This publication aims at showcasing how citizen-led sustainability innovation is becoming an emerging reality in Europe. It describes how multinationals, SME´s, start-ups and cooperatives are co-creating with citizens and end users, sustainable innovation products, services and enterprises aimed at solving complex societal and/or environmental challenges. The cases analyzed are from three European countries (Spain, France and Greece) in four key industry domains (food, living, mobility and energy). This publication is part of a broader study: the three- year European Commission-funded project ‘EU-InnovatE. Sustainable Lifestyles 2.0: End User Integration, Innovation and Entrepreneurship’, a groundbreaking project involving fourteen leading Universities and think tanks (amongst them, ESADE Business School) aimed at accelerating the shift towards more sustainable lifestyles and a green economy in Europe.