In Forrester's 53-criteria evaluation of data virtualization — also known as information-as-a-service (IaaS) — vendors, we found that Informatica, IBM, Composite Software, and Denodo Technologies lead the pack because of strong enterprise-class data virtualization features and functionality such as real-time integration, data quality, transformation, caching, and modeling. SAP, Microsoft, Oracle, Stone Bond Technologies, and Red Hat are Strong Performers; each offers a viable option to support particular use cases. Although Oracle no longer positions itself in the data virtualization market, Forrester evaluated its solution as a nonparticipating vendor. Red Hat continues as the most substantial vendor supporting an open source data virtualization solution. This market has sufficiently matured in that its Leaders include large well-established platform vendors, but it continues to exhibit important innovation from smaller players more exclusively focused on information virtualization and federation.