IoT platforms are the support software that connects everything in an IoT system. An IoT platform facilitates communication, data flow, device management, and the functionality of applications.
we can say IoT platform is a multilayered technology, that connects the sensors/devices, provision them, manage them & can automate the connection of the devices in the Internet of Things. With IoT platform its easy to connect to the devices to the cloud & data processing. It connects remote devices to user applications and manages all the interactions between the hardware and the application layers.
Some of the main common features of IoT platforms are,
Registry for recognizing devices
Software Development Kit for devices
Secure Device Gateway
Rules engine for inbound message evaluation
Some of the major IoT platforms are listed below
Google Cloud IoT
AWS IoT Core
Microsoft Azure IoT
IBM Watson IoT
Bosch IoT Suite
Oracle IoT cloud platform
There are free IoT platforms available also like