The 451 Research Vendor Evaluations survey utilizes the expertise of a proprietary panel of more than 50,000 senior IT buyers and leverages our robust data-collection methodologies. This study incorporates 1,091 complete responses to a web-based survey that polled IT and Internet of Things (IoT) decision-makers worldwide, primarily based in North America and Europe. 451 Research supplemented the web-based survey responses by conducting 20 in-depth phone interviews with IoT IT managers and C-level executives. Our survey respondent base includes a representative sample of small, medium, large and very large enterprises spanning the private and public sectors across 11 distinct vertical market segments. The 451 Research Voice of the Enterprise: IoT Advisory Report tracks the latest IoT trends. This includes the drivers, challenges and impediments for enterprises' deployment of IoT projects and initiatives. In addition to regular quarterly topics, the latest survey evaluates the major IoT Data Analytics and Professional Services vendors' products and services. The Vendor Evaluations Advisory Report examines the chief opportunities and capabilities of the major IoT hardware, networking, application and connectivity vendors, third party systems integrators, Professional Services vendors and investors. The Vendor Evaluations survey also provides insights into IoT vendors' products and strategies via the Promise and Fulfillment indices/barometer which compares/contrasts the vendors' marketing initiatives against their ability to execute and deliver on 11 specific metrics.