OCEANPORT, N.J. — May 12, 2008 — CommVault (NASDAQ: CVLT) today announced that it has been recognized by leading analyst firm, Gartner, Inc., with a "Positive" rating in Gartner's MarketScope for Enterprise Backup/Recovery Software, 2008 report published April 18, 2008ⁱ. A Gartner MarketScope "Positive" rating indicates that the firm recommends existing customers "continue planned investments", while potential customers should "[c]onsider this vendor a viable choice for strategic or tactical investments, while planning for known limitations." The Gartner evaluation criteria for the MarketScope included the vendor's product strategy, market responsiveness and track record, innovation and geographic strategy, among other criteria.

According to the report, "[t]he backup/recovery market is undergoing a significant change." The report also states that "[b]y 2013, surviving enterprise backup/recovery products will have transformed into recovery management solutions that unite traditional backup, replication, snapshot and continuous data protection." Acknowledging this market change, Gartner sees "the management of these capabilities becoming more unified to meet client demand for a single recovery management platform rather than having the user becoming the integrator for multiple point solutions." As users demand new approaches to meet more stringent recovery time objectives (RTOs) and recovery point objectives (RPOs), CommVault has responded to these changes by unifying snapshot, replication and backup technologies into one, singular platform with a common workflow, interface and infrastructure.

CommVault's "Positive" rating comes on the heels of the launch of the CommVault® Simpana® 7.0 software suite, the largest product release in CommVault's history. Since its introduction in July 2007, CommVault Simpana software has seen significant traction in the industry with its unique Singular Information Management® approach, and by addressing user demand for solutions that simplify storage environments while maximizing data access and availability. This latest release delivers significant new product enhancements including inline and post-process encryption options, single instance store (SIS), content indexing and search that enables direct access to information by end-users. With seamless integration and robust support for key enterprise applications including VMware and SharePoint, CommVault also offers strong replication capabilities. Today, the CommVault Simpana suite is the only product on the market that offers customers a single unified management platform that combines data protection, archiving, search, replication and resource management and reporting technologies, thereby eliminating the need for customers to deploy multiple point solutions and enabling added benefits including cost and operational savings.

"We believe that Gartner's 2008 MarketScope confirms that CommVault is a leader in the enterprise backup and recovery market. We also believe our position highlights the benefits customers derive from a single unified platform that can scale economically to handle data growth and user demand, which lines up nicely with the technology convergence occurring in this market," said David West, CommVault's vice president of worldwide marketing and business development. "As CommVault continues to execute on its Singular Information Management approach to recovery, we feel our rating in this year's MarketScope recognizes our commitment to deliver customers robust support for growing applications and server environments, leading disk-based solutions, and superior data protection, business continuity and disaster recovery capabilities."

For more information on the CommVault Simpana 7.0 software suite, please visit commvault.com/products/.

About the MarketScope
The MarketScope is copyrighted April 18, 2008 by Gartner, Inc. and is reused with permission. The MarketScope is an evaluation of a marketplace at and for a specific time period. It depicts Gartner's analysis of how certain vendors measure against criteria for that marketplace, as defined by Gartner. Gartner does not endorse any vendor, product or service depicted in the MarketScope, and does not advise technology users to select only those vendors with the highest rating. Gartner disclaims all warranties, express or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose.

About CommVault
A singular vision — a belief in a better way to address current and future data management needs — guides CommVault in the development of Singular Information Management® solutions for high-performance data protection, universal availability and simplified management of data on complex storage networks. CommVault's exclusive single-platform architecture gives companies unprecedented control over data growth, costs and risk. CommVault's Simpana® software suite of products was designed to work together seamlessly from the ground up, sharing a single code and common function set, to deliver superlative Data Protection, Archive, Replication, Search and Resource Management capabilities. More companies every day join those who have discovered the unparalleled efficiency, performance, reliability, and control only CommVault can offer. Information about CommVault is available at www.commvault.com. CommVault's corporate headquarters is located in Oceanport, New Jersey in the United States.

Safe Harbor Statement
This press release may contain forward-looking statements, including statements regarding financial projections, which are subject to risks and uncertainties, such as competitive factors, difficulties and delays inherent in the development, manufacturing, marketing and sale of software products and related services, general economic conditions and others. Statements regarding CommVault's beliefs, plans, expectations or intentions regarding the future are forward-looking statements, within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. All such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from anticipated results. CommVault does not undertake to update its forward-looking statements.

©1999-2008 CommVault Systems, Inc. All rights reserved. CommVault, CommVault and logo, the "CV" logo, CommVault Systems, Solving Forward, SIM, Singular Information Management, Simpana, CommVault Galaxy, Unified Data Management, QiNetix, Quick Recovery, QR, CommNet, GridStor, Vault Tracker, InnerVault, Quick Snap, QSnap, Recovery Director, CommServe, CommCell and ROMS are trademarks or registered trademarks of CommVault Systems, Inc. All other third party brands, products, service names, trademarks, or registered service marks are the property of and used to identify the products or services of their respective owners. All specifications are subject to change without notice.

ⁱ Gartner, Inc., "MarketScope for Enterprise Backup/Recovery Software, 2008" by Carolyn DiCenzo, Dave Russell, April 18, 2008