TheStreet 10-K 2007 FY Annual report

EXHIBIT 32.1

CERTIFICATION OF CEO 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 on Form 10-K of TheStreet.com, Inc. (the “Company”) for the year ended December 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas J. Clarke, Jr., Chief Executive Officer of the Company, hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(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 results of operations of the Company.

/s/ Thomas J. Clarke, Jr.

Thomas J. Clarke, Jr.

Chairman of the Board and

Chief Executive Officer

March 14, 2008