http://www.marimba.com

MOUNTAIN VIEW, Calif., - Oct. 21, 2002 - Marimba, Inc. (Nasdaq: MRBA), the Software Change-Management Company, today announced it has joined BMC SoftwareÂ’s MarketZone Product Alliance Program as a Premier Level member. As a MarketZone member, Marimba is working directly with BMC Software, Inc. (NYSE:BMC), the leading provider of enterprise systems management, to extend the availability of business-critical applications by allowing customers to proactively monitor the health of networks and applications, and take immediate action across a heterogeneous datacenter environment. Marimba and BMC Software also plan to participate in product integration, joint sales, and marketing efforts.

BMC SoftwareÂ’s PATROL technology helps companies proactively manage from a central console their entire enterprise in a secure manner to maximize productivity and ensure that applications are performing optimally. MarimbaÂ’s Software Change Management offerings provide automated software distribution capabilities to provision, change, configure, maintain, and repair distributed desktop and server applications from a central location. The two companies plan to develop a Knowledge Module that will integrate their offerings. Combined, the resulting solution from Marimba and BMC Software will provide a single, automated, end-to-end systems management offering.

“By working with Marimba, we’ll be able to deliver a unified solution to help our mutual customers further manage their enterprise,” said Calvin Guidry, vice president and general manager, Enterprise Systems Management, BMC Software. “Our PATROL solutions offer customers unprecedented power and flexibility for monitoring applications in any environment, and Marimba’s Software Change Management offerings help companies act immediately to resolve enterprise IT infrastructure issues. Together, we will offer a complete enterprise systems management solution from alert generation to resolution.”

The partnership will help companies ease systems management activities by enabling them to:

· Quickly Resolve Problems and Reduce Downtime - by closing the information feedback loop between monitoring and server management systems. Once problem areas have been identified by BMC Software’s PATROL solutions, Marimba’s software distribution capabilities will help companies issue patches and repair or replace applications, operating systems or other content items in an automated fashion.

· Improve Ease of Maintenance - by automating repetitive monitoring, auditing, and change management tasks across a heterogeneous IT environment.

· Reduce Total Cost of Ownership - by leveraging existing skills and expertise. The complementary nature of the offerings will enable companies to exploit their knowledge of Marimba and BMC Software products, allowing their employees to optimize performance while reducing requirements to learn additional products.

· Better Plan and Manage Assets - through collection and reporting of comprehensive software and hardware inventory information across all platforms.

“To reduce the costs of managing and maintaining networks and complex applications, companies must be able to efficiently monitor their systems, and react swiftly,” said Rich Wyckoff, Marimba’s president and CEO. “Together, the Marimba-BMC Software offerings will help companies significantly reduce operational costs and improve uptime. Our relationship will make it easier for customers to obtain the industry’s premier Systems Management solutions for heterogeneous server environments.”

About BMC Software

BMC Software, Inc. [NYSE:BMC], is a leader in enterprise management. The company focuses on Assuring Business Availability for its customers by helping them proactively improve service, reduce costs and increase value to their business. BMC Software solutions span enterprise systems, applications and databases. Founded in 1980, BMC Software has offices worldwide and is a member of the S&P 500, with fiscal year 2002 revenues of approximately $1.3 billion. Visit www.bmc.com to learn more.

About Marimba

Marimba, Inc., the Software Change-Management Company, is headquartered in Mountain View, Calif. MarimbaÂ’s Desktop/Mobile Management, Server Change Management, and Embedded Management product families allow Global 2000 companies to better manage their IT resources, increase operational efficiency and reduce IT costs. Additional information is available at www.marimba.com.

This press 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, and is subject to the safe harbors created by these sections. These forward-looking statements include statements regarding: the ability of the announced Marimba-BMC alliance to provide the industryÂ’s premier systems management solution for heterogeneous server environments; planned joint integration, sales and marketing activities; and other specific technical and performance benefits customers may expect from these Marimba and BMC products and integrated solution. Those results are subject to a number of risks and uncertainties, including: the technical challenges specific to the applicable products and their integration, which could impact whether customers are able to achieve expected benefits using the Marimba-BMC integrated solution; and other technical, marketing and business factors particular to Marimba and BMC. Actual results may differ materially due to these and other factors. The matters discussed in this press release also involve risks and uncertainties described from time to time in MarimbaÂ’s filings with the Securities and Exchange Commission (SEC). In particular, see the Risk Factors described in MarimbaÂ’s most recently filed Annual Report on Form 10-K and Quarterly Reports on Form 10-Q, as submitted to the SEC and as may be updated or amended with future filings or submissions. Marimba undertakes no obligation to release publicly any updates or revisions to any forward-looking statements contained in this press release that may reflect events or circumstances occurring after the date of this press release.

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Marimba is a registered trademark of Marimba, Inc. in the U.S. and/or certain other countries. Other product, trademark, company or service names mentioned herein are the property of their respective owners. BMC Software, the BMC Software logos, and all other BMC Software product or service names are registered trademarks or trademarks of BMC Software, Inc.