Exhibit 32.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                       SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection  with the Annual  Report of Attunity Ltd. (the  "Company") on Form
20-F for the period ending  December 31, 2003 as filed with the  Securities  and
Exchange  Commission  on the date hereof (the  "Report"),  I, Arie Gonen,  Chief
Executive  Officer of the Company,  certify,  pursuant to 18 U.S.C. ss. 1350, as
adopted pursuant to ss. 906 of the Sarbanes-Oxley Act of 2002, that:

        (1) The Report fully complies with the  requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

        (2) The  information  contained in the Report  fairly  presents,  in all
material  respects,  the  financial  condition  and result of  operations of the
Company.


/s/Arie Gonen*
- --------------
Arie Gonen
Chief Executive Officer

June 30, 2004

* The originally  executed copy of this  Certification will be maintained at the
Company's offices and will be made available for inspection upon request.