Comscore Announces Availability of AdEffx Campaign Essentials™ in Latin America

Recent AdXpose® Acquisition Enables Truly Comprehensive End-to-End Campaign Validation

Mexico City, Mexico, August 24, 2011 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today announced the availability of AdEffx Campaign Essentials™ in Latin America. Campaign Essentials is Comscore’s campaign audience validation tool, which is used by digital marketers, agencies and publishers alike to verify the accuracy of audiences targeted in digital campaigns. The service features an interactive dashboard with several highly sought functions for digital media planning and evaluation, including daily reporting of campaign demographics and traditional post-buy metrics such as Reach / Frequency and GRPs.

“As online advertising spend continues to grow in Latin America, the need for real-time campaign evaluation becomes increasingly important to ensure the best return on digital investment,” said Alejandro Fosk, Comscore senior vice president for Latin America. “Comscore Campaign Essentials enables our clients to confidently verify that their online campaigns were delivered to the intended audience with the desired reach and frequency. True visibility into campaign audiences will benefit advertisers, agencies and publishers alike in this growing digital marketplace.”

Comscore AdEffx Campaign Essentials was first introduced in 2009 to the United States, and today is also available in Europe, Canada and Latin America. The recent acquisition of AdXpose®, a U.S.-based leader in campaign verification, optimization and brand safety, further enhances Comscore’s Campaign Essentials offering by enabling the development of a truly comprehensive, end-to-end validation solution. Campaign Essentials and the AdXpose offerings are currently both available in Latin America, providing marketers, agencies and publishers with the ability to leverage key synergistic benefits of the solutions, such as:

• Measurement of audience reach and the frequency for specific media buys
• Understanding of the demographic composition of specific audiences reached by a campaign
• Effectiveness of impressions that were actually seen, as opposed to those that were served tracking pixels but never actually seen by a consumer
• Optimizing placements and creatives based on performance, using real-time bidding platforms and online campaign alerting
• Comparing the performance of online and offline media plans using the same post-buy measures used in TV, such as reach, frequency and GRPs
• Creating custom segmentation to allow for reporting of specific audience target groups
• Evaluation of the safety of ad placement and effectiveness of brand messages in different contexts
• Insight into consumer engagement with ads

Clients Voice Support for Campaign Essentials

“Comscore is the most trusted name in digital audience measurement in Mexico. With the introduction of Campaign Essentials, we have no doubt that Comscore will bring the same reliable and trusted standards to digital campaign verification and evaluation,” said Nelson Ramirez, Digital Sr. Director Starcom MediaVest Mexico.

“Visibility into the actual demographic composition of campaign audiences will be extremely valuable in optimizing media buys, while the ability to utilize traditional post-buy metrics will provide seamless comparison with offline media plans,” said Karina Besprosvan, Regional Director Research & Consumer Behavior Latin America, OmnicomMediaGroup. “Campaign Essentials answers the call for a media planning tool that will help advance the digital advertising industry in Latin America.”

For more information about Comscore AdEffx Campaign Essentials, please email learnmore@comscore.com.

About Comscore

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

Cautionary Note Regarding Forward-Looking Statements

This release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including, but not limited to, expectations regarding the impact and benefits to Comscore of the Comscore AdEffx™ Campaign Essentials product, financial or otherwise. These statements involve risks and uncertainties that could cause our actual results to differ materially, including, but not limited to: the features and characteristics of the products, the rate of development of the digital marketing intelligence, Internet advertising and e-Commerce markets; the growth of the Internet as a medium for commerce, content, advertising and communications; and the acceptance of new products and methodologies by the industry, including existing and prospective clients.

For a detailed discussion of these and other risk factors, please refer to Comscore's most recent respective Quarterly Reports on Form 10-Q, Annual Reports on Form 10-K and from time to time other filings with the Securities and Exchange Commission (the "SEC"), which are available on the SEC's Web site (http://www.sec.gov).

Stockholders of Comscore are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date such statements are made. Comscore does not undertake any obligation to publicly update any forward-looking statements to reflect events, circumstances or new information after the date of this press release, or to reflect the occurrence of unanticipated events.