Company to Exhibit at Ascential World 2004; Co-founder to Participate in Technical Panel

Las Vegas, Ascential World 2004—October 25, 2004—Netezza Corporation today announced the continued expansion of its technology alliance with Ascential Software Corporation (Nasdaq: ASCL), the enterprise data integration leader. At this year’s Ascential World event, the global data integration conference, Netezza will highlight the ways in which this partnership between the two companies enables joint customers to achieve real performance and scalability for critical data analyses. Netezza is a silver sponsor and is exhibiting at the Ascential World 2004 Partner Pavilion.

“We are committed to protecting our customer’s investments in their business intelligence applications and data integration solutions,” said Bill Doyle, vice president, channel sales, Netezza Corp. “By working closely with Ascential Software, we are able to deliver a seamless and compatible infrastructure that can fully exploit the breadth of data integration capabilities of the Ascential Enterprise Integration Suite™ with the query and analytical power of the Netezza Performance Server® (NPS®) system.”

As a provider of data warehouse infrastructure, Netezza has established relationships with complementary technology companies to offer a complete foundation for a Data Warehouse/Business Intelligence application platform. By combining enterprise data integration solutions from Ascential Software with the NPS system, joint customers can leverage the capabilities of Ascential Software’s Business Intelligence platforms with the power of the NPS system to access and analyze terabytes of data faster.

“We value the relationship we have forged with Netezza and look forward to growing our partnership,” said Pete Inzana, group product manager, Ascential Software. “Together we can offer customers the tools they need to gain access to large volumes of data and transform that data into usable strategic business information.”

In addition to Netezza’s exhibit at Ascential World, company co-founder and Chief Technology Officer Foster Hinshaw will join industry experts in the Innovators Panel discussion on Monday, October 25 at 11:30 a.m. The Panel will provide an interactive “town hall” format that will explore the topic of disruptive information and its impact on the technology landscape.

The Netezza Performance Server system is an enterprise-class data warehouse appliance built specifically to analyze terabytes of detailed data – 10 – 50 times faster than anything on the market. The NPS system stores, filters and processes terabytes of records within a single unit, analyzing only the relevant information for each query. Netezza has placed the CPU power next to the data, allowing the NPS system to speed through analyses that would tie up most data warehouse systems for hours, or even days, thereby enabling dramatic increases in productivity across the enterprise. Customers who have recognized the performance benefits of Netezza’s approach include AT&T Wireless, CNET Networks, Epsilon, Orange UK, Premier, Inc., Shoppers Drug Mart Corporation and The TJX Companies.

About Netezza Corporation
Netezza is a fast-growing provider of enterprise-class data warehouse appliances that deliver breakthrough performance and ease-of-use at a fraction of the cost of traditional data warehouses. The Netezza Performance Server® (NPS®) system enables Fortune 1000 customers with terabytes of dynamic, detailed data to dramatically simplify even the most complex Business Intelligence (BI) initiatives. By architecturally integrating database, server and storage within a single appliance, the NPS system delivers 10 to 50 times the performance at half the cost of existing systems. The NPS appliance is being used by data-intensive organizations in telecommunications, financial services, retail, the life sciences, government and other markets to enable faster, more sophisticated analysis while allowing companies to leverage their existing infrastructure. Founded in 2000 and based in Framingham, Mass., the Company has raised more than $53M from leading venture capital firms, including Matrix Partners, Charles River Ventures, Battery Ventures, Orange Ventures and Sequoia Capital. For more information about Netezza, please visit www.netezza.com.

About Ascential Software
Ascential Software Corporation (Nasdaq: ASCL) is the leader in enterprise data integration. Customers and partners worldwide use the Ascential Enterprise Integration Suite to confidently transform data into accurate, reliable and complete business information to improve operational performance and decision-making across every critical business dimension. Our comprehensive end-to-end solutions provide on demand data integration complemented by our professional services, industry expertise, and methodologies.

Ascential Software is headquartered in Westboro, Mass., and has more than 3,000 customers and partners globally across such industries as financial services and banking, insurance, healthcare, retail, manufacturing, consumer packaged goods, telecommunications and government. For more information call 1-800-966-9875 (or 1-508-366-3888 from outside the U.S. or Canada) or visit the Ascential Software website at www.ascential.com.

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Netezza, the Netezza logo, NPS, Performance Server, Netezza Performance Server, Intelligent Query Streaming, Asymmetric Massively Parallel Processing and AMPP are trademarks or registered trademarks of Netezza Corporation in the U.S. and/or other countries. All rights reserved. All other company, brand and product names contained herein may be trademarks or registered trademarks of their respective holders.

© 2004 Ascential Software Corporation. All rights reserved. Ascential is a trademark of Ascential Software Corporation or its affiliates and may be registered in the United States or other jurisdictions.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995: This release contains forward-looking statements based on current expectations or beliefs, as well as a number of assumptions about future events, and these statements are subject to important factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. The forward-looking statements in this release address a variety of subjects including, for example, the functionality, characteristics, quality and performance capabilities of Ascential Software's products and technology; results achievable and benefits attainable through deployment of Ascential Software's products and provision of services; the ability of Ascential Software’s products to streamline operations, improve customer support, expedite business transactions, and make better tactical and strategic decisions on the basis of the best available information; reduction of cost of ownership; and increased return on IT investment. The following factors, among others, could cause actual results to differ materially from those described in these forward-looking statements: the ability of Ascential Software to expand its market share; growth rates for the enterprise data integration software market; general business conditions in the software industry, the technology sector, and in the domestic and international economies; rapid technological change in the markets served by Ascential Software; dependence on international operations; global and geopolitical instability; and difficulties that Ascential Software may experience integrating technologies, operations and personnel of completed or future acquisitions. For a detailed discussion of these and other cautionary statements, please refer to the filings made by Ascential Software with the Securities and Exchange Commission, including, without limitation, the most recent Quarterly Report on Form 10-Q. Ascential Software disclaims any intent or obligation to update any forward-looking statements made herein to reflect any change in Ascential Software's expectations with regard thereto or any change in events, conditions, or circumstances on which such statements are based. Ascential Software is not responsible for statements attributed to third parties within this release or in any materials referenced herein.

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