Exhibit 99.1

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 Quarterly Report on Form 10-Q of MicroStrategy Incorporated (the “Company”) for the period ended September 30, 2002 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, the Chief Executive Officer of the Company and the Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge on the date hereof:

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

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

Dated:  November 12, 2002	/s/  MICHAEL J. SAYLOR
	Michael J. Saylor Chairman of the Board of Directors and Chief Executive Officer

Dated:  November 12, 2002	/s/  ERIC F. BROWN
	Eric F. Brown President and Chief Financial Officer