A list of Trusted Research Environments throughout Europe, that are commonly in use by social scientists in Europe. A Trusted Research Environment (TRE) is a virtual machine on which a researcher can perform analyses on sensitive data, but the data cannot leave the environment without explicit approval by the data holder. This leaves the data holder in complete control of the data, facilitating GDPR compliance. The data may be sensitive because of privacy, copyright or commercial reasons. The concept is used a lot in the social sciences. Many data holders provide their own TRE, although some TREs are data holder-agnostic. For more information, check the attached GitHub repository.