Abstract. This paper presents the first release of EDITS, an opensource software package for recognizing Textual Entailment developed by FBK-irst. The main contributions of EDITS consist in: i) providing a basic framework for a distance-based approach to the task, ii) providing a highly customizable environment to experiment with different algorithms, iii) allowing for easy extensions and integrations with new algorithms and resources. System’s main features are described, together with experiments over different datasets showing its potential in terms of tuning and adaptation capabilities.