Exhibit 99.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER PERSUANT TO 18U.S.C.SECTION 1350 AS ADOPTED PERSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 I, Guido D. DiGregorio, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly report of Communication Intelligence Corporation on Form 10-Q for the quarterly period ended June 30, 2002 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such quarterly report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Communication Intelligence Corporation. August 14, 2001 /s/ Guido D. DiGregorio - ---------------------- ------------------------------------------------ Date Guido D. DiGregorio (Chairman, President and Chief Executive Officer) I, Francis V. Dane, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly report of Communication Intelligence Corporation on Form 10-Q for the quarterly period ended June 30, 2002 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such quarterly report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Communication Intelligence Corporation. August 14, 2001 /s/ Francis V. Dane - ---------------------- ------------------------------------------------ Date Francis V. Dane (Vice President, Chief Legal and Financial Officer)