Ariba, Inc. (Nasdaq:ARBA), the leading spend management solutions provider, today announced that Citi’s Global Transaction Services unit will use Ariba offerings to deliver enhanced invoice and payment solutions to its clients worldwide. Citi will integrate Ariba® Invoice and Payment™ with its own electronic payment and supplier finance offerings to enable end-to-end financial supply chain management for its clients. Citi is the first financial services company to agree to private label Ariba’s spend management solutions to create additional value for customers.

“Citi has a long history of driving innovation to meet the unique and evolving needs of our clients,” said Julie Monaco, Regional Head, North America, Global Transaction Services, Citi. “Leveraging Ariba’s invoice and payment solutions in combination with our own industry-leading offerings, we can bring to market an integrated solution that enables clients to unlock the full potential of working capital efficiencies and realize cost reductions across the organization.”

Citi, a leader in procurement card solutions, will integrate its electronic payment solutions, including a recently launched buyer-initiated purchase card, seamlessly with Ariba’s invoice and payment offerings. Additionally, Citi will establish connectivity to its market leading supplier finance services. These enhancements will enable Citi clients to:

• Reduce invoice processing cost and cycle time
• Perform electronic settlement via ACH and Purchasing Card
• Transition suppliers from paper to electronic payments
• Access working capital efficiencies through Ariba’s dynamic discount solutions and Citi’s supplier finance platform
• Increase visibility into A/P spend through enhanced analytics reporting

Delivered on-demand via the Ariba Supplier Network™, Ariba Invoice and Payment provides robust invoice routing, reconciliation and payment processing for buyers while also giving suppliers real-time visibility into the buyer’s invoice and payment approval process. Using the solution, companies can capture 100 percent of their supplier invoices electronically, and eliminate the paper invoices that clog accounts payable organizations by delivering them to the web browsers of accounts payable personnel. With more than 160,000 registered suppliers in 115 countries engaging in transactions worth more than $100 billion a year, the Ariba Supplier Network is one of world’s largest open business transaction networks. Leveraging the network, companies can automate interactions with key trading partners to achieve efficiency and accuracy throughout the procure-to-pay cycle.

“Citi is a recognized leader in delivering innovative treasury and cash management solutions that enable companies to effectively manage their financial supply chains on a global basis,” said Bob Solomon, Senior Vice President and General Manager, Ariba Supplier Network. “By integrating our invoice and payment offerings, Citi can enhance these solutions and accelerate the results that its clients achieve.”

About Citi

Citi, the leading global financial services company, has some 200 million customer accounts and does business in more than 100 countries, providing consumers, corporations, governments and institutions with a broad range of financial products and services, including consumer banking and credit, corporate and investment banking, securities brokerage, and wealth management. Citi's major brand names include Citibank, CitiFinancial, Primerica, Smith Barney, Banamex, and Nikko. Additional information may be found at www.citigroup.com or www.citi.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.

Copyright © 1996 – 2008 Ariba, Inc.

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.

Ariba Safe Harbor

Safe Harbor Statement under the Private Securities Litigation Reform Act 1995: Information and announcements in this release involve Ariba's expectations, beliefs, hopes, plans, intentions or strategies regarding the future and are forward-looking statements that involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Ariba as of the date of the release, and we assume no obligation to update any such forward-looking statements. These statements are not guarantees of future performance and actual results could differ materially from our current expectations. Factors that could cause or contribute to Ariba's operating and financial results to differ materially from current expectations include, but are not limited to: delays in development or shipment of new versions of Ariba's products and services; lack of market acceptance of Ariba's existing or future products or services; inability to continue to develop competitive new products and services on a timely basis; introduction of new products or services by major competitors; the ability to attract and retain qualified employees; difficulties in assimilating acquired companies; long and unpredictable sales cycles and the deferrals of anticipated orders; declining economic conditions; inability to control costs; changes in the company's pricing or compensation policies; significant fluctuations in our stock price; the outcome of and costs associated with pending or potential future regulatory or legal proceedings; the impact of our acquisitions, including the disruption or loss of customer, business partner, supplier or employee relationships; and the level of costs and expenses incurred by Ariba as a result of such transactions. Factors and risks associated with its business, including a number of the factors and risks described above, are discussed in Ariba's Form 10-Q filed with the SEC on May 7, 2008.

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