U.K. Media Agencies Rely on comScore Media Metrix Data for Online Media Planning, Buying and Analysis

U.K. Agencies Ran More than 275,000 comScore Reports in 2009, Ending the Year Up 51 Percent Versus 2008

LONDON, January 14 - comScore, Inc. (Nasdaq: SCOR), a leader in measuring the digital world,
today revealed that 45 U.K. media agencies, including business units of each
of the five major agency holding companies, ran more than 275,000 comScore
reports in 2009. This represents approximately 23,000 reports per month, or
500 reports per month per agency. The annual total represents a 45 percent
increase over 2008 with December 2009 usage up 51 percent versus year ago.

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Use of comScore's data by U.K. media agencies has helped support the
growth of online advertising in the U.K., which now exceeds marketers'
investment in television. comScore Media Metrix is a preferred source of
digital marketing intelligence, used by approximately three-quarters of the
U.K. media agency market, and subscribed to by 75 percent of agencies who use
The Institute of Practitioners in Advertising (IPA) Touchpoints service.

"The Internet cemented its place amongst the U.K.'s leading advertising
mediums in 2009 - increasing its share of total ad-spend beyond that of
television," said Mike Read, SVP and managing director of comScore Europe.
"The extremely heavy and growing agency usage of comScore intelligence
illustrates the importance of the comScore data platform to the digital media
industry for campaign planning and buying processes. comScore is committed to
working with the industry to increase the flow of ad-spend online even
further, and with the introduction of our new Ad Metrix service, which tracks
delivered online ad impressions by publisher and advertiser, we now offer the
most comprehensive and cost effective suite of digital measurement services
to support the industry's continued growth."

Agencies Voice Support of comScore Services

"Mediacom's clients operate in a very competitive environment and we are
constantly evaluating how they can improve digital engagement, through
enhanced digital marketing intelligence," said Ivan Fernandes, Head of Data
Planning for Mediacom. "comScore is an expert in the area of digital
measurement and its offerings satisfied our need for a smart reporting,
real-time rich insights solution within a service oriented framework."

"OMG Agencies find comScore reports and data a hugely important part of
the planning and buying process and we welcome comScore's continued
innovation in the digital audience measurement space," said Neil Mortensen,
Research Director, Opera OMG.

"We use the comScore audience measurement tools on a global basis to
research potential sites for our client's campaigns," said Hanne
Tuomisto-Inch, Online Communications Director for Banner. "The ability to use
the behavioural data on heavy users of, for example, business and technology
content, has been especially important and very insightful in a market where
there is a lack of research on business decision-maker audiences."

"At Nexus/H we find comScore data invaluable in ensuring we can offer our
clients the same level of digital insight as many of the London-based
agencies," said Dwight Thomas, Media Director at Nexus/H. "We are not
surprised to learn of the huge usage comScore reports generate, the interface
is very easy to use and it takes no time at all to get used to running
reports."

"As a full-service digital agency we rely on data and insights from
comScore in helping us to measure and understand the impact of different
digital channels on each other," said Emma Wilson, Managing Director at
Harvest Digital.

About comScore

comScore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital
world and preferred source of digital marketing intelligence. For more
information, please visit www.comscore.com/companyinfo

Jamie Gavin of comScore, Inc., +44-(0)-207-099-1775, worldpress at comscore.com