Message archiving software can help organizations achieve regulatory and corporate policy compliance, reduce the cost of eDiscovery, and reduce storage costs through mailbox management. The top six message archiving software vendors are Computer Associates, EMC, IBM, Open Text, Symantec, and ZANTAZ. To see how these vendors stack up against each other, Forrester evaluated their strengths and weaknesses across 74 criteria. The result: Symantec and Computer Associates come out on top because they meet multiple business requirements with top-notch functionality and provide message archiving in the context of a broader solution — in their cases, information life-cycle management (ILM). Included in this report is an interactive vendor comparison tool that provides detailed product evaluations and customizable rankings.