EcoSteer is an IoT and Blockchain software startup for data ownership and monetization. Based on end-to-end encryption and smart contracts, EcoSteer US-patented Data Ownership Platform (DOP) is a data sharing governance layer that decentralizes data access control, giving it back to data owners, who have full control over third party access to their data and are compensated for data sharing. DOP supports GDPR-compliant, decentralized corporate data streams marketplaces, allowing companies to invite selected partners to access IoT customer data in compliance with privacy laws, generating new revenues while involving customers into the data value chain.