Dooyoo.de AG was a German-based consumer review platform that allowed users to write and read reviews about a wide range of products and services. Launched in the early 2000s, Dooyoo focused on creating a community-driven platform where users could share their experiences and opinions to help others make informed purchasing decisions. In 2014, Dooyoo was acquired by Ciao (which itself was owned by Microsoft at the time). Ciao was a similar online review platform, and the acquisition allowed the combined entity to strengthen its presence in the European market. In later years, Ciao itself was absorbed into Microsoft's broader business, and the platform essentially ceased operations.