We are C:aire. An international and diverse university spin-off combining knowledge in the fields of biology, architecture, and design as well as business development and innovation. Our story begins in Barcelona where extreme heat and dust from the streets in combination with the indoor air-conditioning dominate urban living. Here we met during the BUILD program for urban intelligent living design solutions funded by the EU to keep our development sustainable. Not only are we extremely caring about our planet’s future, but we are also eager to change it to the better. That is why we came to the path of fighting indoor air pollution and related consequences on health and well-being with our natured-based air filtration to improve the life of all those who would like to breathe freely inside their four walls. On our way towards air purification we won several prizes in the Entrepreneurship Avenue 2020 and the StartupLive competition and we are looking forward to continuing on our mission of ca(i)re.