made with net  proceeds  of equity  capital
raised by us as stipulated in applicable law and in the specific certificates of
approval.  If we fail to comply with these  conditions,  in whole or in part, we
may be required  to pay  additional  taxes for the period in which we  benefited
from the tax  exemption  or reduced tax rates and would  likely be denied  these
benefits  in the  future.  From  time to time,  the  Government  of  Israel  has
discussed  reducing or  eliminating  the benefits  available  under the approved
enterprise  program. It is possible that these tax benefits may not be continued
in the future at their current levels or at all.


Israeli  courts might not enforce  judgments  rendered  outside of Israel and it
might therefore be difficult for an investor to recover any judgment against any
of our officers or directors resident in Israel.

We  are  organized  under  the  laws  of  Israel,  and we  maintain  significant
operations in Israel.  Certain of our officers and directors  reside  outside of
the United  States.  Therefore,  you might not be able to enforce  any  judgment
obtained in the U.S. against us or any of such persons. You might not be able to
bring civil actions under U.S.  securities laws if you file a lawsuit in Israel.
However,  we have been advised by our Israeli  counsel that,  subject to certain
limitations,  Israeli  courts may enforce a final  judgment of a U.S.  court for
liquidated amounts in civil matters after a hearing in Israel. We have appointed
Commtouch Software Inc., our U.S. subsidiary, as our agent to receive service of
process in any action against us arising from this report. We have not given our
consent for our agent to accept service of process in connection  with any other
claim and it may  therefore  be difficult  for an investor to effect  service of
process  against  us or any of our  non-U.S.  officers,  directors  and  experts
relating to any other  claims.  If a foreign  judgment is enforced by an Israeli
court, it may be payable in Israeli currency.


Provisions of Israeli law may delay, prevent or make difficult an acquisition of
Commtouch,  which could  prevent a change of control and  therefore  depress the
price of our shares.

                                       16


Israeli corporate law regulates  mergers,  votes required to approve mergers and
acquisitions  of shares through tender offers,  requires  special  approvals for
transactions involving significant shareholders and regulates other matters that
may be  relevant  to  these  types  of  transactions.  Furthermore,  Israel  tax
considerations may make potential  transactions  unappealing to us or to some of
our shareholders.

Proposed tax reform in Israel may reduce our tax benefits, which might adversely
affect our profitability.

On May 4, 2000 a  committee  chaired  by the  Director  General  of the  Israeli
Ministry of Finance,  Avi  Ben-Bassat,  issued a report  recommending a sweeping
reform  in  the  Israeli   system  of  taxation.   The  proposed   reform  would
significantly alter the taxation of individuals, and would also affect corporate
taxation.  In particular,  the proposed reform would reduce,  but not eliminate,
the tax benefits  available to approved  enterprises  such as ours.  The Israeli
cabinet approved the  recommendations  in principle,  but  implementation of the
reform requires  legislation by Israel's Knesset.  In the interim, a new Israeli
government has been formed,  and there are  indications  that the new government
may eliminate  significant  aspects of the proposed reform. We cannot be certain
whether the  proposed  reform  will be adopted,  when it will be adopted or what
form any reform will ultimately take.


The new  Israeli  Companies  Law,  to  which  we are  subject,  has not yet been
interpreted by the courts.

The  new  Israeli  Companies  Law  became  effective  as of  February  1,  2000,
instituting major and  comprehensive  changes to Israeli corporate law. To date,
Israeli courts have not fully reviewed or interpreted  certain important aspects
of the new Israeli Companies Law.  Furthermore,  to date the Israeli Minister of
Justice has promulgated only a portion of the regulations  required to implement
the new  Israeli  Companies  Law.  As a  result,  there  remain  many  questions
concerning the  application  of the law, and  shareholders  instituting  actions
against Israeli companies,  or against their directors,  officers or controlling
shareholders,   may  experience  difficulties,   as  well  as  uncertainties  in
protecting their interests.


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

You should rely only on the information  contained in this  prospectus.  We have
not  authorized  anyone to  provide  you with  information  different  from that
contained in this  prospectus.  We are offering to sell,  and seeking  offers to
buy, ordinary shares only in jurisdictions where offers and sales are permitted.
The information  contained in this prospectus is accurate only as of the date of
this prospectus, regardless of the time of delivery of this prospectus or of any
sale of our ordinary shares.


                              THE OFFER AND LISTING

Ordinary shares offered ............................  4,000,000 shares
Use of proceeds ....................................  Expansion of sales and
                                                      marketing activities;
                                                      capital expenditures;
                                                      expansion of research and
                                                      development activities;
                                                      expansion of international
                                                      operations; working
                                                      capital and other general
                                                      corporate purposes.  See
                                                      "Reasons for Offer and Use
                                                      of Proceeds."

NASDAQ National Market Symbol ......................  CTCH

                                       17


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

Shares will be offered on a registered basis and not as bearer shares.

Except as otherwise  specified,  all  information in this prospectus is based on
the number of shares outstanding as of March 31, 2001, and:


         o     assumes the issuance of 276,744  ordinary  shares  issuable  upon
               exercise of options  granted to executive  officers and directors
               within 60 days of March 31, 2001 at a weighted  average  exercise
               price of $19.21 per share.

         o     with  respect  to  financial  information,  is  reported  in U.S.
               dollars;

and does not include:

         o     1,598,239  ordinary  shares issuable to employees and consultants
               upon exercise of outstanding options under our stock option plans
               and stock  option  agreements  as of March 31, 2001 at a weighted
               average exercise price of $19.36 per share; and

         o     1,878,067  ordinary shares available for future grant or issuance
               under our stock option and stock  purchase  plans as of March 31,
               2001.


Market Information

     Our  ordinary  shares are listed on the Nasdaq  National  Market  under the
symbol  "CTCH".  The annual high and low  reported  sale prices for the ordinary
shares were $66.50 and $3.8125,  respectively,  for fiscal 2000 and were $49.125
and $11.0625,  respectively,  for fiscal 1999 (beginning July 13, 1999, the date
of our initial public  offering).  The high and low reported sale prices for the
ordinary  shares on a  quarterly  basis for 1999 and 2000 and for the six months
preceding the date of this prospectus were as follows:


1999:
  Third Quarter (beginning July 13, 1999)         $ 22.625   $ 11.0625
  Fourth Quarter                                    49.125     14.3125

2000:
  First Quarter                                   $ 66.50    $ 35.5625
  Second Quarter                                    38.5625    14.625
  Third Quarter                                     33.9375    16.50
  Fourth Quarter                                    18.9375     3.8125

Most Recent Six Months:
  December 2000                                      7.25       3.8125
  January 2001                                    $  4.6875  $  2.00
  February 2001                                      3.625      1.25
  March 2001                                         1.0625     0.75
  April 2001                                         0.74       0.49
  May 2001                                           1.69       0.73



                      REASONS FOR OFFER AND USE OF PROCEEDS


We intend to use the proceeds of this offering for the following:

         o     expansion of our sales and marketing activities;

         o     capital expenditures,  including purchase of equipment, primarily
               for our hosting facilities;

                                       18


         o     expansion of research and development activities;

         o     expansion of our international operations; and

         o     working capital and other general corporate purposes.

The amounts and timing of these expenditures will vary  significantly  depending
on a number of  factors,  including,  but not  limited  to,  the  amount of cash
generated by our operations and the market  response to the  introduction of any
new service offerings.  In addition, we may use a portion of the net proceeds of
this  offering from time to time to acquire or invest in  businesses,  products,
services or technologies complementary to our current business, through mergers,
acquisitions,  joint ventures or otherwise.  Accordingly,  our  management  will
retain broad discretion as to the use and allocation of the net proceeds of this
offering.  Pending the above uses,  we intend to invest the net proceeds of this
offering in short-term, interest-bearing investment grade securities.



                          DESCRIPTION OF SHARE CAPITAL


Description of Shares

Set forth  below is a summary of the  material  provisions  governing  our share
capital.  This  summary is not  complete  and should be read  together  with our
Memorandum of Association and Articles of Association, copies of which have been
filed as exhibits  to our Annual  Report on Form 20-F,  as  amended,  subject to
amendment of our Articles of Association from time to time.

As of March 31, 2001,  our  authorized  share  capital  consisted of  40,000,000
ordinary shares, NIS 0.05 par value. As of March 31, 2001, there were 16,970,584
ordinary shares and no preferred shares issued and outstanding.

Description of Ordinary Shares

All issued and outstanding  ordinary shares of Commtouch are duly authorized and
validly issued,  fully paid and  nonassessable.  The ordinary shares do not have
preemptive   rights.   Neither  our  Memorandum  of  Association,   Articles  of
Association  nor  the  laws  of the  State  of  Israel  restrict  in any way the
ownership or voting of ordinary shares by non-residents  of Israel,  except with
respect to subjects of countries which are in a state of war with Israel.

Dividend and Liquidation Rights

The  ordinary  shares  offered by this  prospectus  are  entitled  to their full
proportion  of any  cash  or  share  dividend  declared  from  the  date of this
prospectus.

Subject  to the  rights of the  holders  of shares  with  preferential  or other
special  rights  that may be  authorized,  the  holders of  ordinary  shares are
entitled to receive  dividends in  proportion to the sums paid up or credited as
paid up on account of the  nominal  value of their  respective  holdings  of the
shares in  respect of which the  dividend  is being paid  (without  taking  into
account the  premium  paid up on the  shares)  out of assets  legally  available
therefor  and, in the event of our  winding  up, to share  ratably in all assets
remaining  after  payment of  liabilities  in proportion to the nominal value of
their respective holdings of the shares in respect of which such distribution is
being  made,  subject to  applicable  law.  Our Board of  Directors  may declare
interim  dividends and recommend a final annual dividend only out of profits and
in such  amounts as the Board of Directors  may  determine.  Declaration  of the
final annual dividend requires shareholder approval at a general meeting,  which
may reduce but not increase  such dividend  from the amount  recommended  by the
Board of Directors.

                                       19


In case of a share  dividend,  holders of shares can  receive  shares of a class
whether such class existed  prior  thereto or was created  therefor or shares of
the same  class  that  conferred  upon the  holders  the right to  receive  such
dividend.


Voting, Shareholder Meetings and Resolutions

Holders of  ordinary  shares have one vote for each  ordinary  share held on all
matters submitted to a vote of shareholders.  Such rights may be affected by the
future  grant of any special  voting  rights to the holders of a class of shares
with preferential rights. Once the creation of a class of shares with preference
rights has been  approved,  the Board of Directors may issue  preferred  shares,
unless the Board is limited  from doing so by the Articles of  Association  or a
contractual provision.

An annual  general  meeting must be held once every  calendar  year at such time
(not more than 15 months after the last preceding annual general meeting) and at
such place,  either within or outside the State of Israel,  as may be determined
by the  Board of  Directors.  The  quorum  required  for a  general  meeting  of
shareholders consists of at least two shareholders present in person or by proxy
and holding, or representing,  more than one-quarter of the voting rights of the
issued share capital.  A meeting adjourned for lack of a quorum may be adjourned
to the same day in the next week at the same time and place, or to such time and
place as the Board of Directors may determine.  At such  reconvened  meeting any
two  shareholders  present in person or by proxy  (and not in default  under the
articles)  will  constitute  a quorum.  Shareholder  resolutions  will be deemed
adopted if approved by the holders of a majority of the voting power represented
at the meeting, in person or by proxy, and voting thereon.


Anti-Takeover Provisions Under Israeli Law

Under the  Companies  Law, a merger is generally  required to be approved by the
shareholders  and board of  directors of each of the merging  companies.  If the
share capital of the company that will not be the  surviving  company is divided
into different  classes of shares,  the approval of each class is also required.
The Companies Law provides that the articles of association  of companies,  such
as ours, that were incorporated  prior to February 1, 2000 are deemed to include
a  provision  whereby  the  approval  of a merger  requires a majority  of three
quarters of those present and voting at a general  meeting of  shareholders.  In
addition, a merger can be completed only after all approvals have been submitted
to the Israeli Registrar of Companies and at least seventy days have passed from
the  time  that a  proposal  for  approval  of the  merger  was  filed  with the
Registrar.

The  Companies Law provides that an  acquisition  of shares in a public  company
must be made by means of a tender  offer if as a result of the  acquisition  the
purchaser  would become a 25%  shareholder  of the  company.  This rule does not
apply if there is already another 25% shareholder of the company. Similarly, the
Companies Law provides that an acquisition of shares in a public company must be
made by means of tender offer if as a result of the  acquisition  the  purchaser
would become a 45% shareholder of the company, unless someone else already holds
a majority of the voting power of the  company.  These rules do not apply if the
acquisition  is made  by way of a  merger.  Regulations  promulgated  under  the
Companies  Law provide  that these  tender  offer  requirements  do not apply to
companies whose shares are listed for trading outside of Israel if, according to
the law in the country in which the shares are traded,  including  the rules and
regulations of the stock exchange on which the shares are traded, either:

         o     there is a limitation on  acquisition  of any level of control of
               the company; or

         o     the acquisition of any level of control requires the purchaser to
               do so by means of a tender offer to the public.

                                       20


Finally,   Israeli   tax  law  treats   specified   acquisitions,   including  a
stock-for-stock  swap  between an Israeli  company and a foreign  company,  less
favorably  than does U.S. tax law.  For  example,  Israeli tax law may subject a
shareholder   who  exchanges  his  ordinary  shares  for  shares  in  a  foreign
corporation to immediate taxation.

Transfer of Shares and Notices

Fully paid ordinary  shares are issued in registered form and may be transferred
freely.  Each  shareholder of record is entitled to receive at least seven days'
prior notice of shareholder  meetings.  A special resolution can be adopted only
if  shareholders  are given 21 days'  prior  notice of the meeting at which such
resolution will be voted on (unless all shareholders entitled to vote agree that
the meeting may be held on a shorter notice period). For purposes of determining
the  shareholders  entitled to notice and to vote at such meeting,  the Board of
Directors may fix the record date not exceeding 90 days prior to the date of any
general meeting.

Modification of Class Rights

If at any time the share  capital is divided into  different  classes of shares,
the rights attached to any class (unless  otherwise  provided by our Articles of
Association)  may be modified or abrogated by Commtouch by a special  resolution
subject to the  consent in  writing of the  holders of the issued  shares of the
class, or by the adoption of a special  resolution  passed at a separate general
meeting of the holders of the shares of such class.


Description of Investor Options and Warrants

         InfoSpace/Go2Net Warrant

In connection with the Customized Web-based Email Service Agreement entered into
between  Commtouch and Go2Net  (subsequently  acquired by InfoSpace),  Commtouch
issued  to  InfoSpace  a fully  vested,  non-forfeitable,  warrant  to  purchase
1,136,000  ordinary shares at a per-share  exercise price of $12.80,  subject to
adjustment as provided in the warrant.  The warrant is  exercisable  at any time
until it  expires  on July 16,  2004.  At  InfoSpace's  option,  the  warrant is
exercisable  pursuant to a cashless  exercise based on the average closing price
of the ordinary  shares for the five days  preceding the  exercise.  The Company
extended  registration  rights to InfoSpace  covering the warrant and the shares
issuable upon exercise of the warrant and a registration  statement  relating to
the resale of the shares and the warrant  became  effective  on January 7, 2000.
The  holder of the  warrant  is  required  to avoid  becoming  a 10% or  greater
shareholder of the Company as a result of any exercise of the warrant.

The holder of the warrant is given the  opportunity to profit from a rise in the
market  price of the  ordinary  shares and the  warrant.  The  warrant  includes
provisions  which adjust the exercise and price upon the  occurrence  of certain
events which might otherwise dilute the value of the warrant.

         Wingra Warrants and Options

In connection with our acquisition of Wingra, we assumed warrants and options to
issue  137,232  shares to the Wingra  investors  and  options  to issue  168,383
ordinary shares to Wingra  employees.  Upon  effectiveness of the merger,  these
warrants  and  options  became  immediately  exercisable.  The  137,232  assumed
warrants were  originally  granted by Wingra in connection with loans granted to
Wingra by banks and  shareholders.  The exercise  price of those  warrants range
from $6.29 to $9.35 and the  expiration  dates  range  from  March 2001  through
August 2002.  The 168,383  shares were  originally  granted to Wingra  employees
under the Wingra Technologies,  LLC 1998 Unit Option Plan. The exercise price of
those options range from $0.2010 to $3.5010 and the expiration  dates range from
March 2001 through August 2002. At the time of the merger, we assumed the rights
and obligations under that Option Plan.

Registration Rights

                                       21


The holders of convertible  preferred shares which were converted into 7,109,800
ordinary shares (the "Registrable Securities") upon effectiveness of the initial
public  offering,  have  certain  rights  to  register  those  shares  under the
Securities  Act.  If  requested  by  holders of a  majority  of the  Registrable
Securities  after  the  second  anniversary  of the date of the  initial  public
offering,  Commtouch must file a registration statement under the Securities Act
covering all Registrable  Securities  requested to be included by all holders of
such Registrable Securities.  Commtouch may be required to effect up to two such
registrations.  Commtouch has the right to delay any such registration for up to
120 days under certain circumstances, but not more than once during any 12-month
period.

In addition,  if Commtouch proposes to register any of its ordinary shares under
the Securities Act other than in connection with a company employee benefit plan
or a corporate  reorganization pursuant to Rule 145 under the Securities Act, or
a registration on any registration  form that does not permit secondary sales or
does not include  substantially  the same information as would be required to be
included  in  a  registration   statement   covering  the  sale  of  Registrable
Securities,  the holders of  Registrable  Securities  may require  Commtouch  to
include  all or a portion of their  shares in such  registration,  although  the
managing underwriter of any such offering has certain rights to limit the number
of shares in such registration.

Further,  a  majority  of the  holders of  Registrable  Securities  may  require
Commtouch to register all or any portion of their Registrable Securities on Form
F-3,  subject to certain  conditions and limitations.  All expenses  incurred in
connection with all registrations  (other than fees,  expenses and disbursements
of counsel retained by the holders of the Registrable  Shares, and underwriters'
and brokers' discounts and commissions) will be borne by Commtouch.

The registration  rights described in the preceding three paragraphs expire five
years after the closing date of our initial public offering, which will occur on
July 16, 2004.

In  addition,  the Company  granted  registration  rights to  InfoSpace,  Vulcan
Ventures  and  Microsoft  pursuant  to  which  their  holdings  in  the  Company
(including the warrant issued to Go2Net) were registered on January 7, 2000.

Also, under the terms of the Wingra  acquisition  agreement,  we are required to
register the  1,590,909  shares  issuable to the Wingra  investors and employees
(which includes the shares underlying options and warrants described above).


Access to Information

We file reports with the Israeli Registrar of Companies regarding our registered
address,  our registered  capital,  our shareholders of record and the number of
shares  held by each,  the  identity  of the  directors  and  details  regarding
security  interests  on our assets.  In addition,  Commtouch  must file with the
Israeli  Registrar of Companies  its Articles of  Association  and a copy of any
special resolution adopted by a general meeting of shareholders. The information
filed with the Registrar of Companies is available to the public. In addition to
the information  available to the public,  our shareholders  are entitled,  upon
request,  to  review  and  receive  copies of all  minutes  of  meetings  of our
shareholders.

Transfer Agent and Registrar

The  transfer  agent  and  registrar  for our  ordinary  shares  is Wells  Fargo
Minnesota N.A.


                         SHARES ELIGIBLE FOR FUTURE SALE

                                       22


Future sales of substantial amounts of our ordinary shares in the public market,
or the possibility of these sales occurring,  could adversely affect  prevailing
market  prices for our ordinary  shares or our future  ability to raise  capital
through an offering of equity securities.

As of  March  31,  2001  we had  16,970,584  ordinary  shares  outstanding.  The
3,450,000  ordinary shares sold in our initial public offering and the 1,344,086
ordinary  shares and the warrant  exercisable  for 1,136,000  ordinary shares of
InfoSpace  and Vulcan  Ventures,  as well as  707,965  ordinary  shares  held by
Microsoft  Corporation,  are  freely  tradable  in  the  public  market  without
restriction under the Securities Act, unless the shares are held by "affiliates"
of the Company, as that term is defined in Rule 144 under the Securities Act. In
addition,  the 4,000,000  shares to which this  prospectus  relates will also be
freely tradeable without restriction,  unless otherwise indicated in the related
prospectus supplement.

In  connection  with our  acquisition  of  Wingra,  we issued  1,285,294  of our
ordinary shares to the Wingra investors,  and as noted above we assumed warrants
to issue an additional  137,232  shares to those  investors and options to issue
168,383  ordinary  shares to Wingra  employees.  Further,  20% of the  1,590,909
shares  issued or  issuable in  connection  with our  acquisition  of Wingra are
subject to an agreement between us and the Wingra investors which prohibits each
of them from transferring,  selling or otherwise disposing of these shares until
December 20, 2001. I addition,  5% of these 1,590,909  shares are held in escrow
until December 5, 2001 in connection  with payment of possible  future claims by
us arising out of the acquisition.  We are required to register these shares and
intend to file a  registration  statement  shortly.  Upon  effectiveness  of the
registration,  the  shares can be freely  traded  (subject  to the  restrictions
noted) which could adversely impact our share price.

The remaining  ordinary shares outstanding upon completion of this offering will
be "restricted securities" as that term is defined under Rule 144. We issued and
sold  these  restricted  securities  in  private  transactions  in  reliance  on
exemptions from registration under the Securities Act. Restricted securities may
be sold in the public market only if they are  registered or if they qualify for
an exemption from  registration  under Rule 144 or Rule 701 under the Securities
Act, as summarized below.


Shares Subject to Restriction under Rule 144

Most of the  restricted  shares are subject to certain  volume and other  resale
restrictions  pursuant  to Rule  144  because  the  holders  are  affiliates  of
Commtouch.  In general,  under Rule 144, an affiliate of Commtouch,  or a person
(including a group of related persons whose shares must be aggregated  under the
Rule) who has beneficially  owned restricted  shares for at least one year, will
be entitled to sell in any  three-month  period a number of shares that does not
exceed the greater of

         o     1% of the then outstanding ordinary shares (approximately 170,877
               shares immediately following completion of the offering), or

         o     the average  weekly trading volume during the four calendar weeks
               preceding  the date on which notice of the sale is filed with the
               Commission.

Sales  pursuant  to Rule 144 are  subject to certain  requirements  relating  to
manner of sale,  notice and  availability  of current public  information  about
Commtouch. A person who was not an affiliate of Commtouch for 90 days before the
sale and who has  beneficially  owned the shares for at least two years may sell
under Rule 144(k) without regard to the above limitations.





Shares Under Employee Benefit Plans

                                       23


On  January  20,  2000,  we filed a Form S-8  registration  statement  under the
Securities Act to register 5,400,000 ordinary shares issuable in connection with
option  exercises  and shares  reserved for  issuance  under all stock plans and
agreements as well as 150,000 ordinary shares under the Company's Employee Stock
Purchase  Plan which the Company may issue to employees  from time to time.  The
Company also issues  employee and director stock options from time to time. Such
options are subject to vesting  periods  after which the shares may be resold by
the holders,  subject to Rule 144 limitations if the holder is an affiliate.  Of
2,476,919  options issued,  778,442 option shares were vested and unexercised as
of March 31, 2001 and  1,145,014  options had been  exercised.  The Company will
file another Form S-8 registration  statement to register an additional  250,000
of our ordinary shares, reserved for issuance under the Company's director stock
option  plan,  as  approved  by our  shareholders  on August 10, 2000 as well as
additional  shares issuable under our Employee Stock Purchase Plan. In addition,
the Company will file a Form S-8  registration  statement to register 168,383 of
its shares  underlying  options  issuable to employees of Wingra pursuant to the
terms of the Wingra merger agreement.

On April 30, 2001 our Board of Directors approved the "repricing" of outstanding
stock options previously granted to employees, contingent upon the completion of
certain regulatory filings. Previously granted options will be cancelled and new
options  will be issued  with an  exercise  price  equal to the par value of the
shares. Options subject to the repricing must have an original exercise price of
more than $10 per share and must be currently unexercised. The options will vest
over three  years with 1/3 vesting on February  15, 2002 and the  remaining  2/3
vesting every six months for the next two years.  After  regulatory  filings are
completed,  if these repriced  options are issued the decreased  option exercise
price may cause optionees to exercise options  immediately and resell the shares
received in the exercise on the open market,  which may cause downward  pressure
on the price of the shares.


Additional Restrictions

In  addition  to the  restrictions  imposed  by  the  securities  laws,  662,680
restricted  shares were issued to certain  Commtouch  employees under agreements
which give  Commtouch  Inc. a  repurchase  option on any  unvested  shares.  The
repurchase option lapses ratably over time. As of March 31, 2001,  approximately
101,907 ordinary shares are subject to repurchase.


                              PLAN OF DISTRIBUTION

We may sell ordinary shares through underwriters, dealers or agents, directly to
one or more purchasers,  or by means of both of these methods. We may distribute
ordinary  shares from time to time in one or more  transactions at a fixed price
or prices (which may be changed from time to time), at market prices  prevailing
at the time of sale, at prices related to these prevailing  market prices, or at
negotiated prices.

Regardless of the method we use to sell our ordinary  shares,  we will provide a
prospectus or prospectus supplement pursuant to Rule 424(b) under the Securities
Act of 1933 (the "Securities Act") that will disclose:

         o     the identity of any  underwriters,  dealers,  agents or investors
               who purchase ordinary shares, as required;

         o     the  number  of  shares  sold,  the  public  offering  price  and
               consideration  paid,  and the  proceeds we will  receive from the
               sale;

         o     the amount of any  compensation,  discounts or  commissions to be
               received by underwriters, dealers or agents;

         o     the   terms   of   any   idemnification   provisions,   including
               indemnification  from  liabilities  under the federal  securities
               laws; and

                                       24


         o     any other  material  terms of the  distribution  of the  ordinary
               shares.

Use of Underwriters and Agents

Only underwriters  named in a prospectus or prospectus  supplement,  if any, are
underwriters  of the ordinary  shares offered with that prospectus or prospectus
supplement. If underwriters are used in the sale, they will acquire the ordinary
shares for their own  account  and may resell the  ordinary  shares from time to
time in one or more  transactions at a fixed public offering price or at varying
prices  determined at the time of sale. We may offer the ordinary  shares to the
public through underwriting  syndicates  represented by managing underwriters or
by  underwriters  without  a  syndicate.  Subject  to  certain  conditions,  the
underwriters  will be obligated to purchase all the ordinary  shares  offered by
the prospectus  supplement in which they are named,  if any. Any public offering
price and any discounts or  concessions  allowed or reallowed or paid to dealers
may change from time to time.

We may sell the ordinary  shares  through agents we designate from time to time.
We will name any agent involved in the offering and sale of ordinary  shares and
in the  prospectus  supplement we will describe any  commissions we will pay the
agent. Unless the prospectus supplement states otherwise,  our agent will act on
a best-efforts basis for the period of appointment.

We may authorize  agents or  underwriters  to solicit offers by certain types of
institutional  investors  to purchase  the  ordinary  shares from us pursuant to
delayed  delivery  contracts  providing  for payment and delivery on a specified
date in the future.  We will list the public  offering price for any such shares
and describe the conditions to these  contracts and the  commissions we must pay
for solicitation of these contracts in a prospectus supplement.

In connection with the sale of the ordinary  shares offered by this  prospectus,
underwriters,  dealers  or  agents  may  receive  compensation  from  us or from
purchasers of the ordinary  shares for whom they may act as agents,  in the form
of discounts,  concessions or commissions. Agents and underwriters may engage in
transactions  with us, or perform  services  for us, in the  ordinary  course of
business.

Sales Directly to Purchasers

We may  enter  into  agreement  directly  with  one  or  more  purchasers.  Such
agreements  may provide for the sale of our  ordinary  shares at a fixed  price,
based on the market price of the ordinary  shares or  otherwise.  Alternatively,
such agreement may provide for the sale of ordinary shares over a period of time
by means of draw downs at our election which the purchaser would be obligated to
accept under  specified  conditions.  Under this form of agreement,  we may sell
ordinary  shares at a per share  purchase  price  which is  discounted  from the
market price. Such agreement may also provide for sales of ordinary shares based
on combinations of or variations from these methods.

Deemed Underwriters

The  underwriters,  dealers,  agents  or  purchasers  that  participate  in  the
distribution of the ordinary  shares may be deemed to be underwriters  under the
Securities Act. Broker-dealers or other persons acting on behalf of parties that
participate in the  distribution of the ordinary shares may also be deemed to be
underwriters.  Any discounts or  commissions  received by them and any profit on
the  resale  of the  ordinary  shares  received  by  them  may be  deemed  to be
underwriting  discounts and commissions  under the Securities Act. Anyone deemed
to be an  underwriter  under the  Securities  Act may be  subject  to  statutory
liabilities,  including Sections 11, 12 and 17 of the Securities Act and Section
10(b) and Rule 10b-5 under the  Securities  Exchange Act of 1934 (the  "Exchange
Act").

Underwriters  or  purchasers  that  would  be  deemed   underwriters  under  the
Securities Act, and their  pledgees,  donees,  transferees and other  subsequent
owners,  may offer the ordinary shares at various times in the  over-the-counter
market  or in  privately  negotiated  transactions,  at a fixed  price or prices

                                       25


(which may be changed from time to time),  prevailing  market prices at the time
of sale, at prices related to those prevailing  market prices,  or at negotiated
prices.  These  sales  may be made  according  to one or  more of the  following
methods:

         o     ordinary  brokerage  transactions  and  transactions in which the
               broker solicits purchasers;

         o     block  trades in which the  broker  or  dealer  so  engaged  will
               attempt to sell the ordinary shares as agent but may position and
               resell a portion of the block as principal in order to facilitate
               the transaction;

         o     purchases  by a broker or dealer as  principal  and resale by the
               broker  or  dealer  for  its   account  as  allowed   under  this
               prospectus, including resale to another broker or dealer;

         o     exchange distributions under the rules of the exchange;

         o     negotiated  transactions between sellers and purchasers without a
               broker-dealer; and

         o     by writing options.

These  underwriters  or purchasers may also sell the ordinary  shares under Rule
144, instead of under this prospectus, if Rule 144 is available for those sales.

Underwriters  and purchasers that are deemed  underwriters  under the Securities
Act may engage in transactions that stabilize,  maintain or otherwise affect the
price  of the  ordinary  shares,  including  the  entry of  stabilizing  bids or
syndicate  covering  transactions  or  the  imposition  of  penalty  bids.  Such
purchasers  will be subject to the  applicable  provisions of the Securities Act
and Exchange Act and the rules and regulations thereunder,  including Rule 10b-5
and Regulation M. Regulation M may restrict the ability of any person engaged in
the  distribution of the ordinary shares to engage in  market-making  activities
with respect to the ordinary shares. In addition,  the  anti-manipulation  rules
under the Exchange Act may apply to sales of the ordinary  shares in the market.
All of the foregoing may affect the marketability of the ordinary shares and the
ability of any person to engage in market-making  activities with respect to the
ordinary shares.

Expenses Associated with Registration

We are paying  substantially  all of the  expenses of  registering  the ordinary
shares under the Securities Act and of compliance with blue sky laws,  including
registration and filing fees, printing and duplication expenses,  administrative
expenses,  Israeli  Stamp duty and our legal and  accounting  fees.  We estimate
these  expenses to be  approximately  $1,034,507,  which  include the  following
categories of expenses:

    SEC registration fee..............................     $   20,757
    Nasdaq National Market filing fee.................         17,500
    Blue Sky fees and expenses........................         10,000
    Printing and engraving expenses...................         50,000
    Israeli Stamp Duty................................        786,250
    Legal fees and expenses...........................         50,000
    Accounting fees and expenses......................         50,000
    Transfer agent and registrar fees and expenses....         10,000
    Miscellaneous expenses............................         40,000


Indemnification and Contribution

We may provide agents, underwriters or purchasers with indemnification against
civil   liabilities,   including   liabilities  under  the  Securities  Act,  or
contribution  with  respect  to  payments  that  the  agents,   underwriters  or
purchasers may make with respect to such liabilities.

                                       26


Insofar as indemnification  for liabilities  arising under the Securities Act of
1933  may be  permitted  to  directors,  officers  or  persons  controlling  the
registrant pursuant to the foregoing  provisions,  we have been informed that in
the opinion of the Securities and Exchange  Commission such  indemnification  is
against public policy as expressed in the Act and is therefore unenforceable.


                                  LEGAL MATTERS

Certain  legal  matters with respect to United  States law are being passed upon
for  Commtouch  by  McCutchen,  Doyle,  Brown &  Enersen,  LLP,  San  Francisco,
California.  The validity of the ordinary  shares offered hereby is being passed
upon for Commtouch by Naschitz, Brandes & Co., Tel-Aviv, Israel. The partners of
Naschitz, Brandes & Co. and McCutchen,  Doyle, Brown & Enersen, LLP beneficially
own, in the aggregate, less than 1% of the outstanding shares of the Company.


                                     EXPERTS

Kost,  Forer &  Gabbay,  a member  of Ernst & Young  International,  independent
auditors,  have audited our consolidated  financial  statements  included in our
Annual report on Form 20-F for the year ended December 31, 2000, as amended,  as
set forth in their report, which is incorporated by reference in this prospectus
and  elsewhere in the  registration  statement.  Our  financial  statements  are
incorporated by reference in reliance on Kost, Forer and Gabbay's report,  given
on their authority as experts in accounting and auditing.


                       WHERE YOU CAN FIND MORE INFORMATION

We have filed a  registration  statement on Form F-3 with the SEC for the shares
and warrant we are offering by this prospectus. This prospectus does not include
all of the information contained in the registration statement. You should refer
to the  registration  statement  and its  exhibits for  additional  information.
Whenever  we  make  reference  in  this  prospectus  to any  of  our  contracts,
agreements or other documents,  the references are not necessarily  complete and
you should  refer to the exhibits  attached to the  registration  statement  for
copies of the actual contract, agreement or other document.

We are required to file annual and special  reports and other  information  with
the SEC. You can read our SEC filings,  including  the  registration  statement,
over the Internet at the SEC's web site at http://www.sec.gov. You may also read
and copy any document we file with the SEC at its public reference facilities at
450 Fifth Street,  NW, Washington,  DC 20549, 7 World Trade Center,  Suite 1300,
New York, New York 10048 and Citicorp  Center,  500 West Madison  Street,  Suite
1400, Chicago, Illinois 60661-2511.  You may also obtain copies of the documents
at prescribed rates by writing to the Public Reference Section of the SEC at 450
Fifth Street,  NW, Washington,  DC 20549.  Please call the SEC at 1-800-SEC-0330
for further information on the operation of the public reference facilities. Our
SEC filings are also available at the office of the Nasdaq National Market.  For
further  information  on  obtaining  copies of our public  filings at the Nasdaq
National Market, you should call (212) 656-5060.

We are subject to certain of the informational requirements of the Exchange Act.
As a "foreign  private  issuer," we are exempt from the rules under the Exchange
Act  prescribing  certain  disclosure  and  procedural  requirements  for  proxy
solicitations and our officers,  directors and principal shareholders are exempt
from the reporting and  "short-swing"  profit recovery  provisions  contained in
Section 16 of the Exchange  Act,  with respect to their  purchases  and sales of
ordinary shares. In addition,  we are not required to file quarterly reports, or
to file annual and current reports and financial  statements with the Securities
and Exchange  Commission as frequently  or as promptly as U.S.  companies  whose
securities are  registered  under the Exchange Act.  However,  we intend to file
with the  Securities and Exchange  Commission,  within 180 days after the end of
each fiscal year, an annual report on Form 20-F containing  financial statements
that  will be  examined  and  reported  on,  with  an  opinion  expressed  by an

                                       27


independent accounting firm, as well as quarterly reports on Form 6-K containing
unaudited  financial  information  for the first  three  quarters of each fiscal
year, within 60 days after the end of each such quarter.


                      INFORMATION INCORPORATED BY REFERENCE

The  SEC  allows  us  to  "incorporate  by  reference"   information  into  this
prospectus.  This means that we can  disclose  important  information  to you by
referring you to another  document filed by us with the Commission.  Information
incorporated  by reference is deemed to be part of this  prospectus,  except for
any information superseded by this prospectus or by information we file with the
Commission in the future.

The following documents are incorporated by reference:

(a) Our Annual Report on Form 20-F for the fiscal year ended  December 31, 2000,
as amended;

(b) Our two  reports  on Form 6-K for the month of May 2001  filed May 29,  2001
(containing  quarterly information for the quarter ended March 31, 2001) and May
31, 2001 (reporting our transaction with Rideau Ltd. and other matters); and

(c)  The  description  of our  ordinary  shares  contained  in the  registration
statement  under the  Exchange Act on Form 8-A as filed with the  Commission  on
June 25, 1999, and any  subsequent  amendment or report filed for the purpose of
updating this description.

In  addition,  all  subsequent  annual  reports  filed on Form 20-F prior to the
termination of this offering are incorporated by reference into this prospectus.
Also, we may  incorporate by reference our future reports on Form 6-K by stating
in  those  Forms  that  they are  being  incorporated  by  reference  into  this
prospectus.

We will provide without charge to any person (including any beneficial owner) to
whom this prospectus has been delivered, upon oral or written request, a copy of
any document incorporated by reference in this prospectus but not delivered with
the prospectus  (except for exhibits to those documents unless a document states
that one of its  exhibits  is  incorporated  into  the  document  itself).  Such
requests should be directed to Sunil  Bhardwaj,  Chief  Financial  Officer,  c/o
Commtouch Inc., 2029 Stierlin Court, Mountain View, California  94043-4655.  Our
corporate  website address is  http://www.commtouch.com.  The information on our
website is not intended to be a part of this prospectus.


                       ENFORCEABILITY OF CIVIL LIABILITIES

We are  incorporated  in  Israel,  and  most of our  directors  and  many of the
executive officers and the Israeli experts named herein are not residents of the
United States and  substantially  all of their assets and our assets are located
outside  the  United  States.  Service  of process  upon our  non-U.S.  resident
directors  and  executive  officers  or the  Israeli  experts  named  herein and
enforcement  of  judgments  obtained  in the United  States  against us, and our
directors and executive  officers,  or the Israeli experts named herein,  may be
difficult to obtain within the United  States.  Commtouch Inc. is the U.S. agent
authorized to receive service of process in any action against us arising out of
this offering or any related  purchase or sale of securities.  We have not given
consent for this agent to accept service of process in connection with any other
claim.

We have been informed by our legal counsel in Israel,  Naschitz,  Brandes & Co.,
that  there is doubt as to the  enforceability  of civil  liabilities  under the
Securities  Act or the Exchange Act in original  actions  instituted  in Israel.
However,  subject to certain time  limitations,  an Israeli  court may declare a
foreign civil judgment enforceable if it finds that:

 * the judgment was rendered by a court which was, according to the laws of

                                       28


   the state of the court, competent to render the judgment,

 * the judgment is no longer appealable,

 * the obligation imposed by the judgment is enforceable  according to the rules
   relating to the  enforceability  of judgments in Israel and the  substance of
   the judgment is not contrary to public policy, and

 * the judgment is executory in the state in which it was given.

Even if the above conditions are satisfied,  an Israeli court will not enforce a
foreign  judgment  if it was given in a state  whose laws do not provide for the
enforcement of judgments of Israeli courts (subject to exceptional  cases) or if
its  enforcement is likely to prejudice the sovereignty or security of the State
of Israel. An Israeli court also will not declare a foreign judgment enforceable
if (i) the judgment was obtained by fraud, (ii) there was no due process,  (iii)
the judgment was rendered by a court not competent to render it according to the
laws of private  international  law in Israel,  (iv) the judgment is at variance
with another judgment that was given in the same matter between the same parties
and which is still  valid,  or (v) at the time the  action  was  brought  in the
foreign court a suit in the same matter and between the same parties was pending
before a court or tribunal in Israel.  Judgments rendered or enforced by Israeli
courts will generally be payable in Israeli currency.  Judgment debtors bear the
risk associated with converting  their awards into foreign  currency,  including
the risk of unfavorable exchange rates.

                                       29


















                            4,000,000 Ordinary Shares




                             COMMTOUCH SOFTWARE LTD.



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

                                   PROSPECTUS

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




                                  May 31, 2001