Monet d.o.o. Replaces Legacy Billing Platform with Portal Software; Portal's Real-Time Solution Enables Monet GSM to Deliver Innovative Services to a Rapidly Expanding Customer Base

Business Wire, July 5, 2005

CUPERTINO, Calif. -- Portal Software, Inc. (Pink Sheets:PRSF) the premier global provider of billing and Revenue Management solutions for the global communications and media markets, announced today that Monet d.o.o., a leading mobile operator in Montenegro with 44 percent market share, has selected Portal 7, Portal's single-platform convergent billing and Revenue Management solution. Portal 7, which will replace the entire legacy billing infrastructure currently in use at Monet, will enable the company to quickly and competitively deliver innovative new services to its rapidly expanding customer base.

Portal won the prestigious contract after a rigorous six-month selection process. Monet chose Portal's highly flexible billing solution based on its ability to enable Monet to quickly bring new services to market and scale effectively as Monet continues to grow and enrich its brand.

"We chose Portal over competing solutions because of its global experience and leadership in this market," said Eva Sabanovic, chief information officer of Monet d.o.o. "Portal's unmatched best practices will ensure that implementation will be swift, seamless, and cost-effective. Additionally, Portal's solutions will enable us to deliver converged pre- and postpaid billing services on a single platform. As we continue to add new customers and services, Portal's robust billing solution will be an essential part of our strategy to successfully manage growth, maximize revenue, and ensure customer satisfaction."

"Portal is delighted to have been awarded this contract by one of the Balkans' most innovative operators," said Bhaskar Gorti, Portal's senior vice president of global accounts, marketing, and alliances. "Monet will now be able to bill for GPRS data, MMS, and other progressive services while providing unparalleled customer service to its growing customer base. This solution will be instrumental in helping Monet achieve its most important business goals."

About Portal Software, Inc.

Portal is the leading worldwide provider of billing and Revenue Management solutions for the global communications and media markets. The company delivers the only platform for the end-to-end management of customer revenue across offerings, channels, and geographies. Portal's solutions enable companies to dramatically accelerate the launch of innovative, profit-rich services while significantly reducing the costs associated with legacy billing systems. Portal is the Revenue Management partner of choice to the world's leading service providers, including Vodafone, AOL Time Warner, Deutsche Telekom, Telstra, NTT, China Telecom, Reuters, China Mobile, Telenor Mobil, and France Telecom.

About Monet d.o.o.

Monet d.o.o. was launched on July 1, 2000 as part of Telekom Montenegro and began operating as an independent company on August 1, 2000. Monet is a network that follows the trends in the world of mobile telecommunications and it continually provides new, advanced services. Professionalism, use of the latest generation mobile telecommunication equipment, providing a high quality signal for Montenegro, and continuous efforts in retaining and upgrading network performances and service quality are also reasons for the sky-high success of this company. In the end -- as at its beginning -- the orientation towards the client is Monet's guiding principle that has given the company its well known reputation for excellent customer support.

Forward Looking Statement

Statements in this release contain forward looking statements that involve uncertainties and risks. These and other factors are described in detail in our Annual Report on Form 10-K for the fiscal year ended January 31, 2004 and our quarterly reports on Form 10-Q. All statements made in this press release are made only as of the date set forth at the beginning of this release. Portal undertakes no obligation to update the information in this release in the event facts or circumstances subsequently change.

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