Sesium is an AI-powered clinical assistant for psychologists, built by therapists for Spanish-speaking practices. It transcribes sessions in real time, whether in person, through its integrated video calls, or alongside Zoom, Google Meet and Teams. Clinicians can query the transcript, their notes and the patient’s history without leaving the session. After each session, Sesium produces customizable summaries and analysis and updates a living clinical memory that links the people, events and emotions recurring across a patient’s sessions. The platform also manages scheduling, forms, informed consent and appointment reminders, with encrypted data handling designed around Argentina’s personal data protection law.