IoT (Internet of Things) data marketplaces are platforms that allow businesses and organizations to buy and sell data generated by IoT devices and sensors. These marketplaces provide access to real-time and historical data on a wide range of topics such as weather, traffic, energy consumption, and industrial equipment performance. This data can be used for a variety of purposes such as smart city planning, predictive maintenance, and risk management. IoT data marketplaces can be operated by IoT service providers, data providers, or independent third-party providers. Examples of IoT data marketplaces include Ayla Networks, ThingWorx, and GE Predix.