Exhibit 23.1 Consent of Independent Accountants We hereby consent to the incorporation by reference in the Registration Statement of Renaissance Worldwide, Inc. on Forms S-8 (Files No. 333-17565, 333- 33475 and 333-44371), of our report dated March 12, 1998, relating to the financial statements of Neoglyphics Media Corporation, appearing in this Form 8- K/A. /s/ KATCH, TYSON & COMPANY Northfield, IL June 12, 1998