The AWS IoT Platform is an enterprise level platform that can support billions of devices and trillions of messages.
PlatformIO comes with its own cross-platform IDE and unified debugger as well as remote unit testing and firmware updates.
Intel's IoT model delivers trusted data to the Cloud, and ongoing value through analytics.
Azure IoT Suite packages together multiple Azure services with custom extensions as preconfigured solutions.
The IBM Watson IoT Platform for Bluemix provides a versatile toolkit that includes gateway devices, device management, and powerful application access.
Predix is an industrial IoT platform specifically designed for the unique and complex challenges of industrial data.