• IMS has evolved from a dedicated services model to a shared services model and eventually into today’s output-based model. While each model has its own set of challenges, the competitive market place has spurred IMS providers to innovate their delivery models, as well as their service offerings. On the flipside, customers are moving workloads from traditional shared, virtualized and dedicated infrastructure products to increasingly specialized infrastructure and application environments, including IaaS and SaaS. Customer-needs require service providers to move to Infrastructure-as-a-Utility phase (Phase 5) that provides a service-centric approach with aligned delivery capabilities. At the same time, ensuring near-perfect uptime of the IT infrastructure is an imperative. The hyperconvergence trend started making a significant impact on enterprise IT toward the first half of 2015. IT's interest in converging virtualized servers, storage, and networking using software is so far doing fine in 2016. With the infrastructural demands, the complications of security & data loss have also increased and hence security of organizations needs to be top-notch in order to avoid such complications. Companies have become more aware of the importance of these issues and have started to invest in Compliance management related services. Amongst the notion, CIOs are grappling with the inability of existing infrastructure to keep up with increasing demands from business and outdated IT processes that are incapable of exploiting new technologies. Therefore, to provide the necessary flexibility, reduce the high costs created by IT sprawl and shift resources away from routine maintenance towards innovation and strategic initiatives, the CIO seek a different model through which IT infrastructure services are delivered. Where do they find such emerging trends in the services put to use? We at CIOReview understand the emerging significance of IMS vendors for complete infrastructures solutions spread across many heterogeneous sources and technology trends. So, we present to you a list of 20 Most Promising IMS Providers. Being closely scrutinized by a distinct panel of judges including CEOs, CIOs, CXO, analysts and CIOReview editorial board we believe that these vendors can set standards and help enterprises accelerate high productivity, cost reduction, good quality & performance.