We are experiencing a revolution of technology, and the Internet of Things (IoT) is at the core of it. Apache Software Foundation, Eclipse, the Linux Foundation and Fiware, four of the main actors in Open Source, have put in place their own IoT architectures powered by different Open Source projects. In this talk, we take a step back and look at the communities behind these projects. The goal is to uncover collaboration and community behaviors within each ecosystem and possible crossover between communities. The project uses activity and community analysis based on the data extracted from Git and Github issue trackers using the open source GrimoireLab platform. Let’s take a look together at the open source IoT landscape and discuss afterwards what this means for the future of IoT.