Background: Brain-based technologies such as Transcranial Magnetic Stimulation (TMS) are rapidly emerging as effective tools for treating mental health disorders in India. However, public awareness, attitudes and stigma surrounding these technologies remain underexplored, particularly in Indian clinical settings. Objective: This study assessed awareness, attitudes, practices and stigma associated with TMS and related non-invasive brain stimulation techniques among attendees of a private psychiatry clinic in southern India. Methods: A cross-sectional survey employing a 20-item semi-structured questionnaire was administered to 66 participants. Data were analysed using descriptive statistics and inferential tests, including Chi-square, independent-samples t-test and Pearson correlation analyses. Results: Awareness of TMS was moderate, with 50.0% of respondents reporting familiarity. Education level was not significantly associated with awareness (χ² = 2.02, p = 0.568), and age differences between awareness groups were non-significant (t = 0.12, p = 0.91). Concerns regarding brain damage (41%) and memory loss (32%) were prevalent. Belief in TMS safety correlated negatively with treatment concealment (r = −0.24), indicating that perceived safety reduces internalised stigma. Conclusion: Despite partial awareness, stigma and misconceptions persist. Clinician-led educational initiatives, verified digital outreach and community engagement programmes can enhance public understanding and acceptance of brain-based therapies in India.