© 2019 Association for Computing Machinery. This paper introduces Speculo. The primary purpose of Speculo is to support in the exploration and detection of social networks accounts that are managed by the same physical person: Multiple Identities Detection (MID). Speculo investigates MID within the same social network, demonstrated here using Twitter. This is achieved by deeply exploring users' data from different perspectives and presenting it in an interactive and user-friendly interface. Speculo opens new perspectives to build a platform that automatically helps mining identities in large social networks. Implementation details of Speculo and two application scenarios are described in this paper.