Understanding mental health conditions requires a deep dive into our emotional states. Tools such as the Patient Health Questionnaire (PHQ-9) and the Toronto Alexithymia Scale (TAS-20) have been instrumental in facilitating such clinical investigations. In the dilemma of PHQ-9 vs TAS-20, Harmony comes to the rescue by offering an effortless comparative analysis using artificial intelligence. Leveraging language models, Harmony empirically harmonises the questionnaire items, presenting a percentage match of items from the PHQ-9 and TAS-20 questionnaires. As psychologists and researchers, the process of data harmonisation can be time-consuming, complex, and subjective. When considering PHQ-9 vs TAS-20, Harmony’s user-friendly interface invites you to either select tools from its extensive database or upload your own tools in PDF format. It retains the novelty by offering comparability of items across multiple languages, thus broadening the research scope. With its robust analytical framework, Harmony transcends linguistic and narrative complexities, providing a new dimension to the PHQ-9 vs TAS-20 discussion. By utilising Harmony, you can generate a seamless comparison of the PHQ-9 and TAS-20 scales, opening a gateway to more accurate psychology research and thus contributing to the development of more effective mental health interventions.