IoT Cloud Platform Explained: The Layer Everyone Underestimates Ask ten people what an IoT cloud platform is and you will get ten answers. Some mean AWS IoT Core or Azure IoT Hub. Some mean the dashboard their supplier gave them. Some mean the whole system from sensor to spreadsheet. That vagueness causes real problems in procurement. Teams buy a platform expecting it to solve a job it was never designed for, then spend a year building the missing pieces themselves. Here is a clearer way to think about it — and the part of the stack that consistently gets underestimated.