MasterCard and Ariba Join Forces to Automate Integration of Corporate and Purchasing Card Programs for Companies Around the World

PURCHASE, NY and SUNNYVALE, CA, December 14, 2006 - MasterCard Worldwide, the leading global payment solutions company and Ariba, Inc. (Nasdaq: ARBA), the leading spend management solutions provider, today announced an agreement to enhance payment solutions for companies around the world. Under this agreement, Ariba and MasterCard will connect enhanced transaction data from the MasterCard global data repository with Ariba Supplier Network™, resulting in integration of purchasing and corporate card programs available for companies globally.

By combining enhanced data from the MasterCard global data repository with Ariba Supplier Network, companies will be able to eliminate many of the inefficiencies commonly associated with invoice reconciliation and expense reporting, streamline reconciliation and accounts payable processing, improve control over maverick spending, and enhance overall policy compliance.

"Our leadership in building integration solutions has made it possible for many companies to optimize their corporate card programs, but this innovative alliance extends those cost and time savings to their purchasing card programs. Now, companies with MasterCard Corporate and Purchasing card programs will have a single seamless and automated way to further optimize those programs." said Steve Abrams, Group Executive, Global Commercial Products, MasterCard Worldwide. "Purchasing card programs are coming under increasing corporate scrutiny, and industry research shows that 69% of companies expect purchasing card spending to increase or significantly increase over the next three years, according to a 2005 Purchasing Card Benchmark Survey Report by RPMG Research. As a pioneer in the integration of corporate card data, we are pleased to work with Ariba to further help companies optimize programs and uncover untapped savings."

"Companies do not want separate tools for Pcard purchase orders, Pcard and corporate card reporting, and reconciliation. They want integrated, streamlined Procure-to-Pay solutions," said Bob Solomon, Senior Vice President, Growing Enterprise Business, Ariba. "The integration of MasterCard enhanced data with Ariba Supplier Network allows companies with MasterCard Corporate and Purchasing card programs to reconcile their card-based transactions with their procurement tools and deliver on the promise of fewer systems to manage and easier processes."

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Contacts
Aparna Mohan, MasterCard Worldwide,914-249-6528,aparna_mohan@mastercard.com
Karen Master, Ariba, Inc., 412-297-8177, kmaster@ariba.com

About MasterCard Worldwide
MasterCard Worldwide advances global commerce by providing a critical economic link between financial institutions, businesses, cardholders and merchants worldwide. As a franchisor, processor and advisor, MasterCard develops and markets payment solutions, processes close to 14 billion payments each year, and provides industry-leading analysis and consulting services to financial institution customers and merchants. Through its family of brands, including MasterCard®, Maestro® and Cirrus®, MasterCard Worldwide serves consumers and businesses in more than 210 countries and territories. For more information go to www.mastercardworldwide.com.

About Ariba, Inc. Ariba, Inc. is the leading provider of spend management solutions to help companies realize rapid and sustainable bottom line results. Successful companies around the world in every industry use Ariba Spend Management™ software and services. Ariba can be contacted in the U.S. at 1.650.390.1000 or at www.ariba.com.

Ariba, the Ariba logo, AribaLIVE and SupplyWatch are registered trademarks of Ariba, Inc. Ariba Spend Management, Ariba Spend Management. Find it. Get it. Keep it., Ariba. This is Spend Management, Ariba Solutions Delivery, Ariba Analysis, Ariba Buyer, Ariba Category Management, Ariba Category Procurement, Ariba Contract Compliance, Ariba Contracts, Ariba Contract Management, Ariba Contract Workbench, Ariba Data Enrichment, Ariba eForms, Ariba Electronic Invoice Presentment and Payment, Ariba Invoice, Ariba Sourcing, Ariba Spend Visibility, Ariba Travel and Expense, Ariba Procure-to-Pay, Ariba Workforce, Ariba Supplier Network, Ariba Supplier Connectivity, Ariba Supplier Performance Management, Ariba PunchOut, Ariba QuickSource, PO-Flip, Ariba Settlement, Ariba Spend Management Knowledge Base, Ariba Ready, Ariba Supply Lines, Ariba Supply Manager, Ariba LIVE and It’s Time for Spend Management are trademarks or service marks of Ariba, Inc. All other trademarks are property of their respective owners.