IISY Oy

IISY Oy is a Finnish property technology company founded in 2017 by Samu Niska and Antti Jaakko Alanko offering indoor air quality and building performance solutions across real estate portfolios. The company develops the Freesi platform, which combines IoT sensor data, analytics, and user feedback to monitor and optimise indoor conditions at scale. Its solutions are deployed across commercial, public, and residential assets, supporting portfolio-level oversight of indoor environments and contributing to operational efficiency and ESG-related objectives.