<PAGE> 1
EXHIBIT 99.6
CONSENT OF JEFFREY BALLOWE TO APPOINTMENT AS DIRECTOR
Reference is made to the Registration Statement on Form S-4, and to the Joint
Proxy Statement/Prospectus which forms a part thereof (together, the
"Registration Statement"), to be filed with the Securities and Exchange
Commission by Media Metrix, Inc. in connection with its combination with Jupiter
Communications, Inc. In accordance with Rule 438 under the Securities Act of
1933, as amended, the undersigned hereby consents to being named in the
Registration Statement, and any subsequent amendments thereto, as a person who
is about to become a director of Media Metrix, Inc.
/s/ JEFFREY BALLOWE
--------------------------------------
Name: Jeffrey Ballowe
August 4, 2000
