Exhibit 23 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors CoActive Marketing Group, Inc. We hereby consent to incorporation by reference in the registration statements (Nos. 333-02392 and 333-100563 on Form S-8 and Nos. 333-60157 and 333-31934 on Form S-3) of CoActive Marketing Group Inc. (formerly Inmark Enterprises, Inc.) filed with the Securities and Exchange Commission of our report dated July 13, 2004, except for Note 7 which is as of July 22, 2004, on the consolidated financial statements and schedule of CoActive Marketing Group, Inc. and subsidiaries appearing in the Annual Report on Form 10-K as of and for the year ended March 31, 2004. /s/ BDO SEIDMAN, LLP - --------------------------- BDO Seidman, LLP Melville, New York July 13, 2004, except for Note 7 which is as of July 22, 2004.