Smart waste management, the Jaete sensor and cloud-based platform that monitor waste-bin fill levels in real time using radar technology, are the field Wastebook leads, an Oulu-based innovator revolutionizing waste collection. Founded in 2019, its IoT-enabled Jaete sensor enables optimized collection schedules and reduces unnecessary pickups by up to 20%, while its platform provides data analytics for waste-management insights, serving housing companies, municipalities, and waste-management firms. With 55% of Oulu's housing companies adopting its solutions, Wastebook has partnerships with Haurun Jateauto and PWS Finland, and international collaborations such as with IT Optics in Belgium, and its systems are maintenance-free, weather-resistant, and integrated with mobile apps for seamless operation, supporting sustainability by minimizing collection costs and emissions in line with circular-economy goals.