GreenCityZen is an eco- startup that designs and sells technology solutions for the environmental measurement, addressed to its environmental industrial customers and the smart and sustainable cities. Green CityZen develops the Humm solution , " IoT for the environment " , an innovative solution for the management and control of environmental sensors fleets, cost effective, scalable , and natively interoperable. The Humm box collects data continuously toward the cloud, analyzing and combining them with external data sources to effectively measure impacts and improve environmental performance. GreenCityZen designs and sells innovative, cost effective and scalable IoT (internet of things) solutions for the management and monitoring of environmental sensors fleets. These solutions continuously capture data, store them in the cloud, analyzing and eventually combining them with external data sources to measure environmental impacts and improving environmental performance for its customer’s efficiency and productivity.